[3] The shell is internal, solid, ovate, convex above, flatly concave beneath, with a small apex, not coiled, lying on the right side as seen from about near the end.

[3] The animal very similar to that of Girasia, but the lobes of the mantle united into an oval shield, tricarinate above and completely covering the shell, only a small pinhole-like orifice near the posterior end being left open.

From Girasia the present genus is separated by its almost imperforate shield, the more solid shell of different form, and by several small distinctions in the genitalia.

There is a large swelling of the free oviduct (ovitheca) just beyond the point where the vas deferens is given off.

[3] The radula has a broad band of wider median teeth, tricuspid as a rule, and these pass into bicuspid outer laterals, with the two cusps subequal and terminal as in Girasia.