Shell large, up to 92 mm. (3,6 inches) in length, solid, ovate, depressed, the apex at about the anterior third, anterior slope almost straight, posterior slope convex, margin weakly crenulated. Sculpture consisting of numerous low narrow irregular radial ribs, 10 of them primary, and between 80 and 85 secondary radials. Colour of exterior dull black, more deeph impregnated in the rib interstices; interior creamy-white, with the spatula tinged pale flesh-colour; margin with a narrow amber coloured border, through which the external colour shows as a continuous series of irregular black dashes. Length: 81-92 mm; Width: 63-73 mm; Height: 22-25 mm.

A large solid limpet, but evidently of smaller adult size than kermadecensis, from which it differs in shape, being regularly ovate, not narrowed anteriorly, and also in the coloration of the exterior, which is black instead of orange. The writer knows of only the two type specimens of this rare species.

Tikopia (Tucopia) Island, Melanesia.