The
shell is always white with brown spiral bands. The shell is medium-sized to small with a subdepressed to subconoidal
spire. The
umbilicus is open.
Reproductive system There is a presence of two symmetrical dart sacs and two long accessory sacs, which are always longer than the dart sacs. There are four branched mucous glands around the vagina and penis is with penial appendix at its base. Penis is innervated from the right cerebral ganglion. == Species ==