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Peristome teeth Stock Photos and Images
RMER55YA–Close up of Sea Urchin showing Mouth and Teeth - An example of the strange or weird food eaten by people around the world
RF2WR1BY2–In some mosses the opening of the capsule is surrounded by a set of teeth called peristome
RFT5TGC6–The open spore-case of a Moss, which has a peristome of 16 pairs of teeth, vintage line drawing or engraving illustration.
RMRDTJ2P–. Introduction to structural and systematic botany, and vegetable physiology. Botany. CRTPTOGAMOUS OK FLOWEKLESS PLANTS. 503 peristome), which are always some, multiple of four: those of the outer row are called teeth, of the inner, cilia. The spores which fill the cavity commonly appear like an impalpable greenish powder. The pedicel continued through the capsule forms the columella: en- larged under the capsule it sometimes forms an apophysis. The. calyptra separating early at its base is carried up on the apex of the capsule; if it splits on one side, it is hood-shaped or cuculliform, if no
RF2WHAG4X–Colorful Albany pitcher plant (Cephalotus follicularis) in natural habitat, Western Australia
RF2WGGA1C–Colorful Albany pitcher plant (Cephalotus follicularis) in natural habitat, Western Australia
RMPG05F6–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 220 MOSSES AND FERNS CHAP. The sporogonium of Tetraphis has a peristome of pecuHar structure, and not strictly comparable to that of any of the other Mosses. After the operculum falls off the tissue lying beneath splits into four pointed teeth, which, however, are not, as in Funaria, composed simply of the cell walls, but are masses of tissue. All the other higher Bryales, with the exception of the Polytrichacese, have the peristome of essentially the same struc- ture as that described for Fun
RMMAAXW4–. East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida . Fig. 13 Channelled suture in Busycon canaliculata The Aperture is the last portion formed and through which the animal emerges. It may be ROUND, NARROW, or another shape. Fig. 11m. Sometimes it is greatly con- tracted with folds or teeth which it would seem almost impossible for the animal to pass without injury (see Pedipes mirabilis, PI. 55, Fig. 8). The OUTER LIP is shown in Fig. Ilk, the round peristome in PI. 3S, Fig. 3. In describing th
RMC4K3JF–Close up of Sea Urchin showing Mouth and Teeth - An example of the strange or weird food eaten by people around the world
RM2CEHN9W–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. cullate.The last character I doubt, for Ihave compared Austins MusciAppalachian! No. 142 and do nothnd the calyptra materially differ-ent from that in apocarpn and coii-ferta^ which often splits more onone side. The peristome teeth inamhtvua are like those of cipocarparather than conferta. The basalleaf-cells of these three species arenot materially different, but Sul-liant seems to have figured themmore accurately. G. maritima Turn. is trulymaritime, being found onl
RMPG2MXR–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. BRYOPHTTA. 703 away the spores are ripe, and the columella, &c, have dried up and collapsed. The teeth of the peristome are exceedingly varied in pattern in the various genera of Mosses; typically there are two series of them forming an outer and an inner peri- stome (c/. fig. 397»), but they are differently thickened, fused, and divided, and one or even both series (e.g. Gymnostomwm), may be absent. They are very hygro- scopic, and their function will be alluded to later on when we are discussin
RF2G02Y0C–Cephalotus follicularis, the Western Australian pitcher plant, in natural habitat with flower stalks
RF2WHAGB9–Albany pitcher plant (Cephalotus follicularis), strong plant with flower stalk in natural habitat, Western Australia
RF2WHAGAR–Albany pitcher plant (Cephalotus follicularis), adult plant and seedling, in natural habitat, Western Australia
RM2CEHX0R–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. ationship to the Torliilacea, which is also shown in the peristomesof S^eiaiiia and Cemtodou. KEY TO THE GENERA 1. Leaf-cells papillose ; capsule not strumose 2. Leaf-cells smooth (except faintly so in some specimens of Ceralodon ) 5. 2. Peristome small, teeth narrow and undiided Rhahdozieisia. Peristome teeth dicranoid, i. e., bifid half way (except one rare species); capsule furrowed when dry .... Oncophorm. Peristome dicranoid ; capsule not furrowed Dichodoiilium.
RMPFKFW6–. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. or calyptra (c) which is shed at maturity. The capsule opens by means of a lid or operculum (o), and the ori- fice is usually guarded by one or two rows of teeth or a peristome. None of the Mosses are horticultural plants, al- though Sphagnum Moss is much used as a packing ma- terial and for holding moisture ab
RF2WHAG6D–Albany pitcher plant (Cephalotus follicularis), close-up of two pitchers, in natural habitat, Western Australia
![. Manual of the mosses of North America [microform]. Mosses; Mousses. Si/rrhopodon.] BRYACE/E. 185 arc'olate and papillosc-crenuhitc in the upper, carinate by the yellowish percurrent costa. — Coult. I5ot. ^Jaz. iv. 151. /St/r- rhopodon (?) crispus^ Aust. 1. c. ii. 109. 11 Au. Jacksonville, Florida (J. Donnell Sinith). 61. SYRRHOPODON, Schwaegr. (PI. 2.) Distinguished from Cafymjjeres by the eucnllato dimidiate calyptra, the peristome undeveloj)ed or composed of IG lanceo- late entire generally horizontal teeth, and the orifice of the cap- sule sometimes covered by a thin membrane {epiphraym). Stock Photo](https://c8.alamy.com/comp/RJ1DAD/manual-of-the-mosses-of-north-america-microform-mosses-mousses-sirrhopodon-bryacee-185-arcolate-and-papillosc-crenuhitc-in-the-upper-carinate-by-the-yellowish-percurrent-costa-coult-i5ot-jaz-iv-151-str-rhopodon-crispus-aust-1-c-ii-109-11-au-jacksonville-florida-j-donnell-sinith-61-syrrhopodon-schwaegr-pi-2-distinguished-from-cafymjjeres-by-the-eucnllato-dimidiate-calyptra-the-peristome-undevelojed-or-composed-of-ig-lanceo-late-entire-generally-horizontal-teeth-and-the-orifice-of-the-cap-sule-sometimes-covered-by-a-thin-membrane-epiphraym-RJ1DAD.jpg ". Manual of the mosses of North America [microform]. Mosses; Mousses. Si/rrhopodon.] BRYACE/E. 185 arc'olate and papillosc-crenuhitc in the upper, carinate by the yellowish percurrent costa. — Coult. I5ot. ^Jaz. iv. 151. /St/r- rhopodon (?) crispus^ Aust. 1. c. ii. 109. 11 Au. Jacksonville, Florida (J. Donnell Sinith). 61. SYRRHOPODON, Schwaegr. (PI. 2.) Distinguished from Cafymjjeres by the eucnllato dimidiate calyptra, the peristome undeveloj)ed or composed of IG lanceo- late entire generally horizontal teeth, and the orifice of the cap- sule sometimes covered by a thin membrane {epiphraym). Stock Photo")
RMRJ1DAD–. Manual of the mosses of North America [microform]. Mosses; Mousses. Si/rrhopodon.] BRYACE/E. 185 arc'olate and papillosc-crenuhitc in the upper, carinate by the yellowish percurrent costa. — Coult. I5ot. ^Jaz. iv. 151. /St/r- rhopodon (?) crispus^ Aust. 1. c. ii. 109. 11 Au. Jacksonville, Florida (J. Donnell Sinith). 61. SYRRHOPODON, Schwaegr. (PI. 2.) Distinguished from Cafymjjeres by the eucnllato dimidiate calyptra, the peristome undeveloj)ed or composed of IG lanceo- late entire generally horizontal teeth, and the orifice of the cap- sule sometimes covered by a thin membrane {epiphraym).
