Shell large, up to 117.5 mm. (4% inches) in length, thin, elongate-ovate, tall and narrow, with parallel sides, the apex a little forward of the middle, and curving anteriorly. Sculpture consisting of very numerous, rather unequal, linear-spaced riblets; margin very minutely crenulated, convex at the sides, and concave at the ends. Colour: externally dull brownish buff; internally light pinkish fawn, the central area irregularly clouded with whitish callus.
Radula: Formula 3 + 1 + (2+1+2) + 1 + 3. Central teeth 5, forming a chevron, the median one small and very narrow, bearing a simple small cusp, outer pairs of centrals massive, each with a broad flat-topped cusp, ridged on each side, the ridges more prominent on the outermost teeth; pluricuspid lateral with two cusps, each similar to those of the outer centrals; the three marginals are small, each with a single simple cusp, outermost marginal largest of the three. Length 63,0 – 117,5 mm; Width 35-51 mm; Heigth 23,0- 50,0 mm

Range: South Africa, from Port Nolloth in the west to Danger Point in the south. Records from further afield, including one from St. Helena, are due to drift, along with large algae, upon which the species lives.