Shell small, perforate, globose-turbinate, rather thin, lustreless. Sculpture consisting of fine, regular, close spiral lirae, about 18 on the penultimate whorl, crossed by fine oblique growth-lines. Colour whitish, tinged with yellow, unicoloured, or marked with a few angular radiating maculations of brown. Spire short, outlines convex. Protoconch small, consisting of 2 convex and microscopically spirally striate, whorls. Whorls 4J to 6, flatly convex, narrowly shouldered in New Zealand specimens, the last obtusely angular at the periphery : base convex, impressed around the umbilicus. Suture impressed. Aperture oblique, rounded ovate, angular above, broadly rounded below, with a thin iridescent layer of nacre within. Outer and basal lip thin, inside with a narrow white callus. Columella oblique, slightly concave. Inner lip spread out over part of the umbilicus and the parietal wall. Umbilicus narrow.
Diameter, 5-5 mm. ; height, 6 mm. Diameter, 7 mm. ; height, 8 mm. (New Zealand specimen of 6 whorls).
Type in the Tasmanian Museum, Hobart. Hab: — Lyall Bay (A. Hamilton).
Remarks.—The two New Zealand specimens in my collection are distinctly shouldered, and the last whorl is more distinctly angled than in Tasmanian specimens, but otherwise there is no difference. These differences are too slight to separate the New Zealand form as a subspecies.