RMPG3WG2–. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. 32 MOSSES WITH A .HAND-LENS is lateral or terminal, exserted; peristome like that of Dicranum, with sixteen forked, highly colored teeth, which are often papillose above. The- peculiar structure of the leaf has been explained in several ways, but the explanation given by Robert Brown in igig has recently been verified by the studies of Mr. E. S. Salmon. According to this theory the clasping portion of the leaf represents the original leaf, while t
RF2WHAG58–Albany pitcher plant (Cephalotus follicularis) with flower stalks in natural habitat, Western Australia
RM2CEG614–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. wish and glossyabove, usually blackishu^f? ^^ base, having the habit and appearance of T)re- p a n a c I a d tt s ; leavesstrongly falcate-secund,close, imbricate at base,oblong-lanceolate, thengradually narrowed andsubulate-acuminate, 3-yiim long, denticulateabove; costa excurrentor disappearing in theapex; seta usually markedly longer than the perich^etium; operculum as long as urn,obliquely beaked ; peristome teeth strongly papillose, trellis perfect, longer thanth
RMPG05EJ–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. VI. THE BRYALES 225 calyptra very large and covered with a dense growth of hairs (Fig. 119, D). The structure of the peristome in the Polytrichaceae is entirely different from that of the other Mosses. It is com- posed of bundles of thickened fibrous cells arranged in crescent form, the ends of the crescent pointing up, and united with the adjacent end of the bundle next it. The tops of the teeth thus formed are connected by a layer of cells stretching across the opening like the head of a dru
RF2WHAG52–Albany pitcher plant (Cephalotus follicularis) with flower stalk in natural habitat, Western Australia
RF2G02YNJ–Large group of Cephalotus follicularis, the Western Australian pitcher plant, in natural habitat with flower stalks
RM2CEG6FJ–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. Figure 217. Fnntinalis Noine-Angihe(From Siihiv. Icones) F1CLRE218. Fonlinalis Jalecarlica1 From Bry, Eiir.l F. Cardoti Ren. is a recently described species of wide distribution and it may prove fairlycommon. It is closely allied to Noiia-Angiiee, from which it differs in being considerably larger andmore densely foliate ; leaves imbricated, with thicker eel walls ; perichaetial leaves entire, not laceratewhen old; operculum longer; peristome teeth more papillose with
RMPG05FR–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 114.—Funaria hygrometrica. A, Part of the peristome; 0, an outer tooth; it one of the inner teeth, X85; B, section of the seta, X260; C, cross-section of upper part of calyptra, X52S. SO that the two guard cells have their cavities thrown into communication, and the division wall forms a cellulose plate'. 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 perf
RF2G0307A–Large group of Cephalotus follicularis, the Western Australian pitcher plant, in natural habitat with flower stalks
RM2CEG6J7–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. Figure 217. Fnntinalis Noine-Angihe(From Siihiv. Icones) F1CLRE218. Fonlinalis Jalecarlica1 From Bry, Eiir.l F. Cardoti Ren. is a recently described species of wide distribution and it may prove fairlycommon. It is closely allied to Noiia-Angiiee, from which it differs in being considerably larger andmore densely foliate ; leaves imbricated, with thicker eel walls ; perichaetial leaves entire, not laceratewhen old; operculum longer; peristome teeth more papillose with
RMPG3WG8–. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSES WITH A HAND-LENS 29 B. INDUSIATA has the capsule green or yellow, dull, little flattened above; outer peristome of four concentric rows of linear teeth, of which the outer row is short and the inner more than half the length of the cone; spores maturing a month or so earlier than in the preceding. Plants growing on very rotten wood, rather smaller. Both species are widely distributed across the continent, but B. aphylla is much the more com
RF2G02Y96–Large group of Cephalotus follicularis, the Western Australian pitcher plant, in natural habitat with flower stalks
RF2WNJKJJ–Albany pitcher plant (Cephalotus follicularis) with red pitchers in natural habitat, Western Australia
RM2CEG6RP–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. LA IK I.. II. FtjntiiK.lii I.escurii (?tom SviHiv. Icones) 398 MOSSES WITH HAND-LENS AND MICROSCOPE next, from which it differs chiefly in the softer, less concave leaves, more slen-derly acuminate and less obtuse, and in the more papillose peristome teeth withmore (20-28) lamellae. F. Novas-Angliae Sulliv. Plants firmer than in the last, of about the same size,leaves rather closer, more closely imbricated, ovate-lanceolate to oblong-lanceo-late, concave and usual
RMPG3WH7–. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSKS WITH A HAND-I,KNS. Figure i. Peristome of Orthotrichum callistomnm (From Bry. Eur.) 6, and 7, is very similar to that of Ceratodon, only the teeth are broader and less incurved when dry. In Fontinalis. which is always submerged, the peristome consists of a network, through the meshes of which the spores gradually escape. In a European moss, Orthotrichum callis- tomum Fisch., the inner peristome is a domelike structure with apertures near th
