The shellsize varies between 50mm and 94 mm. The shell has strong spiral ribs and intermediate ribletsconsisting of 6 or 7 major ribs on the body whorl and 2 or 3 on each spire whorl. The first 2 or 3 ribs on each whorl are bifid. Axial ribs on spire whorls are numerous, and become strong nodules on the periphery. Later whorls may have strong, high varices. The outer lip has 7 or 8 strong bifid teeth internally. It is white or fawn in color and the shell is covered with a thick, brown, sometimes hairyperiostracum when alive.