Quick filters:
Page 1 of 1
Ctenidium Stock Photos and Images
RF2WBMFEN–Ctenidium molluscum (comb-moss) occurs in many calcareous habitats. It is native to Eurasia and Northern America.
RMP2D182–. English: The earliest visual depiction of a 'hypothetical ancestral mollusc' or 'HAM'. a. Anus. o. Ovary (not shown in illustration). b. Buccal mass. c. Contractile sac (nephridium). pp. Propodium. ep. Epipodium. g. Tentacles. u. Auricle. i. Eye or optic nerve. j. Auditory vesicle or nerve. k. Stomach. k'. Pyloric cecum. n. Branchire (ctenidium). mt. Metapodium. ms. Mesopodium. v. Ventricle. w. Aorta. x. Cerebral ganglia. y. Pedal ganglia. z. Parieto-splanchnic ganglia. ?. Buccal ganglia. . 1853. T. Huxley 25 Hypothetical Ancestral Mollusc by Huxley
RF2X047YD–This mossy wall is on Lon Ddinas lane in North Wales near Tregarth. The species include Ctenidium molluscum and Porella platyphylla.
RF2WNYD5N–Moss and lichens on the bark of a tree in a spruce taiga forest. Karelia, Orzega. Yellow green moss on the trunk. Ctenidium molluscum. Necker moss
RM2AWDB06–The Cambridge natural history . ctenidium (never two), some-times of secondary branchiae, variously placed, while sometimesno special organ exists. The prolongation of the foot into lateral epipodia or parapodia(possibly to aid in swimming), and the effect of the epipodiaupon the shell, according as they involve it completely orpartially, are among the most instructive features of theOpisthobranchiata. If the epipodia are developed on the 428 OPISTHOBRANCHIATA anterior portion of the body, and do not become reflected, theymay, as in most Pteropoda Thecosomata, not directly affect theshell. But
RMPG3YTA–. A manual of zoology. Zoology. IV. GASTEROPODA: PULMONATA 335 The head and usually eyes and tentacles are lacking, while the fins (greatly developed parapodia) are highly characteristic, giving the name 'wing-footed' to these forms. They have rarely a single ctenidium. The THECASOMATA have shells, Limacinid^, Hyaleid/E- The shells of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Hertwig, Richard, 1850-1937; Kingsley, J.
RMMABCWW–. Dr. H. G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . Entstehung der Gastropodenasymmetrie nach Lang. A. Ursprüngliche Lage. B. Günstigste Lage für die Respiration. C. Günstigste Lage für die Locoraotion. D. Daraus resultirende Mittellage. E. Die durch D. bewirkten Druckverhältnisse. Buchstaben in A—D.: a After, et Ctenidium. f Fuss. k Kopf, mh Mantelhöhle. o Mund, sm Schalenmuskel.
RMRYG51T–Dr. H. G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild drhgbronnsklasse1312bron Year: 1892 Entstehung der Gastropodenasymmetrie nach Lang. A. Ursprüngliche Lage. B. Günstigste Lage für die Respiration. C. Günstigste Lage für die Locoraotion. D. Daraus resultirende Mittellage. E. Die durch D. bewirkten Druckverhältnisse. Buchstaben in A—D.: a After, et Ctenidium. f Fuss. k Kopf, mh Mantelhöhle. o Mund, sm Schalenmuskel.
RF2WNYC1F–Moss and lichens on the bark of a tree in a spruce taiga forest. Karelia, Orzega. Yellow green moss on the trunk. Ctenidium molluscum. Necker moss
RM2AWDHNF–The Cambridge natural history . spiral. In Pleurotomaria wehave the case of a genuslong supposed to be extinct.More than 1100 fossilspecies have been described, and within the last 38 years al;)Out20 specimens, belonging to 5 species, have been discovered in aliving state. Fam. 4. Bcllerophontidae.—Shell nautiloid, spire generallyconcealed, aperture large, sinus or perforations central (Fig. 179,p. 266). Ordovician — Trias. Genera: Bellerojyhon, Trema-tonotus, Cyrtolites. Section II.—Azygobranchiata.—One ctenidium (the left)present.. Fig. 269. Pleurotomaria adansoniana Cr. ami F.,Tobago. X i.
RMPFG56R–. Das Urogenitalsystem von Ampullaria gigas Spix. Gastropoda; Mollusks. VIKTOR SACHWATKIN Vorne, unmittelbar hinter dem Ctenidium (kb) findet sich der Vorder- lappen (nv), hinter diesem der Hinterlappen (nh) der Niere. Das was ich bei der makroskopischen Beschreibung als Lamellen bezeichnet habe, sind Gefässe (c, Fig. M), in welchen das Blut aus der Vena afferens zur Kieme, wie wir das weiter sehen werden, fliesst. An der Oberfläche des Hinter- lappens (nh), senkrecht zu ihr, sind zahlreiche kleine Gefässe gelegen. Tiefer, dem Lumen der Nierenkammer zu bilden sie grössere Gefässe, die schliess
RMMABEM9–. Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . Entstehung der Gastropodenasymnietrie nach Lang. A. Ursprüngliche Lage. B. Gunstigste Lage für die Respiration. C. Günstigste Lage für die Locomotion. D. Daraus resultirende Mittellage. E. Die durch D. bewirkten Druckverhältnissc. Buchstaben in A-D.: «After, et Ctenidium. f Fuss. Ä; Kopf, w/i Mantelhöhle. 0 Mund, sm Schalenmuskel.
RMRYG49J–Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild drhgbronnsklasse0302bron Year: 1896 C. Entstehung der Gastropodenasymnietrie nach Lang. A. Ursprüngliche Lage. B. Gunstigste Lage für die Respiration. C. Günstigste Lage für die Locomotion. D. Daraus resultirende Mittellage. E. Die durch D. bewirkten Druckverhältnissc. Buchstaben in A-D.: «After, et Ctenidium. f Fuss. Ä; Kopf, w/i Mantelhöhle. 0 Mund, sm Schalenmuskel.