RF2WNJKJY–Albany pitcher plant (Cephalotus follicularis), multiple pitchers in the sun, in natural habitat, Western Australia
RM2CEHKGM–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. ja.taatlaii PLATE XXII. Rhacomitrium fasciciilare. (From Bry. Eur. I. Plant natural size, showing characteristic method of branching, -jb. Basal leaf-cells. 19. Peristome anilcapsule wall in section. 21. Cells from annuhis. The other figures are self-explanatory. CRIMMIACEAE 127 upper h-af-cills )oiiiii/is/i-i/iiiii/i(ili hyaline leaf-apices present, denticuiate; cosUistout; peristome teeth irn^iilarly divided; spores maturing in spring. Fre-quently confused with mi
RMPG3HNG–. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSES WITH A HAND-LENS 195 See bracts. Peristome, the fringe surrounding the mouth of the capsule upon removing the lid. This fringe may consist of a single row of processes, known as teeth, as in Fig. 7, or of a double row as in Fig. 27. In the latter case the entire fringe is still the peristome, but the term is also applied in a particular sense to the outer row; the outer row is often spoken of as the exostome (&), and the inner as the en
RF2WNJKK1–Red and green pitchers of the Albany pitcher plant (Cephalotus follicularis), in natural habitat, Western Australia
RF2WHAGB6–Albany pitcher plant (Cephalotus follicularis), strong plant with flower stalk in high grasses, natural habitat, Western Australia
RF2WHAG5Y–Albany pitcher plant (Cephalotus follicularis) with flower stalk in high grasses, natural habitat, Western Australia
RMRDWPD3–. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. PROTONEMA 287 The peristome-teeth are extremely sensitive to changes in the moisture-content of the air, curhng outwards when tire latter is dry, and inwards when it is damp. In dry weather, therefore, the powdery mass of spores inside the capsule is readilj' dispersed, whilst in wet weather the dome is reconstituted (Fig. 156, E), and the aperture, left by the shedding of the lid, closed. The actual dispersal, in which the elasticitj' of the seta plays a considerable part, is effected by a catapult-meclianis
RMPG3W8C–. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSUS WITH A I-IAND-LENS 83. Figure 31- Ortkotrickum anomalum (From Bry. Eur.)- a, 3, 4 and 5. I^eaves; x and x' indicate where the sections 3x and 3x' were made. 11. Vaginula. culum rostellate; peristome of 8 teeth, which when dry are recurved rather than reflexed, as the tip of the tooth some- times touches the capsule wall in a way to remind one of the handle of a mug. The spores mature by October, but I have collected operculate capsules in M
RF2WHAG6P–Albany pitcher plant (Cephalotus follicularis) in natural habitat, view from above, Western Australia
RMRDWPD7–. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. an.. Fig. 156.—Structure and development of the lloss-sporogonium (all figures, except F, represent Fiinaria hygrometrica). A, Longitudinal section through young capsule, apophysis (ap.), and the top of the stalk. B, Part of the capsule in the region of the lid, much enlarged. C, Small part of archesporium and spore sack, enlarged. D, Two pairs of peristome-teeth (inner and outer). F, Aperture of dehisced capsule, showing arrangement of peristome-teeth. F, Section of small part of apophysis of Bryum argenteum
RF2WNJKJR–Red pitchers of the Albany pitcher plant (Cephalotus follicularis), growing in mossy soil in natural habitat, Western Australia
![. Analytic keys to the genera and species of North American mosses [microform]. Mosses; Mousses. 356 BCLLXTIN OF THE UMVERSITT OF WISCONSIN. late; costa double, short; cells minute, indistinct, narrowly elliptic, pale, slightly papillose, alar quadrate; perichaetial leaves lanceolate-acuminate, longer, secund, concave, longitudinally plicate, ecostate; yellowish: seta yellowish-red, ascending; capsule horizontal, minute, asymuietric-cylin- dric, strongly constricted in middle, gibbous or strumose at base, wide- mouthed, brown; lid minute, short apiculate; peristome teeth very prom- inent, conn Stock Photo](https://c8.alamy.com/comp/RJ4E9H/analytic-keys-to-the-genera-and-species-of-north-american-mosses-microform-mosses-mousses-356-bcllxtin-of-the-umversitt-of-wisconsin-late-costa-double-short-cells-minute-indistinct-narrowly-elliptic-pale-slightly-papillose-alar-quadrate-perichaetial-leaves-lanceolate-acuminate-longer-secund-concave-longitudinally-plicate-ecostate-yellowish-seta-yellowish-red-ascending-capsule-horizontal-minute-asymuietric-cylin-dric-strongly-constricted-in-middle-gibbous-or-strumose-at-base-wide-mouthed-brown-lid-minute-short-apiculate-peristome-teeth-very-prom-inent-conn-RJ4E9H.jpg ". Analytic keys to the genera and species of North American mosses [microform]. Mosses; Mousses. 356 BCLLXTIN OF THE UMVERSITT OF WISCONSIN. late; costa double, short; cells minute, indistinct, narrowly elliptic, pale, slightly papillose, alar quadrate; perichaetial leaves lanceolate-acuminate, longer, secund, concave, longitudinally plicate, ecostate; yellowish: seta yellowish-red, ascending; capsule horizontal, minute, asymuietric-cylin- dric, strongly constricted in middle, gibbous or strumose at base, wide- mouthed, brown; lid minute, short apiculate; peristome teeth very prom- inent, conn Stock Photo")
