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