Shell sculptured with strong spiral ribs; shoulders strongly nodulose. Ribs at the shoulder and below usually alternating large and small. Shoulder nodules crossed by two large bifid ribs and a riblet between. Outer lip thickened, strongly toothed within. Columella smooth, with one tooth posteriorly; umbilicus nearly closed by columellar callus. Anterior canal open, short. Rib coloration fawn, intervening grooves brown, interior and columella white. Shell covered by a thin, smooth yellowish-brown periostracum when alive. Operculum oval.

Showing all 3 results

Show sidebar