The columella is strong and thick, arcuate above, spread upon the body whorl and nearly over the umbilicus in a pad of callus, which is either white, pink or deep crimson.

The callus is kidney-shaped, but slightly convex, filling the umbilicus except a narrow chink.

From the outer termination of the callus an arcuate groove extends to the base of the columella, within which the surface of the shell is radiately finely striate and darker colored.

[5] Radula: The teeth, especially those of the central part are very thin and transparent, without distinct cusps; the rhachidian tooth (R) is broadly winged, bow-shaped, at its upper part it is thickened, a true cusp cannot be detected.

[6] This marine species occurs off Southeast Asia, Guam, the Philippines, Japan and Australia.