![Introduction à l'étude des mollusques . eure du manteau : les filaments bran-chiaux, souvent peu élevés, sont prolongésplus ou moins indéfiniment sur le côté droitde la face palléale intérieure, en arborisations vasculaires [Cremnocon-chus] et finalement, le ctenidium disparaît même tout à fait [Gerithideaobtusa). Dans les Ampullaires, cette surface intérieure du manteausest dédoublée à gauche de la branchie, constituant une chambrepulmonaire : lanimal peut ainsi respirer dans leau ou hors de leau. Fig. 41. — Pneumonoder-nia, vu du côté droit, latête en haut, grossi. I,trompe dévagi née; II, t Stock Photo](https://c8.alamy.com/comp/2AJE97T/introduction-ltude-des-mollusques-eure-du-manteau-les-filaments-bran-chiaux-souvent-peu-levs-sont-prolongsplus-ou-moins-indfiniment-sur-le-ct-droitde-la-face-pallale-intrieure-en-arborisations-vasculaires-cremnocon-chus-et-finalement-le-ctenidium-disparat-mme-tout-fait-gerithideaobtusa-dans-les-ampullaires-cette-surface-intrieure-du-manteausest-ddouble-gauche-de-la-branchie-constituant-une-chambrepulmonaire-lanimal-peut-ainsi-respirer-dans-leau-ou-hors-de-leau-fig-41-pneumonoder-nia-vu-du-ct-droit-latte-en-haut-grossi-itrompe-dvagi-ne-ii-t-2AJE97T.jpg "Introduction à l'étude des mollusques . eure du manteau : les filaments bran-chiaux, souvent peu élevés, sont prolongésplus ou moins indéfiniment sur le côté droitde la face palléale intérieure, en arborisations vasculaires [Cremnocon-chus] et finalement, le ctenidium disparaît même tout à fait [Gerithideaobtusa). Dans les Ampullaires, cette surface intérieure du manteausest dédoublée à gauche de la branchie, constituant une chambrepulmonaire : lanimal peut ainsi respirer dans leau ou hors de leau. Fig. 41. — Pneumonoder-nia, vu du côté droit, latête en haut, grossi. I,trompe dévagi née; II, t Stock Photo")
RM2AJE97T–Introduction à l'étude des mollusques . eure du manteau : les filaments bran-chiaux, souvent peu élevés, sont prolongésplus ou moins indéfiniment sur le côté droitde la face palléale intérieure, en arborisations vasculaires [Cremnocon-chus] et finalement, le ctenidium disparaît même tout à fait [Gerithideaobtusa). Dans les Ampullaires, cette surface intérieure du manteausest dédoublée à gauche de la branchie, constituant une chambrepulmonaire : lanimal peut ainsi respirer dans leau ou hors de leau. Fig. 41. — Pneumonoder-nia, vu du côté droit, latête en haut, grossi. I,trompe dévagi née; II, t
RMMABCT0–. Dr. H. G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . a a Senkrechter Schnitt durch die rudimentäre Kieme a von Patella vulgata. b Das Geruchsepithel. c Das Geruchs- ganglion, h Das Ctenidium in durchscheinendem Lichte, von oben gesehen. (Nach Eay Lankester.) Im Nacken liegen zwei kleine ovale Vorsprünge (Fig. 24). Sie sind im Innern cavernös. Ein niedriger Epithelwulst an ihrer Seite ist nervöser Natur und hat das Geruchsganglion unter sich (Fig. 25). Die Deutung 11*
RM2CEY62F–. Smithsonian miscellaneous collections. tennal ctenidium. In afew fleas a coronal ctenidium extends vertically on each side from infront of the mouth parts to the top of the head. When the coronalctenidium is accompanied by an open interantennal groove, the fleashead has the curious appearance of being capped with a spine-fringedhelmet. The posterior and ventral surfaces of the fleas head, which arenormally concealed against the prothorax, are the most difficultparts of the cranium to understand, in a morphological sense. Dor- NO. 18 SKELETAL ANATOMY OF FLEAS—SNODGRASS sally this region is ma
RMMABEAY–. Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . -St. Ctenidium von Pleurotomaria Beyrichi. A Querschnitt durch die Kieme (Ehachis mit zwei Blättern). B Querschnitt durch zwei Kiemenblättchen. C Der zuführende Abschnitt eines solchen stärker vergr. D Quer- schnitt durch die Kiemenblättchen auf der Seite des zuführenden Gefässes. af Ab- führendes Kiemengefäss. Im Längsmusculatur. ma Mantel, n Nervenlager, pf Stütz- pfeiler im Kiemenblättchen. st Stützendes Kiemenstäbchen auf der Seite des zuführenden Gefässes. zf Zuführendes Kiemengefäs
RM2CJ0BNN–. A monograph of the Najades of Pennsylvania . hang down(See fig. 4). At the posterior end the four supra-branchial canals of the two gills of the right andleft side are united into one cavity, the cloacalchamber. This is brought about by the fact thatthe gills extend posteriorly beyond their attachment to the body at their base, orrather, that this attachment (ctenidium) does not extend to the posterior end ofthe body (See fig. 5). This attachment, the common base of the two primarylimbs of the gills on each side, runs backward to a point, which generally liesabout midway between the posterio
RMMABEJF–. Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . a b a Senkrechter Schnitt durch die rudimentäre Kieme a von Patella vulgata. b Das Geruchsepithel, c Das Geruchs- ganglion, h Das Ctenidium in durchscheinendem Lichte, von oben gesehen. (Nach Kay Lankester.) Im Nacken liegen zwei kleine ovale Vorsprünge (Fig. 24), Sie sind im Innern cavernös. Ein niedriger Epithelwulst an ihrer Seite ist nervöser Natur und hat das Geriichsganglion unter sich (Fig. 25). Die Deutung
RMRG3GX9–. The Cambridge natural history. Zoology; Zoologia Geral. CLASSIFICATION OF GASTEROPODA present, is never spiral, but consists of eight overlapping plates, kept together by an elliptical girdle. The Amphineura are divided into (a) Polyflacoi^liora^ or Chitons, and (5) Aplaeophora (^Chaetoderma and Neomenid). (2) The Prosohrayicliiata'^ are so named from the fact that the breathing organ (branchia or ctenidium-^) is as a rule situated in front of the heart, the auricle at the same time being in front of the ventricle. They are asymmetrical, almost always fur- nished with a shell, which is at so
RMMABCH8–. Dr. H. G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . st. Ctenidium von Pleurotomaria Beyriehi. A Querschnitt durch die Kieme (Ehachis mit zwei Blättern). B Querschnitt durch zwei Kiemenblättchen. C Der zuführende Abschnitt eines solchen stärker vergr. D Quer- schnitt durch die Kiemenblättchen auf der Seite des zuführenden Gefässes. af Ab- führendes Kiemengefäss. Im Längsmusculatur. ma Mantel, n Nervenlager, pf Stütz- pfeiler im Kiemenblättchen. st Stützendes Kiemenstäbchen auf der Seite des zuführenden Gefässes. zf Zuführendes Kiemengefäs
RMRE08WW–. A manual of zoology. Zoology. MOLLUSCA. Sub Order II. PTEROPODA. Pelagic forms which in most points of structure agree with the Teetibranchs. The head and usually eyes and tentacles are lacking, while the fins (in reality greatly developed para- podia) are highly characteristic, giving the name ' wing-footed' to these forms. Like the Teetibranchs they are hermaphroditic, orthoneurous, have a single ctenidium and a posterior auricle. The THECASOMATA. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe
RMMABCH7–. Dr. H. G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . Gefässsystem von Päludina vivipara. 1 Auge. 2 Cerebralganglion. 3 abführendes Kiemengefäss (Kiemenvene). 4 Kieme (Ctenidium). 5 zuführendes Kiemengefäss. 6 Nephridium. 7 Aorta visceralis. 8 Herz- kammer. 9 Vorhof. 10 Aorta cephalica. 11 Venöse Sinus. 12 Otocyste. 13 Pedal- ganglion. Nach Leydig. Die Trochiden. Für Turbo und Trochus sind die Verhältnisse, wie sie zuerst Quoy und Gaimard bei Turbo marmoratus beschrieben, inzwischen durch Haller (1407, 1411), Perrier (1463), Grobben (125)
