Usilla tosana

and the length of the aperture 8 mm (Original description) The small, imperforate shell is fusiform and solid.

The sculpture consists of numerous longitudinal rounded folds or waves, many of them followed by a raised line marking a former peristome.

There are about 7 whorls in perfect shells, the first two forming a smooth, bulbous, shortly cylindric protoconch.

The body whorl is inflated peripherally, contracted below, with a plicate basal fasciole.

The aperture is slightly more than half the length of the shell, dark purplish-brown with light bands within.