Shell small, thin, globose, much inflated. Whorls two, last large, rather oblique, contracted below the vertex. Spire concave. Sculpture: microscopic, dense, spiral strings of oval beads, interrupted by growth lines. Colour white. Interior smooth, polished. Columella edge curled, behind it an umbilical groove. Inner lip broadly arched below, sharply recurved above. Outer lip above detached from the whorl and reaching forward. Length, 3 mm.; breadth, 2,5 mm.
The small size, rotundity, curvature of the inner lip and free lobe of the outer one are features which distinguish this species.
A few specimens from off Cape Three Points in 41-50 fathoms; and from off Port Kembla in 63-75 fathoms.