RMRHKTT7–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PARTICLE SORTING IN THE OYSTER 5 masses are invariably carried to the free margins. Mucus entering the terminal grooves to reach the mouth must perform a turn of around 180°. The thick layers of mucus are unable to do this and fall off the ctenidium onto the inner mantle margins where they are rejected as pseudofeces; this separation of unwanted mucus is aided by the activity of the lateral groove cilia. It is highly probable then that two distinct mucus types are concerned with the entrapment and rejection of particles whil
RMMABEB1–. Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . Gefässsystem von Paludina vivipara. 1 Auge. 2 Cerebralganglion. 3 abführendes Kieniengefäss (Kiemenvene). 4 Kieme (Ctenidium). 5 zuführendes Kieniengefäss. 6 Nephridium. 7 Aorta visceralis. S Herz- kammer. 9 Vorhof. 10 Aorta cephalica. 11 Venöse Sinus. 12 Otocyste. 13 Pedal- ganglion. Nach Leydig. Die Trochiden. Für Turbo und TrocJms sind die Verhältnisse, wie sie zuerst Quoy und Gaimard bei Turho .marmoratus beschrieben, inzwischen durch Haller (1407, 1411), Perrier (1463), Grobben (125
![. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 322 INVERTEBRATE MORPHOLOGY. u priori grounds seems improbable ; but there seems to be no good reason, if the aquatic forms are derived directly from marine ancestors, why their ctenidia should have become replaced by a lung, since in the aquatic Pro- sobranch Paladina the ctenidium is still retained. On the other hand, it may be again mentioned that the terrestrial Prosobranchs such as Cydu- stoma, Acicula, etc., have lost their ctenidium and resemble a Pulmonale in th Stock Photo](https://c8.alamy.com/comp/REP41P/a-textbook-of-invertebrate-morphology-microform-invertebrates-morphology-animals-invertbrs-morphologie-animaux-322-invertebrate-morphology-u-priori-grounds-seems-improbable-but-there-seems-to-be-no-good-reason-if-the-aquatic-forms-are-derived-directly-from-marine-ancestors-why-their-ctenidia-should-have-become-replaced-by-a-lung-since-in-the-aquatic-pro-sobranch-paladina-the-ctenidium-is-still-retained-on-the-other-hand-it-may-be-again-mentioned-that-the-terrestrial-prosobranchs-such-as-cydu-stoma-acicula-etc-have-lost-their-ctenidium-and-resemble-a-pulmonale-in-th-REP41P.jpg ". A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 322 INVERTEBRATE MORPHOLOGY. u priori grounds seems improbable ; but there seems to be no good reason, if the aquatic forms are derived directly from marine ancestors, why their ctenidia should have become replaced by a lung, since in the aquatic Pro- sobranch Paladina the ctenidium is still retained. On the other hand, it may be again mentioned that the terrestrial Prosobranchs such as Cydu- stoma, Acicula, etc., have lost their ctenidium and resemble a Pulmonale in th Stock Photo")
RMREP41P–. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 322 INVERTEBRATE MORPHOLOGY. u priori grounds seems improbable ; but there seems to be no good reason, if the aquatic forms are derived directly from marine ancestors, why their ctenidia should have become replaced by a lung, since in the aquatic Pro- sobranch Paladina the ctenidium is still retained. On the other hand, it may be again mentioned that the terrestrial Prosobranchs such as Cydu- stoma, Acicula, etc., have lost their ctenidium and resemble a Pulmonale in th
RMMABF0P–. Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild . Sehern atischer UrmoUusk (nach Eay Lankester). A. Dorsale, B. ventrale Ansicht. C. Herz, Pericard, Gonaden und Nephriden in situ. D Nervensystem. E. Medianer Längsschnitt, wobei die Schale weggelassen ist. a Kopftentakel, b Kopf, c Mantel- rand, d Ursprungslinie des Mantels vom Eingeweidesack, e Fussrand. f Freier Eand der Schalendrüse. () Schale, h Osphradium (Geruchs- organ Spengel). ^ ctenidium (Kiemenfeder), h Geschlechtsöffnung. l Nierenporus. m After, n Schwanztheil des Fusses (hin
RMRHKTRR–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 6 F. R. BERNARD Both bacteria were retained and ingested when presented as pure cultures. If the total load (wet weight) exceeded 200 mg/liter, rejection occurred with pro- duction of bright purple pseudofaeces. With lighter loads no rejection was evident and ingestion occurred. If the Chromatium was not centrifuged out of the growing medium and washed, substantial to total rejection occurred, probably the'result of irritation to the ctenidium by traces of hydrogen sulphide. When mixed with Tetraselma ingestion followed, but
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BIOLOGY OF TRICHOTROPIS 167 through the mantle cavity." But in T. canccllata, of which many hundreds of specimens were observed, there is certainly no evidence that the proboscis is ever in a position to take in any material other than what is passed to it in current B from the ctenidium by way of the floor of the mantle cavity. The position of the osphradium in relation to the three currents will be noted. Like the ctenidium, this organ is enlarged, and surely because of the increased current produced and so greater en Stock Photo](https://c8.alamy.com/comp/RHMN09/the-biological-bulletin-biology-zoology-biology-marine-biology-biology-of-trichotropis-167-through-the-mantle-cavityquot-but-in-t-canccllata-of-which-many-hundreds-of-specimens-were-observed-there-is-certainly-no-evidence-that-the-proboscis-is-ever-in-a-position-to-take-in-any-material-other-than-what-is-passed-to-it-in-current-b-from-the-ctenidium-by-way-of-the-floor-of-the-mantle-cavity-the-position-of-the-osphradium-in-relation-to-the-three-currents-will-be-noted-like-the-ctenidium-this-organ-is-enlarged-and-surely-because-of-the-increased-current-produced-and-so-greater-en-RHMN09.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BIOLOGY OF TRICHOTROPIS 167 through the mantle cavity." But in T. canccllata, of which many hundreds of specimens were observed, there is certainly no evidence that the proboscis is ever in a position to take in any material other than what is passed to it in current B from the ctenidium by way of the floor of the mantle cavity. The position of the osphradium in relation to the three currents will be noted. Like the ctenidium, this organ is enlarged, and surely because of the increased current produced and so greater en Stock Photo")
RMRHMN09–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BIOLOGY OF TRICHOTROPIS 167 through the mantle cavity." But in T. canccllata, of which many hundreds of specimens were observed, there is certainly no evidence that the proboscis is ever in a position to take in any material other than what is passed to it in current B from the ctenidium by way of the floor of the mantle cavity. The position of the osphradium in relation to the three currents will be noted. Like the ctenidium, this organ is enlarged, and surely because of the increased current produced and so greater en
RMRDJFEB–. A manual of zoology. Zoology. IV. GASTEROPODA: PULMONATA 335 The head and usually eyes and tentacles are lacking, while the fins (greatly developed parapodia) are highly characteristic, giving the name 'wing-footed' to these forms. They have rarely a single ctenidium. The THECASOMATA have shells, Limacinid^, Hyaleid/E- The shells of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Hertwig, Richard, 1850-1937; Kingsley, J.
