As Cassis inflata:
Shell rather short, solid, scarcely obovate, with a moderate, sharp spire, the whorls of which are hardly rounded, the sculpture consisting of narrow, rather distant, revolving grooves crossed by more or less developed longitudinal ribs, making the spire and sometimes the body whorl cancellated. Outer lip thick, reflexed and becoming very heavy with age, strongly ridged within; columellar callus strong, granulate without; plicate within. Color purplish or bluish white, sometimes tinted brownish, with revolving rows of darker square spots.
Length, 60; diameter, 40 mm.