RMRJ4E9H–. Analytic keys to the genera and species of North American mosses [microform]. Mosses; Mousses. 356 BCLLXTIN OF THE UMVERSITT OF WISCONSIN. late; costa double, short; cells minute, indistinct, narrowly elliptic, pale, slightly papillose, alar quadrate; perichaetial leaves lanceolate-acuminate, longer, secund, concave, longitudinally plicate, ecostate; yellowish: seta yellowish-red, ascending; capsule horizontal, minute, asymuietric-cylin- dric, strongly constricted in middle, gibbous or strumose at base, wide- mouthed, brown; lid minute, short apiculate; peristome teeth very prom- inent, conn
RF2WNJKK3–Albany pitcher plant (Cephalotus follicularis) in sun and shadow, natural habitat, Western Australia
RMRH9H2K–. The botany of Iceland. Botany -- Iceland. 478 A. HESSELBO is narrower than in Bryum inclinatnm, not-glossy, dark brown, finely pitted (in B. inclinatnm smooth and glossy), with a high and conical lid. The peristome teeth are narrow, dark yellow, with a very large, red fundus which is very easily loosened from the mouth of the capsule and falls off together with the peristome tooth belonging to it, equally wide to the middle or gradually taperi::g from the base, and very differently formed in the same peristome. Lamellae 12—18 in number, very differently developed even in the same peristome,
RF2WX9JRJ–Albany pitcher plant (Cephalotus follicularis) with flower stalks, in natural habitat, Western Australia
RMRH83KK–. Botany of the living plant. Botany; Plants. ,ft BOTANY OP THE LIVING PLANT I ,. ^ ,„ this plant explodes with a report Like a P^;**. *£ throws the h isoul to a distance oi many yards (Fig. 102). These and other explosive frnita will be considered again on p. 324. Mention may also be milll. ()f th, hygroscopic awns of the grass Stipa. through the twisting move- meats of whii h the seed tends to be pushed into the soil; and also of the move- ments of the peristome teeth of Mosses. An example of a rather different type of hygroscopic movement is seen in the dehiscence of the Fern sporangium, wh
RF2WX9JRR–Large group of Albany pitcher plants (Cephalotus follicularis), in mossy soil, natural habitat, Western Australia
![. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. Plate XVI.—Ditrichum heteromallum (i) Lecf, X22. (2) Leaf-tip, X400. (3) Leaf-tip, X32. (4) Cells of leaf- middle, X400. 4a. Peristome-teeth bifid to base, not connate nor perforate; leaf-tip wide; basal marginal leaf-cells short. Ditrichum ambiguum Best—Wash, and Oreg. 4b. Peristome-teeth not bifid to base, more or less connate or perforate; leaf-tip narrow; basal marginal leaf-cells long. Ditrichum pusillum^"^ (Hedw.) Timm.—Wash., Calif.; eastern N. Amer.. Plate XVIL—Ditrichum ambiguum (i) Leaf-tip, X32. (2) Leaf, X22. (3) Stock Photo](https://c8.alamy.com/comp/RH2NB0/the-bryologist-mosses-liverworts-lichens-botany-bryology-plate-xviditrichum-heteromallum-i-lecf-x22-2-leaf-tip-x400-3-leaf-tip-x32-4-cells-of-leaf-middle-x400-4a-peristome-teeth-bifid-to-base-not-connate-nor-perforate-leaf-tip-wide-basal-marginal-leaf-cells-short-ditrichum-ambiguum-bestwash-and-oreg-4b-peristome-teeth-not-bifid-to-base-more-or-less-connate-or-perforate-leaf-tip-narrow-basal-marginal-leaf-cells-long-ditrichum-pusillumquot-hedw-timmwash-calif-eastern-n-amer-plate-xvilditrichum-ambiguum-i-leaf-tip-x32-2-leaf-x22-3-RH2NB0.jpg ". The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. Plate XVI.—Ditrichum heteromallum (i) Lecf, X22. (2) Leaf-tip, X400. (3) Leaf-tip, X32. (4) Cells of leaf- middle, X400. 4a. Peristome-teeth bifid to base, not connate nor perforate; leaf-tip wide; basal marginal leaf-cells short. Ditrichum ambiguum Best—Wash, and Oreg. 4b. Peristome-teeth not bifid to base, more or less connate or perforate; leaf-tip narrow; basal marginal leaf-cells long. Ditrichum pusillum^"^ (Hedw.) Timm.—Wash., Calif.; eastern N. Amer.. Plate XVIL—Ditrichum ambiguum (i) Leaf-tip, X32. (2) Leaf, X22. (3) Stock Photo")
RMRH2NB0–. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. Plate XVI.—Ditrichum heteromallum (i) Lecf, X22. (2) Leaf-tip, X400. (3) Leaf-tip, X32. (4) Cells of leaf- middle, X400. 4a. Peristome-teeth bifid to base, not connate nor perforate; leaf-tip wide; basal marginal leaf-cells short. Ditrichum ambiguum Best—Wash, and Oreg. 4b. Peristome-teeth not bifid to base, more or less connate or perforate; leaf-tip narrow; basal marginal leaf-cells long. Ditrichum pusillum^"^ (Hedw.) Timm.—Wash., Calif.; eastern N. Amer.. Plate XVIL—Ditrichum ambiguum (i) Leaf-tip, X32. (2) Leaf, X22. (3)
RF2WX9JRX–Albany pitcher plant (Cephalotus follicularis) with big red pitchers, in natural habitat, Western Australia
RMRH2N8C–. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. -96-. Plate XXI. Rhacomitrium aciciilare. (t) Plant, Xi. {2) Leaf-margin near tip, X400. (3) Leaf, Xi7- (4) Portion of cross section through lower part of leaf, X5S0. (5) Plant, Xi. (6) Cross section through leaf-margin near tip, XSSo. (7), (8) Inner perichaetial leaves, X17. (9) Capsule, X17. (10) Cells of leaf-base, X-100. (11) Cells of leaf-middle, X400. (12) Cells of leaf-tip, X400. cylindric, not narrowed at the mouth, its body 2.2-2.6 mm. long. Peristome teeth usually divided into 3 or rarely 2 divisions; divisions unequal,
RF2WX9JRK–Albany pitcher plant (Cephalotus follicularis) in backlight, in natural habitat, Western Australia