RMRHN8AE–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 4 F. R. BERNARD This gravimetric mechanism may be termed the preliminary sorting method, and observations undertaken upon several other bivalve families and genera show that it is probably universal among the ctenidial Bivalvia. It prevents the impinge- ment of mineral particles upon the delicate tissue of the ctenidium and it is probable that the greater proportion of inorganic material rejected in the pseudofeces has not been in contact with either the ctenidia or labial palpi, but settled directly upon the inhalant chambe
RMRHKTJG–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 5. Photomicrograph of unstained cryostat section of the ctenidium of Phacoidex pectinahis taken without a filter in the optical system. The color of the dark masses was yellow-brown.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 19
RMRHM4XF–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. mm Figure 1. SEM of the anterior portion of the osphradium (Os) showing its relation to the ctenidium (Ct) and incurrent siphon (S). Me-mantle epithehum; R-raphe.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank R
RMRHKJC2–. The Biological bulletin. Biology; Zoology; Marine biology. GILL DEVELOPMENT IN MYTILUS. 67 ranged accurately in serial order. In Fig. 4 are seen isolated portions from the posterior end of the ctenidium. The speci- mens figured are selected from a large number of dissections, and are taken from several individuals of slighty varying size. Hence the discrepancy in the size of the figures, as all are equally magnified. All the stages figured have been observed again and again. From the figures it is clearly seen that we are dealing with something very different from the comparatively long and
RMRGFKDH–. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. -A/entricle -Auricle Ctenidium Anus A. Primitive Isopleuran (left side view) Stomach Ventricle —Auricle. B. Primitive Anisopleuran (right side view) Reconstructions from Knight (1952). Fig. 2. Schematic reconstructions of two gastropods. The introduction of the phenomenon of torsion gave rise to the Anisopleura with greatly increased motility and a newly important problem of sanitation. Figure 2A represents the left side of a primitive monoplacophoran restored with an organiza- tion similar to that of a chiton, shown
RMRHKTN5–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 1. Phacoidcs pcctinatus Gmelin. Length 5 cm. Dorsal side uppermost. The large dark mass shown by the dissected animal is the right ctenidium; the dark color is due to hemoglobin. Note the colorless edge of the demibranch, which is an indication of the hemoglobin- free, ciliated cells of the exterior of the gill. Members of the family Lucinidae have only the outer demibranch (Purchon, 1939). Absorption spectra Centrifuged homogenates of ctenidia, in phosphate buffers ranging in pH from 6.8 to 7.5 and molarity from 0.06
RMRHMN0H–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 164 C. M. YONGE in Capulus itngaricus (Yonge, 1938), the mouth lies at the end of a short grooved suboral proboscis. Powerful ciliary tracts coming from the floor of the mantle cavity extend round the right side of the head and carry particles to the proboscis (Figs. 2 and 3). This curls under and may move to one side or the other but certainly not invariably to the right as Graham states occurs in T. borealis. Without further evidence from the ctenidium, it was immediately possible to confirm Graham's statement that species
![. Elementary text-book of zoology [electronic resource]. Zoology. Ctenidium. | Auricle. Posterioi Aorta. Mantle Cavity. In its natural position, the cuttle rests suspended in the water near the surface with the body horizontal, the tentacles Motor l^s-nging loosely downwards, the two long ones being coiled up inside the others. A forward swimming motion is caused by undulations of the two lateral fins. A powerful backward jerk is produced by forcible ejection of water through the siphon. There are special muscles for moving the tentacles and the eyes. Fig. 196.—Ventral View of Shell of Cuttle. Stock Photo](https://c8.alamy.com/comp/RJNAP3/elementary-text-book-of-zoology-electronic-resource-zoology-ctenidium-auricle-posterioi-aorta-mantle-cavity-in-its-natural-position-the-cuttle-rests-suspended-in-the-water-near-the-surface-with-the-body-horizontal-the-tentacles-motor-ls-nging-loosely-downwards-the-two-long-ones-being-coiled-up-inside-the-others-a-forward-swimming-motion-is-caused-by-undulations-of-the-two-lateral-fins-a-powerful-backward-jerk-is-produced-by-forcible-ejection-of-water-through-the-siphon-there-are-special-muscles-for-moving-the-tentacles-and-the-eyes-fig-196ventral-view-of-shell-of-cuttle-RJNAP3.jpg ". Elementary text-book of zoology [electronic resource]. Zoology. Ctenidium. | Auricle. Posterioi Aorta. Mantle Cavity. In its natural position, the cuttle rests suspended in the water near the surface with the body horizontal, the tentacles Motor l^s-nging loosely downwards, the two long ones being coiled up inside the others. A forward swimming motion is caused by undulations of the two lateral fins. A powerful backward jerk is produced by forcible ejection of water through the siphon. There are special muscles for moving the tentacles and the eyes. Fig. 196.—Ventral View of Shell of Cuttle. Stock Photo")
RMRJNAP3–. Elementary text-book of zoology [electronic resource]. Zoology. Ctenidium. | Auricle. Posterioi Aorta. Mantle Cavity. In its natural position, the cuttle rests suspended in the water near the surface with the body horizontal, the tentacles Motor l^s-nging loosely downwards, the two long ones being coiled up inside the others. A forward swimming motion is caused by undulations of the two lateral fins. A powerful backward jerk is produced by forcible ejection of water through the siphon. There are special muscles for moving the tentacles and the eyes. Fig. 196.—Ventral View of Shell of Cuttle.
RMRH156T–. Bulletin. Natural history; Natuurlijke historie. 20 PEABODY MUSEUM BULLETIN 41. 1 mm. Fig. 5. Diagrammatic section through the ctenidium oiGastrochaena (Gastrochaena) hians: transverse section through the middle of the siphon. The directions of the inhalant and exhalant currents are indicated by the lower and upper arrows, respectively. Legend: O. Outer demibranch. /. Inner demibranch. S. Ctenidial septum. The inhalant siphon of S. rostrata and G. (R.) ovata differs from G. (G.) hians in having a transverse valve across its base. Similar valves have been described for 5. mytiloides by Pelsen
RMRHKTH4–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 614 KENNETH k. H. READ 100/1 -. loq/u FIGURE 7a. Photomicrograph of section of gill stained for occult iron, taken with no filter in the optical system. Note the dense mats of cilia of the ciliated cells of the surface of the ctenidium.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological La
