Shell large, up to 85 mm. (3,375 inches) in length, strong but of relatively light build, broadly ovate and tall-conical, with the apex almost central. Sculpture of radiate folds that strongly corrugate the margin; five of the radials on the posterior half of the shell are stronger than the rest; radials and interspace alike bear closely-spaced cords that are rendered scabrous by dense concentric growth-lamellae. Colour of exterior greyish to dull-white with an underlying pattern of dark-brown, zigzag, concentric markings, often forming a netted design; interior bluish white, the spatula dark-chocolate, with clearly defined edges, and a marginal pattern of numerous short, dark-brown dashes, with regular gaps corresponding to the external primary radials. Radula—Formula 3 + 1 + (2+1+2) + 1+3. The median central is small and slender, flanked by a pair of stout fully-developed centrals on either side, followed by a pluricuspid lateral, and the usual three, more or less functionless, marginals. The centrals, collectively, form a chevron, as in other members of this subgenus. The cusps of the paired centrals and the pluricuspid laterals are leaf-shaped, obliquely flexed, and with a median groove or depression. Length 60-85 mm; Width 49.5 – 78.5 mm; Height 20-35 mm.

This large but relatively thin South African limpet is easily recognised by its broadly ovate, almost pentagonal outline, strong, narrowly crested, radial ribs, and distinctive coloration of the interior which is bluish white with a clearly outlined dark-brown spatula.

South Africa, Port Nolloth on the west coast, south to False Bay and extending eastward to Danger Point.