RMRH2NBB–. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. -58- Ditrichum heteromallum^^ (Hedw.) E. G. B.—Alaska to Oreg.; N. H. 3b. Leaves somewhat revolute, gradually narrowed; (4) seta red, 1-2 cm. long; (5) stems up to 10-20 mm. long.. Plate XVI.—Ditrichum heteromallum (i) Lecf, X22. (2) Leaf-tip, X400. (3) Leaf-tip, X32. (4) Cells of leaf- middle, X400. 4a. Peristome-teeth bifid to base, not connate nor perforate; leaf-tip wide; basal marginal leaf-cells short. Ditrichum ambiguum Best—Wash, and Oreg. 4b. Peristome-teeth not bifid to base, more or less connate or perforate; leaf-tip
RF2WX9JRP–Albany pitcher plant (Cephalotus follicularis) in natural habitat on the water´s edge, Western Australia
RM2AWWH40–Text-book of botany, morphological and physiological . termed by systematists a peristome, although their originand structure are widely different from that of the true peristome in other genera.For, except in the Polytrichaceae, neither the teeth nor the cilia consist of cellulartissue, but only of thickened and hardened parts of the walls of a layer of cells, whichis separated by some layers of thin-walled cells from the epidermis which forms theoperculum ; the latter layers, as well as the dehcate parts of the former, becomingruptured and disappearing, while the thickened parts of the wall
RM2ANDX02–Organography of plants, especially of the archegoniatae and spermaphyta . Polytrichaceae. In all the Polytrichaceae the teeth of the peri-stome are formed out ofn^ entire dead cells, as has been mentioned above. Thesecells arise from the mother-cells of the peristome bycell-division, which proceedsfurther than it does in theBuxbaumiaceae. In Dawsonia, a genusvery near Polytrichum in itsvegetative characters, theperistome is a long brushof numerous bristles. Thesebristles are segmented bycross-walls, which are usuallyoblique. I had recentlyopportunity in Australia toexamine two species of Daw-s
RF2WNJKJT–Albany pitcher plant (Cephalotus follicularis), adult pitchers in the sun, in natural habitat, Western Australia
RM2AWWJ9A–Text-book of botany, morphological and physiological . teeth of the peristome, and covering the opening of the theca. We must now examine somewhat more closely the origin of the Peristome. Inthose genera w-hich, like Gymnostomum, do not form a peristome, the parenchymawhich fills up the inner space of the operculum is homogeneous and thin-walled; when 33^ MUSCINEJE. the theca is ripe, it contracts and dries up at the bottom of the operculum, whichis formed essentially only of the epidermis; or it remains attached to the columella andforms a thickening at its summit, which projects over the ope
RF2WX9JRW–Albany pitcher plant (Cephalotus follicularis) with red pitchers and emerging flower stalks, in natural habitat, Western Australia
RM2ANDXHJ–Organography of plants, especially of the archegoniatae and spermaphyta . ONIUM OF MUSCI capsule; the outer bend backwards. In Orthotrichum callistomum the teethof the peristome hang together in the centre, and there is formed a caster. Fontinalis and Cinclidium. A caster is also produced in Fontinalis, wherethe inner peristome makes a delicate trellis-work ; also in Cinclidium, where itappears as a dome with sixteen holes at its base, which are closed in moist air bythe teeth of the outer peristome. Funaria. The teeth of the outer peristome in Funaria converge togetherat the tip, and they for
RF2WNJKJN–Red pitchers of the Albany pitcher plant (Cephalotus follicularis) with emerging flower stalks, growing in moss in natural habitat, Western Australia
RM2AFK1YM–. The structure and development of mosses and ferns (Archegoniatae). Fig. 119.—A, Barhula fallax, upper part of the capsule, showing the slender twistedperistome teeth X about 20. B, Fontiualis antipyretica, showing doubleperistome (after Schimper). C, Polytrichum commune, peristome and epiphragmaX8. D, P. commune, ripe capsule; i, with, 2, without the calyptra X3. peristome of Buxhaumia, or a perforated membrane, as in Fon-tinalis (Fig. 119, B). The base of the capsule, or apophysis, which Haberlandt(4) has shown to be the principal assimilative part of the sporo^:gonium, and which alone is p
RF2WX9JRT–Large plant of Cephalotus follicularis, the Albany pitcher plant, in natural habitat, Western Australia
RM2AFK36E–. The structure and development of mosses and ferns (Archegoniatae). Fig. 119.—A, Barhula fallax, upper part of the capsule, showing the slender twistedperistome teeth X about 20. B, Fontiualis antipyretica, showing doubleperistome (after Schimper). C, Polytrichum commune, peristome and epiphragmaX8. D, P. commune, ripe capsule; i, with, 2, without the calyptra X3. peristome of Buxhaumia, or a perforated membrane, as in Fon-tinalis (Fig. 119, B). The base of the capsule, or apophysis, which Haberlandt(4) has shown to be the principal assimilative part of the sporo^:gonium, and which alone is p
RF2WX9JT0–Albany pitcher plant (Cephalotus follicularis), flowering plant in mossy soil, in natural habitat, Western Australia
RM2AFK6M9–. The structure and development of mosses and ferns (Archegoniatae). Fig. 114.—Funaria hygrometrica. A, Part of the peristome; o, an outer tooth; t, oneof the inner teeth, X85; B, section of the seta, X260; C, cross-section of upper•part of calyptra, X525, SO that the two guard cells have their cavities thrown intocommunication, and the division wall forms a cellulose plate vr. THE BRYALES 213 extending from the lower to the upper surface of the stoma,but with its ends quite free. The formation of the pore bythe sphtting of the middle lamella of the division wall takesplace in the ordinary way
