Shell large, elongate-conic, white. Nuclear whorls small, vitreous, planorboid, deeply obliquely immersed in the first of the succeeding turns, above which only the tilted edge of the last volution is visible. Post-nuclear whorls increasing regularly in size, well rounded, very narrowly roundly shouldered at the summits, which renders the sutures well marked. Periphery of the last whorl somewhat inflated. Base well rounded, attenuated anteriorly to reenforce the columella. Entire surface covered by numerous somewhat wavy, subequal and subequally closely placed spiral lirations, of which about 40 occur between the summit and the periphery and about an equal number on the base of the last whorl. Aperture large, decidedly patulous ante riorly: posterior angle acute; outer lip thin at the edge, very thick within: columella curved and strongly reflected, free only at its anterior extremity, provided with a strong oblique fold at its insertion.
The type and 5 specimens (Cat No. 126658, U.S.N.M.) were collected by Dr. C. F. Newcombe at Victoria, Vancouver Island, British Columbia. It has 6 post-nuclear whorls and measures: Length 8.3 mm., diameter 4.2 mm. Three other specimens (Cat No. L96245, U.S.N.M.) were dredged by the Bureau of Fisheries steamer Albatross at Station No. 4213, off Port Townsend, Washington, in 23 to 25 fathoms, gray sand and broken shell, bottom temperature 51°. Another (Cat. No.-196246, U.S.N.M) at Station No. 4203. at Fort Rupert. Vancouver Island, British Columbia, in 25 to 30 fathoms, volcanic sand and gravel and broken shell and sponge, bottom temperature 49.1°.