![. Elementary text-book of zoology [electronic resource]. Zoology. SEPIA. 279 into the stomach, in which it is mixed with the digestive juices from the digestive gland and pancreatic coeca. It may be noticed that the anus is not at the hind end of the body, but the intestine is bent forwards along the under surface till the whole alimentary canal is U-shaped, with a ventral flexure. Fig. 195.—Dissection of Organs of Sepia Officinalis from THE Left Side. {Ad. nat.) Semi-diagrammatic. Oesophagus Anterior v.orta. Buccal Mass. Buccal Glands Intestine. Digestive Gland. CO. Ctenidium. | Auricle. P Stock Photo](https://c8.alamy.com/comp/RJNAR1/elementary-text-book-of-zoology-electronic-resource-zoology-sepia-279-into-the-stomach-in-which-it-is-mixed-with-the-digestive-juices-from-the-digestive-gland-and-pancreatic-coeca-it-may-be-noticed-that-the-anus-is-not-at-the-hind-end-of-the-body-but-the-intestine-is-bent-forwards-along-the-under-surface-till-the-whole-alimentary-canal-is-u-shaped-with-a-ventral-flexure-fig-195dissection-of-organs-of-sepia-officinalis-from-the-left-side-ad-nat-semi-diagrammatic-oesophagus-anterior-vorta-buccal-mass-buccal-glands-intestine-digestive-gland-co-ctenidium-auricle-p-RJNAR1.jpg ". Elementary text-book of zoology [electronic resource]. Zoology. SEPIA. 279 into the stomach, in which it is mixed with the digestive juices from the digestive gland and pancreatic coeca. It may be noticed that the anus is not at the hind end of the body, but the intestine is bent forwards along the under surface till the whole alimentary canal is U-shaped, with a ventral flexure. Fig. 195.—Dissection of Organs of Sepia Officinalis from THE Left Side. {Ad. nat.) Semi-diagrammatic. Oesophagus Anterior v.orta. Buccal Mass. Buccal Glands Intestine. Digestive Gland. CO. Ctenidium. | Auricle. P Stock Photo")
RMRJNAR1–. Elementary text-book of zoology [electronic resource]. Zoology. SEPIA. 279 into the stomach, in which it is mixed with the digestive juices from the digestive gland and pancreatic coeca. It may be noticed that the anus is not at the hind end of the body, but the intestine is bent forwards along the under surface till the whole alimentary canal is U-shaped, with a ventral flexure. Fig. 195.—Dissection of Organs of Sepia Officinalis from THE Left Side. {Ad. nat.) Semi-diagrammatic. Oesophagus Anterior v.orta. Buccal Mass. Buccal Glands Intestine. Digestive Gland. CO. Ctenidium. | Auricle. P
RMRDH0BN–. Elementary text-book of zoology. SEPIA. 279 into the stomach, in which it is mixed with the digestive juices from the digestive gland and pancreatic caeca. It may be noticed that the anus is not at the hind end of the body, but the intestine is bent forwards along the under surface till the whole alimentary canal is U-shaped, with a ventral flexure. Fig. 197.—Dissection of Organs of Sepia Officinalis from THE Left Side. (Semi-diagrammatic.) {Ad nat.) CEsophagus, Anterior Aorta. | Buccal Mass. Buccal Glands. I Intestine. Digestive Gland.. Ctenidium. Auricle. Posterioi Aorta. Mantle'Cavity. In
RMRGDJRM–. Bulletin of the Natural History Museum Zoology. Fig. 5 Semidiagrammatic transverse section through the posterior exhalant area of C. australopilula showing the inverted exhalant tube and the connection of the ctenidium to the mantle. Abbreviations: cm - connection between mantle and ctenidium, ct - ctenidium, ea - exhalant aperture, iet - inverted exhalant tube, lm - longitudinal muscle, me - mantle edge, n - nerve.. Fig. 6 Geographical distribution of Cardiolucina australopilula new species. Cardiolucina civica (Yokoyama, 1927) Figs 7-9 Cardium civica Yokoyama, 1927: 179. pi. 48, figs 3 &am
RMRGDJTC–. Bulletin of the Natural History Museum Zoology. erne Fig. 4 Cardiolucina australopilula anatomy. Right mantle and ctenidium removed. Abbreviations aa - anterior adductor muscle, cme - cut mantle edge, exa - exhalant aperture, ext - exhalant tube, fct - fused ctenidium to mantle, ft - foot, let - left ctenidium, Ip - labial palps, me - mantle edge, pa - posterior adductor muscle, ppr - posterior pedal retractor muscle, r - rectum, vl - visceral lobe.. Fig. 5 Semidiagrammatic transverse section through the posterior exhalant area of C. australopilula showing the inverted exhalant tube and the
RMRHKJA5–. The Biological bulletin. Biology; Zoology; Marine biology. 7o EDWARD L. RICE. mantle (outer gill) or body (inner gill). In the later type of de- velopment the upper end of the reflexed limb is primarily united with the gill axis (Fig. 4, D), and only secondarily attains its freedom. The details of the process have not been studied. In the specimen represented in Fig. 4, E, this separation had not taken place, but the reflexed limbs were torn loose in the dis- section as indicated by the rough edges.. Fig. 5. Section through ctenidium of Mytilus of 1.6 mm. length. Section passes through poste
![. Elementary text-book of zoology [electronic resource]. Zoology. 278 MOLLUSC A. Fig. 194.—Ventral View of Sepia Officinalis with Mantle Cavity Cut Open. {Ad. nat.) Siphon.. Facet. Ctenidium. Genital Aperture. Ink Gland. Alimentary. The mouth leads through the jaws into a buccal chamber which contains a rasping odo?itophore of essentially the same nature as that of the snail. A duct from a pair of salivary glands opens into the buccal chamber. The oesophagus leads back some way to the stomachy a large rounded sac. From close to the junction of stomach and oesophagus the intestine passes forwar Stock Photo](https://c8.alamy.com/comp/RJNARM/elementary-text-book-of-zoology-electronic-resource-zoology-278-mollusc-a-fig-194ventral-view-of-sepia-officinalis-with-mantle-cavity-cut-open-ad-nat-siphon-facet-ctenidium-genital-aperture-ink-gland-alimentary-the-mouth-leads-through-the-jaws-into-a-buccal-chamber-which-contains-a-rasping-odoitophore-of-essentially-the-same-nature-as-that-of-the-snail-a-duct-from-a-pair-of-salivary-glands-opens-into-the-buccal-chamber-the-oesophagus-leads-back-some-way-to-the-stomachy-a-large-rounded-sac-from-close-to-the-junction-of-stomach-and-oesophagus-the-intestine-passes-forwar-RJNARM.jpg ". Elementary text-book of zoology [electronic resource]. Zoology. 278 MOLLUSC A. Fig. 194.—Ventral View of Sepia Officinalis with Mantle Cavity Cut Open. {Ad. nat.) Siphon.. Facet. Ctenidium. Genital Aperture. Ink Gland. Alimentary. The mouth leads through the jaws into a buccal chamber which contains a rasping odo?itophore of essentially the same nature as that of the snail. A duct from a pair of salivary glands opens into the buccal chamber. The oesophagus leads back some way to the stomachy a large rounded sac. From close to the junction of stomach and oesophagus the intestine passes forwar Stock Photo")
RMRJNARM–. Elementary text-book of zoology [electronic resource]. Zoology. 278 MOLLUSC A. Fig. 194.—Ventral View of Sepia Officinalis with Mantle Cavity Cut Open. {Ad. nat.) Siphon.. Facet. Ctenidium. Genital Aperture. Ink Gland. Alimentary. The mouth leads through the jaws into a buccal chamber which contains a rasping odo?itophore of essentially the same nature as that of the snail. A duct from a pair of salivary glands opens into the buccal chamber. The oesophagus leads back some way to the stomachy a large rounded sac. From close to the junction of stomach and oesophagus the intestine passes forwar
