Shell of moderate size, up to 41 mm. (1,625 inches) in length, solid, broadly ovate, only moderately elevated, the apex varying from subcentral to the anterior third; margin strongly crenulated. Sculpture strong and coarse, consisting of numerous carinated radials; primaries more or less alternating with secondaries; linear interspaces deep, and the whole surface rendered strongly scabrous to nodulose by dense concentric growth ridges. Young examples are very depressed and have 9 of the primary radials somewhat stronger than the rest. Colour of exterior dull-white; interior greyish white, the spatula yellowish to fawn, but mostly completely covered by white callus; margin white-callused, with short dark-brown lines corresponding to the external rib interstices; in some examples these radial colour lines extend intermittently, within the shell substance, almost to the spatula. Length: 33-41 mm, Width 28-37 mm; Height: 10-20 mm.

This species is distinguished from howensis, another Lord Howe Island species, mainly in the form of the sculpture, the differences being especially marked when young shells of each are compared. The sculpture in C. analogia consists of coarse sharply carinated radials that are rendered scabrous to nodulose by dense concentric growth ridges, but in C. howensis the radials are flattened, have linear interspaces, and weaker concentric sculpture renders the radials only slightly granulose over the earlier growth stages, the ribbing becoming smooth towards the margin in the adult.

Australia. Lord Howe Island, Roach Islands.