RF2WX9JRY–Albany pitcher plant (Cephalotus follicularis), flowering plant in between many adult plants in mossy soil, in natural habitat, Western Australia
RF2WHAG67–Albany pitcher plant (Cephalotus follicularis), seedling with pygmy sundew (Drosera pulchella) in natural habitat, Western Australia
RM2AWXAPH–The structure & development of the mosses and ferns (Archegoniatae) . Fig. 102.—F-iinaria hygrometrica (Sibth.). A, Part of the peristome ; o, an.outer tooth; z, one of theinner teeth, X85 ; B, section of the seta, X260 ; C, cross-section of upper part of calyptra, XS25. teeth of the peristome are extremely hygroscopic, and probably VII THE BR VINEyE 205 assist in lifting off the operculum as well as removing thespores from the urn. When wet they bend inward, extendinginto the cavity of the urn. As they dry they straighten outand lift the spores out. The marked hygroscopic movementsof the seta
RM2AWX7X0–The structure & development of the mosses and ferns (Archegoniatae) . Fig. 105.—Tetraphis pellucida (Hedw.). A, Plant with gemmae, X6 ; B, upper part of the same,.X 50; C, young gemma, x 600 ; D, a fully-developed gemma, X 300. other Mosses. After the operculum falls off the tissue lyingbeneath splits into four pointed teeth, which, however, are not,as in Funaria, composed simply of the cell walls, but aremasses of tissue. All of the other higher Bryines, with the exception of thePolytrichacese, have the peristome of essentially the same struc-ture as that described for Funaria. Sometimes the
![The elements of botany for beginners and for schools . spore-case of a Moss, which haaa peristome of 16 pairs of teeth. 538. The double peristome of a Hypnum.539-541. Spore-case, detached calyptra, and top of more enlarged apore-cas6and detached lid, of fhyscomitrium pyriforme (Fig. 527): Qrtfloe shows that therela no peristome. SECTION 17.] BRY0PHYTE3. 165 and very hygrometric threads (called Elaters) whicli are thought to aid inthe dispersiou of the spores. (Fig. 542-544.) 502. Marchantia, the commonest and largest of the true Liverworts,forms large green plates or fronds on damp and sliady Stock Photo](https://c8.alamy.com/comp/2AX1WMX/the-elements-of-botany-for-beginners-and-for-schools-spore-case-of-a-moss-which-haaa-peristome-of-16-pairs-of-teeth-538-the-double-peristome-of-a-hypnum539-541-spore-case-detached-calyptra-and-top-of-more-enlarged-apore-cas6and-detached-lid-of-fhyscomitrium-pyriforme-fig-527-qrtfloe-shows-that-therela-no-peristome-section-17-bry0phyte3-165-and-very-hygrometric-threads-called-elaters-whicli-are-thought-to-aid-inthe-dispersiou-of-the-spores-fig-542-544-502-marchantia-the-commonest-and-largest-of-the-true-liverwortsforms-large-green-plates-or-fronds-on-damp-and-sliady-2AX1WMX.jpg "The elements of botany for beginners and for schools . spore-case of a Moss, which haaa peristome of 16 pairs of teeth. 538. The double peristome of a Hypnum.539-541. Spore-case, detached calyptra, and top of more enlarged apore-cas6and detached lid, of fhyscomitrium pyriforme (Fig. 527): Qrtfloe shows that therela no peristome. SECTION 17.] BRY0PHYTE3. 165 and very hygrometric threads (called Elaters) whicli are thought to aid inthe dispersiou of the spores. (Fig. 542-544.) 502. Marchantia, the commonest and largest of the true Liverworts,forms large green plates or fronds on damp and sliady Stock Photo")
RM2AX1WMX–The elements of botany for beginners and for schools . spore-case of a Moss, which haaa peristome of 16 pairs of teeth. 538. The double peristome of a Hypnum.539-541. Spore-case, detached calyptra, and top of more enlarged apore-cas6and detached lid, of fhyscomitrium pyriforme (Fig. 527): Qrtfloe shows that therela no peristome. SECTION 17.] BRY0PHYTE3. 165 and very hygrometric threads (called Elaters) whicli are thought to aid inthe dispersiou of the spores. (Fig. 542-544.) 502. Marchantia, the commonest and largest of the true Liverworts,forms large green plates or fronds on damp and sliady
RM2AX1XKY–The elements of botany for beginners and for schools . ases raised on a slender stalk.The spore-case loosely bears on its summita thin and pointed cap, like a candle-extin-guisher, called a Cal^ptra. Detaching this, itis found that the spore-case is like a pyxis(376), that is, the top at maturity comes offas a lid {Operculum); and that the interior isfilled with a green powder, the spores, whichare discharged through the open mouth. Inmost Mosses there is a fringe of one or tworows of teeth or membrane around this mouthor orifice, the Peristome. 62S 627 When moist the peristome closes hygromet
RM2AWFH49–Handbook of British mosses : comprising all that are known to be natives of the British Isles . f, magnified. c. veil, magnified. d. sporangium, magnified. e. portion of peristome and tip of columella, round which the tips of some of the teeth are wound, magnified. 3. Tortula muralis. a. plant, nat. size. c. sporangium and veil, magnified. b. leaf, magnified. d, sporangium with lid, magnified. 4. T. ruralis. a. plant, nat. size. c. sporangium, magnified. h. leaf, magnified. d. peristome, magnified. e. part of peristome, more highly magnified. 5. Leptotrichum homomallum. a. plant, nat. size. c.