RMRHNT81–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 110 C. F. LIM. FIGURES. Anadara antiquata (L.)- A. Transverse section of gill filament. B. Transverse section through transverse fold of labial palp. C. Ciliary currents of the left labial palp. D. Currents on two adjacent folds of labial palp (diagrammatic). E. Currents on ctenidium and adjacent areas. F. Currents on the foot and visceral mass. G. Currents on the left mantle lobe.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. cm Figure 1. Ifremeria nautilei. Anatomy of the mantle cavity and the ctenidium to show the dimension and location of the ctenidium. The shell has been removed, the mantle cavity partly opened, and in "f" the basal attached part of the filaments dissected from mantle, a, anus; cm. columellar muscle; f, gill filaments; f. gill filaments inside the mantle cavity; fo. foot: g. gill; hg. hypobranchial gland; mf, mantle fringe; op, operculum; os, osphradium; r, rectum; sn, snout. Scale 10 mm (after Beck, 1991. modified) Stock Photo](https://c8.alamy.com/comp/RHKKFP/the-biological-bulletin-biology-zoology-biology-marine-biology-cm-figure-1-ifremeria-nautilei-anatomy-of-the-mantle-cavity-and-the-ctenidium-to-show-the-dimension-and-location-of-the-ctenidium-the-shell-has-been-removed-the-mantle-cavity-partly-opened-and-in-quotfquot-the-basal-attached-part-of-the-filaments-dissected-from-mantle-a-anus-cm-columellar-muscle-f-gill-filaments-f-gill-filaments-inside-the-mantle-cavity-fo-foot-g-gill-hg-hypobranchial-gland-mf-mantle-fringe-op-operculum-os-osphradium-r-rectum-sn-snout-scale-10-mm-after-beck-1991-modified-RHKKFP.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. cm Figure 1. Ifremeria nautilei. Anatomy of the mantle cavity and the ctenidium to show the dimension and location of the ctenidium. The shell has been removed, the mantle cavity partly opened, and in "f" the basal attached part of the filaments dissected from mantle, a, anus; cm. columellar muscle; f, gill filaments; f. gill filaments inside the mantle cavity; fo. foot: g. gill; hg. hypobranchial gland; mf, mantle fringe; op, operculum; os, osphradium; r, rectum; sn, snout. Scale 10 mm (after Beck, 1991. modified) Stock Photo")
RMRHKKFP–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. cm Figure 1. Ifremeria nautilei. Anatomy of the mantle cavity and the ctenidium to show the dimension and location of the ctenidium. The shell has been removed, the mantle cavity partly opened, and in "f" the basal attached part of the filaments dissected from mantle, a, anus; cm. columellar muscle; f, gill filaments; f. gill filaments inside the mantle cavity; fo. foot: g. gill; hg. hypobranchial gland; mf, mantle fringe; op, operculum; os, osphradium; r, rectum; sn, snout. Scale 10 mm (after Beck, 1991. modified)
RMRGD290–. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Thorax. Abdomex, and Legs: Pronotal ctenidium as in female; first abdominal tergite with eight small teeth; three ante- pygidial bristles, the middle two-thirds longer than the sub- equal outer and inner; eighth tergite reduced; clasper large, roughly triangular, with one long seta midway along its upper, straight edge, the base of the finger cutting short its posterior angle; finger thumb-like, slender, with two small spiniforms on its upper posterior angle; sternite IX conspicuous, cleaver-s
![. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE MOLLUSC A. 277 of the body there is a special thickening of the muscle-tissue to form a " foot" (Fig. 122, p which assumes a great variety of forms, and special muscles are developed for its protrac-. Fig. 122.—Diagrams showing the Arrangement of the Organs in an Ideal Mollusk (after lankestek). a = tentacle. i = ctenidium. b = head. c = niargiu of mantle d = margin of shell. e = edge of body. / = edge of shell depression. g = shell. gc = cei-ebral gangl Stock Photo](https://c8.alamy.com/comp/RJ4NPA/a-textbook-of-invertebrate-morphology-microform-invertebrates-morphology-animals-invertbrs-morphologie-animaux-type-mollusc-a-277-of-the-body-there-is-a-special-thickening-of-the-muscle-tissue-to-form-a-quot-footquot-fig-122-p-which-assumes-a-great-variety-of-forms-and-special-muscles-are-developed-for-its-protrac-fig-122diagrams-showing-the-arrangement-of-the-organs-in-an-ideal-mollusk-after-lankestek-a-=-tentacle-i-=-ctenidium-b-=-head-c-=-niargiu-of-mantle-d-=-margin-of-shell-e-=-edge-of-body-=-edge-of-shell-depression-g-=-shell-gc-=-cei-ebral-gangl-RJ4NPA.jpg ". A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE MOLLUSC A. 277 of the body there is a special thickening of the muscle-tissue to form a " foot" (Fig. 122, p which assumes a great variety of forms, and special muscles are developed for its protrac-. Fig. 122.—Diagrams showing the Arrangement of the Organs in an Ideal Mollusk (after lankestek). a = tentacle. i = ctenidium. b = head. c = niargiu of mantle d = margin of shell. e = edge of body. / = edge of shell depression. g = shell. gc = cei-ebral gangl Stock Photo")
RMRJ4NPA–. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE MOLLUSC A. 277 of the body there is a special thickening of the muscle-tissue to form a " foot" (Fig. 122, p which assumes a great variety of forms, and special muscles are developed for its protrac-. Fig. 122.—Diagrams showing the Arrangement of the Organs in an Ideal Mollusk (after lankestek). a = tentacle. i = ctenidium. b = head. c = niargiu of mantle d = margin of shell. e = edge of body. / = edge of shell depression. g = shell. gc = cei-ebral gangl
RMRGDJTX–. Bulletin of the Natural History Museum Zoology. ANATOMY AND SYSTEMATICS OF CARDIOLUCINA 99. erne Fig. 4 Cardiolucina australopilula anatomy. Right mantle and ctenidium removed. Abbreviations aa - anterior adductor muscle, cme - cut mantle edge, exa - exhalant aperture, ext - exhalant tube, fct - fused ctenidium to mantle, ft - foot, let - left ctenidium, Ip - labial palps, me - mantle edge, pa - posterior adductor muscle, ppr - posterior pedal retractor muscle, r - rectum, vl - visceral lobe.. Please note that these images are extracted from scanned page images that may have been digitally e
RMRHM9GE–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PARASITISM IN TR1CHOTROPIS 353 two calyptraeids (P < 0.00 h Fig. 2). Relative growth rates of ctenidia, as indicated by the slopes of regressions of ctenidium area on body mass for T. cancellata and the two calpyptraeids. were not significantly different (0.1 < P < 0.2). Importance of parasitism to growth, survival, and reproduction Experimental snails behaved similarly to other T. can- cellata observed in the laboratory. In particular, those raised with live hosts moved to the openings of host tubes within a few da
RMRHKJCE–. The Biological bulletin. Biology; Zoology; Marine biology. 66 EDWARD L. RICE. mode. The change may be noticed in specimens but a little older than the latest stage figured by Lacaze-Duthiers. The ctenidium has grown beyond the rather small body mass and the posterior adductor, and extends free into the mantle chamber (Fig i). The posterior part of the ctenidium is free from the mantle except for a light attachment due to the interlocking of. Fig. i. Posterior tip of ctenidium of Mytilus of 2.5 mm. length, viewed from in- ner side. Outer gill omitted except for outline represented by dotted l
