The base of the shell is concave, radiately, closely and prominently striated, more conspicuous flattened, coalescing and sinuously curving at the edge.

Commencing at the point where the outer lip joins the body whorl, a shallow groove follows parallel to the periphery and extends toward the aperture without interrupting the basal sculpture.

It is nacreous, silvery white toward the edge, bright lustrous golden yellow within and around the umbilical region, which latter though deeply pitted is not open.

The white columella has a callus and is arcuated with a moderately developed rib bounding the umbilical depression and terminating in a single tubercle.

This rib is paralleled by a shallow furrow terminating in a notch just below the tubercle, and by an exterior or outer ridge, part of the way double, of a brilliant orange color.