The seven whorls are longitudinally costate below the sutures and above the periphery, with two spiral series of tubercles around the middle of the flattened upper surface, or sometimes finely irregularly plicate over the whole upper surface.

The periphery is acutely carinated, bearing numerous short compressed triangular radiating spines.

The flat base of the shell is densely radiately lamellose-striate, with a strong rib revolving midway between the periphery and the center The aperture is oblique, pearly white within, transversely ovate, deeply channelled at the periphery.

The columellar region is white, strongly bicostate, deeply excavated at the position of the umbilicus.

The outer surface is white, with a strong curved central rib, its terminations joined by a A-shaped ridge.