The base of the shell is nearly flat, with seven or eight concentric close fine lines, which are crenulated in a peculiarly irregular manner by distinct short oblique impressed marks.

The columella is oblique, nearly straight, with an obsolete, scarcely perceptible fold above, inserted upon the side of the umbilicus, not in its center.

[3] Specimens from rocky shores are often eroded and encrusted with coralline algae, while those from shell, gravel, or cobble substrata are usually clean.

Also occurs in tidal channels at the mouths of harbours, where it grazes over empty shells of pipis.

[4] This marine shell occurs off New Zealand and the Chatham Islands subtidally down to 30m, in a range of habitats.