RMRG7RDB–. Bulletin - United States National Museum. Science. 240 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM hypomera sometimes feebly lobed behind the coxae; anterior coxal cavities entirely open behind, confluent; front coxae large, exserted; middle coxal cavities confluent; posterior coxae contiguous, coni- cal; first and second abdominal sternites absent; seventh st^ernite of male sometimes slightly emarginate and with a ctenidium along pos- terior margin; eighth sternite of male emarginate.. Figure 1.—Apical abdominal sternites of males of Lithockaris: A, L. dorsalis Erichsonj B, L. secunda, new
RMRE08XF–. A manual of zoology. Zoology. Fifi. 37a. Fio. :)r3. Fig. .372. âF^issMrcffct padigoiiica, ventral view. (From Broun.) /»â , the paired gills; )), foot. Fio. 373.âAcm(jio testudinalia, limpet. (From Binnuy-Uoiild.) one or no ctenidium ; intestine not passing through heart, shell conical. AcMTEiD^ with ctenidium. Acma'a * (fig. 373). Patellid.e, ctenidia lacking, replaced by a ring-like mantle gill. Patella (fig. 363, ^4). ZYGO-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illus
![. A text-book of invertebrate morphology. Invertebrates. TYPE M0LLU8CA. 277 of the body there is a special thickening of the muscle-tissue to form a "foot" (Fig. 122, p), which assumes a great'variety of forms, and special muscles are developed for its protrac-. FiQ. 123. gpe P zl ^ 7 Diagrams showing the Abbangement of the Organs in an . Ideal MolLUSK (after Lankestek). a = tentacle. i = ctenidium. ft = head. k = reproductive pore. c = margin of mantle I = nephridial pore. d = margin of shell. m = anus. e = edge of body. n and p —• foot. /= edge of shell depression. r = coelom. g = Stock Photo](https://c8.alamy.com/comp/RDW5JE/a-text-book-of-invertebrate-morphology-invertebrates-type-m0llu8ca-277-of-the-body-there-is-a-special-thickening-of-the-muscle-tissue-to-form-a-quotfootquot-fig-122-p-which-assumes-a-greatvariety-of-forms-and-special-muscles-are-developed-for-its-protrac-fiq-123-gpe-p-zl-7-diagrams-showing-the-abbangement-of-the-organs-in-an-ideal-mollusk-after-lankestek-a-=-tentacle-i-=-ctenidium-ft-=-head-k-=-reproductive-pore-c-=-margin-of-mantle-i-=-nephridial-pore-d-=-margin-of-shell-m-=-anus-e-=-edge-of-body-n-and-p-foot-=-edge-of-shell-depression-r-=-coelom-g-=-RDW5JE.jpg ". A text-book of invertebrate morphology. Invertebrates. TYPE M0LLU8CA. 277 of the body there is a special thickening of the muscle-tissue to form a "foot" (Fig. 122, p), which assumes a great'variety of forms, and special muscles are developed for its protrac-. FiQ. 123. gpe P zl ^ 7 Diagrams showing the Abbangement of the Organs in an . Ideal MolLUSK (after Lankestek). a = tentacle. i = ctenidium. ft = head. k = reproductive pore. c = margin of mantle I = nephridial pore. d = margin of shell. m = anus. e = edge of body. n and p —• foot. /= edge of shell depression. r = coelom. g = Stock Photo")
RMRDW5JE–. A text-book of invertebrate morphology. Invertebrates. TYPE M0LLU8CA. 277 of the body there is a special thickening of the muscle-tissue to form a "foot" (Fig. 122, p), which assumes a great'variety of forms, and special muscles are developed for its protrac-. FiQ. 123. gpe P zl ^ 7 Diagrams showing the Abbangement of the Organs in an . Ideal MolLUSK (after Lankestek). a = tentacle. i = ctenidium. ft = head. k = reproductive pore. c = margin of mantle I = nephridial pore. d = margin of shell. m = anus. e = edge of body. n and p —• foot. /= edge of shell depression. r = coelom. g =
RMRHNT79–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FEEDING MECHANISMS OF ANADARA 111 CFC. LM FIGURE 4. Anadara anomala (Rve.). A. Transverse section of gill filament. B. Trans- verse section through transverse fold of labial palp. C. Ciliary currents of the left labial palp. D. Currents on two adjacent folds of labial palp (diagrammatic). E. Currents on ctenidium and adjacent areas. F. Currents on the foot and visceral mass. G. Currents on the left mantle lobe.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for rea
![. Elementary text-book of zoology [electronic resource]. Zoology. 272 MOLLUSC A. On either side of the foot there hang the gill-lamellcE, or ctenidia. These are four plates or lamellae on each side, Re "r t formed in each case by a gill-plate folded in itself, the outer gill-plate outwards and the inner inwards. The gill-plates are themselves composed of a num- ber of gill-JHatnerits, which hang perpendicularly in a single row from a horizontal axis, which is fused with the body- wall.. A ctenidium, therefore, consists of a medium axis with two rows of gill-filaments, each row forming a g Stock Photo](https://c8.alamy.com/comp/RJNAY0/elementary-text-book-of-zoology-electronic-resource-zoology-272-mollusc-a-on-either-side-of-the-foot-there-hang-the-gill-lamellce-or-ctenidia-these-are-four-plates-or-lamellae-on-each-side-re-quotr-t-formed-in-each-case-by-a-gill-plate-folded-in-itself-the-outer-gill-plate-outwards-and-the-inner-inwards-the-gill-plates-are-themselves-composed-of-a-num-ber-of-gill-jhatnerits-which-hang-perpendicularly-in-a-single-row-from-a-horizontal-axis-which-is-fused-with-the-body-wall-a-ctenidium-therefore-consists-of-a-medium-axis-with-two-rows-of-gill-filaments-each-row-forming-a-g-RJNAY0.jpg ". Elementary text-book of zoology [electronic resource]. Zoology. 272 MOLLUSC A. On either side of the foot there hang the gill-lamellcE, or ctenidia. These are four plates or lamellae on each side, Re "r t formed in each case by a gill-plate folded in itself, the outer gill-plate outwards and the inner inwards. The gill-plates are themselves composed of a num- ber of gill-JHatnerits, which hang perpendicularly in a single row from a horizontal axis, which is fused with the body- wall.. A ctenidium, therefore, consists of a medium axis with two rows of gill-filaments, each row forming a g Stock Photo")
RMRJNAY0–. Elementary text-book of zoology [electronic resource]. Zoology. 272 MOLLUSC A. On either side of the foot there hang the gill-lamellcE, or ctenidia. These are four plates or lamellae on each side, Re "r t formed in each case by a gill-plate folded in itself, the outer gill-plate outwards and the inner inwards. The gill-plates are themselves composed of a num- ber of gill-JHatnerits, which hang perpendicularly in a single row from a horizontal axis, which is fused with the body- wall.. A ctenidium, therefore, consists of a medium axis with two rows of gill-filaments, each row forming a g
RMRN79NA–. The anatomy of Lottia gigantea Gray. Acmaeidae; Lottia gigantea Gray. gzLZ*-^ —-- Fig. B. A cross section taken about the middle of the body to show the course of the muscle fibres of the shell muscle, and the disposition of gland cells in sole. Gl mucous cells in sole, Gn gonad, Med. 8 median blood sinus, L liver, R. K right kidney, R. K' that portion on left side of the body, Y, Y' point where blood vessels of gonad pass into membrane between gonad and right kidney, Z, Z' ventral line of at- tachment of this membrane. larger, is in front of the base of the ctenidium, while the right oc-
RMRHNT6J–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 112 C. F. LIM. LM FIGURE 5. Anadara cuneata (Rve.). A. Transverse section of gill filament. B. Trans- verse section through transverse fold of labial palp. C. Ciliary currents of the left labial palp. D. Currents on two adjacent folds of labial palp (diagrammatic). E. Currents on ctenidium and adjacent areas. F. Currents on the foot and visceral mass. G. Currents on the left mantle lobe.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration an
