growth-lines. Colour white, slightly yellowish. Spire conic, a little higher than the aperture; outlines but faintly convex. Protoconch heterostrophe, oblique, of 1 smooth and convex whorl. Whorls 4, regularly increasing, flatly rounded; base moderately convex. Suture impressed. Aperture a little oblique, oval, angled above, narrowly effuse below. Outer lip thin and sharp. Columella vertical, arcuate, with a small plait above, which is deep within the aperture; inner lip extending a little beyond the columella, with a sharp edge, slightly broadening below; not spreading over the parietal wall. Operculum normal.

Diameter, 1.6 mm.; height, 3 mm.

Type in my collection.

Hab.—Te Onepoto Bay, near Lyttelton, type (T. Iredale); Queen Charlotte Sound, in 16 fathoms (Captain Bollons).