RM2ANF562–Handbook of British mosses; comprising all that are known to be natives of the British Isles . t. size. b. leaf, magnified. c. veil, magnified. d. sporangium, magnified. e. portion of peristome and tip of columella, round which the tips of some of the teeth are wound, magnified. 3. Tortula muralis. a. plant, nat. size. c. sporangium and veil, magnified. b. leaf, magnified. d. sporangium with lid, magnified. 4. T. ruralis. a. plant, nat. size. c. sporangium, magnified. b. leaf, magnified. d. peristome, magnified.e. part of peristome, more highly magnified. 5. Leptotrichum homomallum. a. plant,
RM2AXGYRH–Nature and development of plants . ,removed. 6, section of nearly mature capsule—sp, spore-forming cellssurrounded on outside by loosely arranged chlorophyll-bearing cells; 0,operculum; r, annulus; p, peristome; a, apophysis. 8, magnified view ofa portion of the capsule, showing the annulus, r, and the thick-walled cellsof the peristome, p, which are attached at their base to the epidermis bya double row of cells; sp, spore-forming cells. 7, the cells shown in 8, p,have split apart, thus forming the inner and outer teeth-like segments ofthe peristome.—After Sachs. 280 EVOLUTION OF liRYOPHYTA v
![. Mollusca ... Fig. .3.—Eadula of Strcptaxis ohtusiis. (After Stoliczka.)] b2 TESTAOBIiLIDjE.. [Fig. 4.—Buccal mass, ganglia, &c. of Sireptaxis obtusa. (After Stoliczka.)] The measurements of Streptaxis are the following :—The lengthand breadth are the diameters of the shell as it rests on the body-whorl ; the height is that of the shell laid on a flat surface at rightangles to the other two. Forms of this genus are common on the hills of Southern India,and several of the species occurring appear to be widely spreadand very variable. The teeth in the peristome vary in numberand position, and e Stock Photo](https://c8.alamy.com/comp/2CENYTW/mollusca-fig-3eadula-of-strcptaxis-ohtusiis-after-stoliczka-b2-testaobiilidje-fig-4buccal-mass-ganglia-c-of-sireptaxis-obtusa-after-stoliczka-the-measurements-of-streptaxis-are-the-following-the-lengthand-breadth-are-the-diameters-of-the-shell-as-it-rests-on-the-body-whorl-the-height-is-that-of-the-shell-laid-on-a-flat-surface-at-rightangles-to-the-other-two-forms-of-this-genus-are-common-on-the-hills-of-southern-indiaand-several-of-the-species-occurring-appear-to-be-widely-spreadand-very-variable-the-teeth-in-the-peristome-vary-in-numberand-position-and-e-2CENYTW.jpg ". Mollusca ... Fig. .3.—Eadula of Strcptaxis ohtusiis. (After Stoliczka.)] b2 TESTAOBIiLIDjE.. [Fig. 4.—Buccal mass, ganglia, &c. of Sireptaxis obtusa. (After Stoliczka.)] The measurements of Streptaxis are the following :—The lengthand breadth are the diameters of the shell as it rests on the body-whorl ; the height is that of the shell laid on a flat surface at rightangles to the other two. Forms of this genus are common on the hills of Southern India,and several of the species occurring appear to be widely spreadand very variable. The teeth in the peristome vary in numberand position, and e Stock Photo")
RM2CENYTW–. Mollusca ... Fig. .3.—Eadula of Strcptaxis ohtusiis. (After Stoliczka.)] b2 TESTAOBIiLIDjE.. [Fig. 4.—Buccal mass, ganglia, &c. of Sireptaxis obtusa. (After Stoliczka.)] The measurements of Streptaxis are the following :—The lengthand breadth are the diameters of the shell as it rests on the body-whorl ; the height is that of the shell laid on a flat surface at rightangles to the other two. Forms of this genus are common on the hills of Southern India,and several of the species occurring appear to be widely spreadand very variable. The teeth in the peristome vary in numberand position, and e
RM2CDXN91–. Science-gossip . in Cole.l Hygroscopic Hairs of Wood-rtjshes.—^Thecuriously energetic movements of the elaters ofthe spores of horsetails (Equiseium), when gentlybreathed upon, are probably familiar to all users ofthe microscope; also, the similar movements ofthe teeth of the peristome of the capsules of mosses.In these cases it is not difficult to see that thehygroscopic movements of the organs in questionare of great importance to the plants concerned.Hygroscopic movements take place among thehairs of wood-rushes (Luzuia), where, however, itis not easy to say of what use these movements ar
RM2CEJ43P–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. een the segments and attached to 34 MOSSES WITH HAND-LKNS AM) MICROSCOPE the basal memhranc there are usually one or more slender hair-like cilia. Thesegments of the inner peristome are often more or less split along their keeledmedian line, much after the manner of the teeth of the peristome of theAplolepide^p; for this reason and several other more cogent reasons, the two aresupposed to be homologous in spite of their dissimilar appearance. (See alsopage 36.) The fo
RM2CENYGF–. Mollusca ... ig. 15.—Enma moerchiana , and yiew of base. vertical, subaxial, rounded, parietal fold vertical, well developedanother strong but less prominent fold within right margin noother teeth ; peristome broadly reflected, deeply sinuate abovethedextral fold. Length 4|, breadth 2| mm. Hab. Centre of Great Nicobar. ZONITIDJE, 25 Family ZONITID^.Subfamily ARIOPHANTIN.E. [The AriophantiiKe form a very distinct subfamily of the IndianMollusca, and are almost exclusively conHned to the Peninsulararea and Ceylon ; only two species are found extending a shortdistance northward into the Gauget
RM2CEJ40R–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. is sectionshows clearly the method of formation of the double peristome. The teeth of the outer peristome are formedby thickenings, or plates, laid down on the inner and outer faces of the outer wall of a layer of cells extend-ing around the capsule; these thickenings are continued along the top and bottom walls of these cells to formthe transverse bars or trabecula;. The inner wall of this same layer of cells becomes thickened to form theinner peristome. 3 shows one-
