The Conchological Society of Great Britain and Ireland

Solid shell up to 6.5 cm long. Plump shell that can be as wide as it is long. Pallial sinus small and triangular. Sculpture strong concentric ridges which are warty especially towards the front margin and the sides. Yellow-brown occasionally with three or four red-brown or purple rays; sometimes broken or zigzag. Inside white but may be stained purple or brown.