(picture not licenced under creative commons) a pila virens snail from sri lanka, summer . var. layardi (reeve) (picture not licenced under creative commons) asolene (asolene) sp . photographed in an aquarium....
(picture not licenced under creative commons) shell : the relative robust shell of asolene pulchella has a pointed top and the aperture (shell opening) is oval in shape, in which the corneous operculum can be retracted. the sutures are relatively flat and the umbilicus is of medium size. the shell surface...
(picture not licenced under creative commons) fossil shell of pomacea paludosa , from the bermont formation (florida, middle pleistocene: - years ago)....