Shell conical, angled at periphery, perforate, brown, covered with a dark-fuscous, ragged epidermis. Sculpture consisting of oblique, very irregular, radiate, and rather distant plaits, produced into triangular membranaceous processes at and sometimes below the periphery ; base with fine radiate threads crossed by fine spiral striae, which, however, are mostly subobsolete. Colour uniformly brown. Epidermis thin, processes easily worn off. dull. Spire acutely conical, very little higher than the aperture. Protoconch small, papillate, of 2 smooth, strongly convex, and dark-brown shining whorls. Whorls 6, rather flattened, the last angled at the periphery ; base flattish. Suture impressed. Aperture rather oblique, broadly ovate. Peristome thin, regularly arched, or slightly angulated at the periphery, very little callous inside ; very slightly patulous. Columella slightly oblique, arcuate, callous inside, and slightly expanded toward the narrow but open perforation ; there is no parietal callosity. Operculum horny, of 5 whorls ; nucleus subcentral. Diameter, 2,75 mm. ; height, 3,25 mm.
Animal: Rostrum emarginate ; tentacles short, slightly tapered, and rounded at the ends ; the eyes on slight bulgings at their bases ; foot short, not produced much beyond the operculum ; tail rounded. Body and foot brown : tentacles and a band on each side of the head purple; rostrum broadly margined with white, and the tentacles minutely tipped with the same colour. (Hutton.) New Zealand: Greymouth (R. Helms).