RM2CEH8W4–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. ; annulus lacking ■Iviericaiia. Capsules plainly cernuous; annulus large flaruans. 3. Segments of inner peristome at least -,5 length of teeth ; spores 12-16M in diameter ; common everywhere hygrometiica. Inner peristome rudimentary ; spores 24-32M ; rare microstoma. F. hygrometrica (L.) Sibth. the Cord Moss, is so called because of thetwisted seta, which is very hygroscopic and untwists when moist. Its Latin name,Funaria, is derived from funis, a rope. This twisting
RM2CEHT92–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. is^^^ vm %>i. FiCURE 41 Plants, capsules, peristome, leaf-apex amibase. (From Bry. F.iir. ) Peristome typically of 16 solid colored teeth cleft to the mid-dle. There are several variations from this type in the matterof the division of the teeth. Blindia acuta (Huds.) B. and S. is a rare species of mountainrocks with capsules like those of Seligeria, but with longer stemsand with the enlarged angular cells of this subfamily. Bliudid ciciilci may be confused wit
RM2CEJ3NN–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. See seta. Pendulous, somewhat hanging or drooping ;more so than in reniuous. ( Fig. 28. ) Percurreiit tosta, reaching to the apex of theleaf, but not beyond. Pericheetial. See bracts.Perigoiiial. See bracts. Peristome, the fringe surrounding the mouth ofthe capsule upon removing the lid. This fringemay consist of a single row of processes, known.as teeth, as in Fig. g, or of a double row as inFig. 34. In the latter case the entire fringe isstill the peristome,but the
RM2CEHBGH–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. PLATE XX.WII. Encalypta ciliala (From Bry. Eur.) 172 MOSSES WITH HAND-LENS AND MICROSCOPE. FicuRt gi, hncalypla fulgaris (From Bry. Eur.Iih. Plant enlarged. usually serve to identifyit. The capsules arenot ridged when dry;the peristome is single,of i6 teeth; spores ma-turing in late summer. E. vjilgaris (Hedw.)Hoffm. is rare in Amer-ica. It is alpine orsubalpine; small, about12! high or less ; leavesobtuse-rounded and apic-ulate, or more or lessacute; costa excurrento
RM2CEJ0EA–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. ebase and the queer bug - like capsule. Mrs.Britton calls the Buxbaumias The Hump-backed Elves. To the author they look likebugs on a stick. We have two species in east-ern North America, BiixbiUiwui upbylla L., andB. imhisiatn Brid. B. aphylla has the capsule red-brown, shin-ing, strongly flattened above; stomata one-celled, immersed ; outer peristome of a singleseries of very short teeth; spores 0.005! to0.008 in diameter, maturing from Decemberto April, occasionall
RM2CEJ4EF–. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. Figure 27. Half of .1 section of the peristomeand o|ierciiliim of Georgia (Telrapliis);a. Operculum composed of a single layerof cells: b. Tissue which fills the oper-culum and which splits into four parts toform the peristome. S. Peristome ofGeorgia. < 40. 30 MOSSES WITH HAND-LENS AND MICROSCOPE. Figure 3 I. Moist peristome of Po/yfrif/ium O/iioerue. R. & C. 2.The same dry. 3. Dry peristome of Gfurf/a. 4. The same wet.5. Four teeth of the peristome of Calharinea u
![. Mollusca ... Pig. hQ.— Oxytes orobia. (From Stoliczkas drawing.). [Fig. 60.—OxyUs orobia. A. Animal, spirit-specimen, shell removed, tbe right and left sides showing dorsal lobes. B. The posterior left dorsal lobe, enlarged.0. Genitalia. D. Jaw. E. Teeth of the radula. X 150. F. Extremity of the foot, contracted in spirit, enlarged. Oxytes oxyies. G. Extremity of foot, drawn from life.] OXYTES.—BHNSONIA. 171 peristome oblique, acute, but thickened inside, basal and columellarmargins somewhat reflected. Major diam. 37, min. 30, height 22 mm. A more depressedshell measares 34, 29, and 19 mm. H Stock Photo](https://c8.alamy.com/comp/2CENTDH/mollusca-pig-hq-oxytes-orobia-from-stoliczkas-drawing-fig-60oxyus-orobia-a-animal-spirit-specimen-shell-removed-tbe-right-and-left-sides-showing-dorsal-lobes-b-the-posterior-left-dorsal-lobe-enlarged0-genitalia-d-jaw-e-teeth-of-the-radula-x-150-f-extremity-of-the-foot-contracted-in-spirit-enlarged-oxytes-oxyies-g-extremity-of-foot-drawn-from-life-oxytesbhnsonia-171-peristome-oblique-acute-but-thickened-inside-basal-and-columellarmargins-somewhat-reflected-major-diam-37-min-30-height-22-mm-a-more-depressedshell-measares-34-29-and-19-mm-h-2CENTDH.jpg ". Mollusca ... Pig. hQ.— Oxytes orobia. (From Stoliczkas drawing.). [Fig. 60.—OxyUs orobia. A. Animal, spirit-specimen, shell removed, tbe right and left sides showing dorsal lobes. B. The posterior left dorsal lobe, enlarged.0. Genitalia. D. Jaw. E. Teeth of the radula. X 150. F. Extremity of the foot, contracted in spirit, enlarged. Oxytes oxyies. G. Extremity of foot, drawn from life.] OXYTES.—BHNSONIA. 171 peristome oblique, acute, but thickened inside, basal and columellarmargins somewhat reflected. Major diam. 37, min. 30, height 22 mm. A more depressedshell measares 34, 29, and 19 mm. H Stock Photo")
RM2CENTDH–. Mollusca ... Pig. hQ.— Oxytes orobia. (From Stoliczkas drawing.). [Fig. 60.—OxyUs orobia. A. Animal, spirit-specimen, shell removed, tbe right and left sides showing dorsal lobes. B. The posterior left dorsal lobe, enlarged.0. Genitalia. D. Jaw. E. Teeth of the radula. X 150. F. Extremity of the foot, contracted in spirit, enlarged. Oxytes oxyies. G. Extremity of foot, drawn from life.] OXYTES.—BHNSONIA. 171 peristome oblique, acute, but thickened inside, basal and columellarmargins somewhat reflected. Major diam. 37, min. 30, height 22 mm. A more depressedshell measares 34, 29, and 19 mm. H
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