Shell small, subulately elongated, imperforate, solid, polished. Sculpture : The protoconch is microscopically finely spirally striate, the interstices minutely punctate ; the following whorls show traces of microscopic spiral striation, otherwise they are smooth ; the oblique close and fine growth-lines are distinctly visible under the lens. Colour of the upper whorls purple or purplish-red, the last whorl usually of a lighter colour, mostly yellowish ; a light band below the suture. Spire elevated conic, twice the height of the aperture, outlines straight. Protoconch small, globose, of 1,5 convex whorls. Whorls 6, regularly increasing, flat; base rounded. Suture not deep. Aperture rounded, sub-vertical. Peristome continuous, much thickened inside, and slightly expanded. Columella short, very callous and reflexed. Operculum unknown.
Diameter, 1,25 mm. ; height, 2,5 mm.
Hab.—Stewart Island (type) ; Port Pegasus, Stewart Island, in 18 fathoms (Captain Bollons) ; Foveaux Strait; Cook Strait ; Omaha (C. Cooper) ; near the Snares Islands, in 50 fathoms (Captain Bollons) ; Dusky Sound, in 30 fathoms (R. Henry). Also Victoria.