Shell subcircular, high, conical, sculptured, with twelve or thirteen broad whitish radiating ribs, between which occur one or more whitish radiating bands, the interstices being of a blackish-brown colour ; apex very posteriorly situate, slightly overhanging; margin of shell painted with brownish black alternating with whitish, slightly produced both anteriorly and posteriorly, so that the shell does not lie quite flat when placed upon a plane; spatula whitish, not well defined posteriorly, anteriorly broadly margined with rich blackish brown, Concentrically painted, especially towards the base, with elongate blotches of pure white; below the spatula the shell shades from yellowish to bluish white, the surface being marked with multitudinous, interlacing, scratch-like striae.
Alt. 12, diam. maj. 15 mm.
Hab. Falkland Islands (A, G. Bennett).