RMRGDJAH–. Bulletin of the Natural History Museum Zoology. 112 J.D. TAYLOR AND E.A. GLOVER. Fig. 22 Cardiolucina semperiana (Issel, 1869), Sinai Coast, Gulf of Suez, Egypt. NMW 1982.068. a, interior of right valve showing thick inner demibranch of the ctenidium and cylindrical, vermiform foot; b, right valve showing pronounced visceral pouch and the foot with strongly corrugated surface and small, rounded heel; c, section showing broad gill filaments and transverse muscle strands crossing the spaces within the filaments, d, bacteriocyte zone with ovoid bacteria; e, labial palps (lp) and mouth (m); f, c
RMRHKJ9H–. The Biological bulletin. Biology; Zoology; Marine biology. Fig. 5. Section through ctenidium of Mytilus of 1.6 mm. length. Section passes through posterior end of reduced foot, a, filament of inner gill; b, filament of outer gill; c, mantle; d, intestine; e, foot. Magnification 140.. Fig. 6. Section through ctenid- ium of Mytilus of 1.6 mm. length. Section passes through middle of posterior adductor. a, filament of inner gill; b, filament of outer gill ; c, mantle; d, posterior adductor. Magnification 140. At first sight the two modes of filament formation seem fun- damentally distinct ; but
RMRETCFN–. Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild. Zoology. Historische Uobersieht. 71 Fig. 1.. Sehern atischer UrmoUusk (nach Eay Lankester). A. Dorsale, B. ventrale Ansicht. C. Herz, Pericard, Gonaden und Nephriden in situ. D Nervensystem. E. Medianer Längsschnitt, wobei die Schale weggelassen ist. a Kopftentakel, b Kopf, c Mantel- rand, d Ursprungslinie des Mantels vom Eingeweidesack, e Fussrand. f Freier Eand der Schalendrüse. () Schale, h Osphradium (Geruchs- organ Spengel). ^ ctenidium (Kiemenfeder), h Geschlechtsöffnung. l Nierenpo
RMREPKPR–. Dr. H. G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild. Zoology; Mollusks; Arthropoda; Insects. Entstehung der Gastropodenasymmetrie nach Lang. A. Ursprüngliche Lage. B. Günstigste Lage für die Respiration. C. Günstigste Lage für die Locoraotion. D. Daraus resultirende Mittellage. E. Die durch D. bewirkten Druckverhältnisse. Buchstaben in A—D.: a After, et Ctenidium. f Fuss. k Kopf, mh Mantelhöhle. o Mund, sm Schalenmuskel.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabil
RMRETAG2–. Dr. H.G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild. Zoology. C.. Entstehung der Gastropodenasymnietrie nach Lang. A. Ursprüngliche Lage. B. Gunstigste Lage für die Respiration. C. Günstigste Lage für die Locomotion. D. Daraus resultirende Mittellage. E. Die durch D. bewirkten Druckverhältnissc. Buchstaben in A-D.: «After, et Ctenidium. f Fuss. Ä; Kopf, w/i Mantelhöhle. 0 Mund, sm Schalenmuskel.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appear
RMRHKJAK–. The Biological bulletin. Biology; Zoology; Marine biology. Fig. 4. Isolated filament anlagen from posterior tip of ctenidium of Mytilus. In all cases, anlage of outer gill at right. A and B from specimen of 2.25 mm. length ; C from one of 2.00 mm. ; D from one of 2.30 mm.; E from another specimen of 2.25 mm. Magnification 140. two youngest stages represented (Figs. 4, A ; 4, B) the tissue is distinctly embryonic with no differentiation ; but in the three older stages (Figs. 4, C; 4, D ; 4, E) the ciliated epithelium is clearly distinguishable, and is located on both sides of the anlage, show
RMRD3W52–. Das Urogenitalsystem von Ampullaria gigas Spix. Gastropoda; Mollusks. VIKTOR SACHWATKIN Vorne, unmittelbar hinter dem Ctenidium (kb) findet sich der Vorder- lappen (nv), hinter diesem der Hinterlappen (nh) der Niere. Das was ich bei der makroskopischen Beschreibung als Lamellen bezeichnet habe, sind Gefässe (c, Fig. M), in welchen das Blut aus der Vena afferens zur Kieme, wie wir das weiter sehen werden, fliesst. An der Oberfläche des Hinter- lappens (nh), senkrecht zu ihr, sind zahlreiche kleine Gefässe gelegen. Tiefer, dem Lumen der Nierenkammer zu bilden sie grössere Gefässe, die schliess
RMREXE21–. Dr. H. G. Bronn's Klassen und Ordnungen des Thier-Reichs : wissenschaftlich dargestellt in Wort und Bild. Zoology; Mollusks; Arthropoda; Insects. Monotocardien: Ctenidium, 165 im Alloemeinen durch die ganze Länge der Mantelhöhle. Bei den Fig. 26. Siphonostomen beginnt sie vorn am proximalen Ende oder am Grunde des Siphos, so dass die Siphonalrinne das Wasser unmittelbar zu ihr hinbringt, während bei den Holostomen durch Contraction des Mantelrandes der breiteMan- telspalt meist geschlossen, aber gerade vor der Kinne ein rundliches Athemloch offen gehalten wird. Meist verläuft sie in einer an
RMRHN8TD–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ADAPTATIONS IN MALLEUS AND ISOGNOMON 379 EXPLANATION OF LETTERING A anus MI ABR anterior byssal retractor ML AD adductor N AE anterior extension of shell OBG AF accessory foot OCL AOL anterior outer ligament layer OF AOM epithelium secreting anterior outer P ligament PAR AU auricle PER BG byssal groove PC BN byssal notch PE By byssus PMC CT ctenidium POL E exhalant current POM F foot FL fusion layer PR I inhalant current R ICL inner calcareous layer RI IF inner fold of mantle margin IL inner ligament layer U LP labial palp V
RMRH18G2–. Bulletin. Natural history; Natuurlijke historie. SUPERFAMILY PATELLOIDEA 91. Text-figs. 107-112.—Comparison of patelloid gill types with shell-structure groups: dorsal view through transparent shell. Modified from Yonge (1947, 1960). Explanation of symbols: c, ctenidium; e, external pallial blood vessel; £, foot; h, head; p, pallial gills; s, shell margin. Text-fig. family Classification genus Shell-structure group 107 Acmaeidae Acmaea, Nomaeopelta 1. 2. 3. 4, 5, 15, 16 108 Acmaeidae Lottia 1 109 Acmaeidae Scurria, Nomaeopelta 3. 1 110 Patellidae Helcion, Cellana 6, 7, 12, 13, 14 111 Patelli
RMRHKF6C–. The Biological bulletin. Biology; Zoology; Marine biology. ADAPTATIONS IN MALLEUS AND ISOGNOMON 379 Explanation of Lettering A anus MI ABR anterior byssal retractor ML AD adductor N AE anterior extension of sliell OBG AF accessory foot OCL AOL anterior outer ligament layer OF AOM epithelium secreting anterior outer P ligament PAR AU auricle PBR BG byssal groove PC BN byssal notch PE By byssus PMC CT ctenidium POL E exhalant current POM F foot FL fusion layer PR I inhalant current R ICL inner calcareous layer RI IF inner fold of mantle margin IL inner ligament layer U LP labial palp V MF midd
RMRJCPN3–. chang jiang san jiao zhou ji lin jin di qu bao zi zhi wu zhi é¿æ±ä¸è§æ´²åé»è¿å°åºå-¢å-æ¤ç©å¿. botany. 201. æ¯å¶æ¢³èï¼å¾17â146ï¼) Ctenidium capillifolium (Mitt.) Broth. æ¤ç©ä½çº¤ç»ï¼æå¼±ï¼é»ç»¿è²æé»æ£ è²ï¼ç¥å ·å æ³½ãèååï¼ä¸è§åç¾½ç¶å æï¼åæç-ï¼æ°´å¹³æ¹å伸å±ãå¶ç´§å¯æ åï¼å¸¸åé°åç¶ä¸ååæï¼åºé¨è¾éèä¸ å»¶ï¼ç¨æ纵褶ï¼èå¶åºé¨éå¿èå½¢ï¼ä¸é¨ æ¥ç-ææ«éå½¢ï¼é¿çº¦2 mmï¼å®½çº¦1 mm, å¶ç¼å ·ç²é½¿ï¼ä¸-èäºï¼çç-ï¼å¶ä¸-é¨ç»è ç-é¿å½¢ï¼é¿25ã50tim,宽4ã5txmï¼æ åè§çªï¼è§é¨ç±æ¹å½¢æé¿æ¹å½¢ç»èç»æï¼ æå¶ä¸é¨åµå½¢ï¼ä¸é¨æç-é¿å°ï¼é¿1.5ã 2mm,宽0.5ã0.6mmãå¶ç¼å ·ç»é½¿ãé éå¼æ ªãè´æé¿2.5ã3.5cmãæ±è´åæ± ç¶ï¼å¼å½¢ï¼ä¸å¯¹ç§°ãè´å¸½å ·
Search Results for Ctenidium Stock Photos and Images (86)
Page 1 of 1