8 Mariana Islands species out of ? reported
Clithon corona
Clithon corona (aperture)
Neritina auriculata
Neritina auriculata (aperture)
Neritina squamipicta
Neritina squamipicta (aperture)
Neritina turrita
Neritina turrita (aperture)
Neritina variegata
Neritina variegata (aperture)
Septaria porcellana (encrusted)
Septaria porcellana (aperture)
Septaria porcellana (light)
Septaria porcellana (zebra)
Stenomelania plicaria (light)
Stenomelania plicaria (dark)
Tarebia granifera