Shell large, elongate-ovate, strongly umbilicated, yellowish white. Nuclear whorls deeply immersed in the first of the succeeding turns, above which only the tilted edge of the last volution projects. Post-nuclear whorls well-rounded, feebly shouldered at the summit, marked by fine incremental lines and numerous exceedingly fine, closely-spaced, spiral striations. Sutures moderately constricted. Periphery of the last whorl inflated, well-rounded. Base moderately long, well-rounded, openly umbilicated. Aperture oval, effuse anteriorly. Posterior angle obtuse; outer lip thin; columella very oblique, slender, curved, and decidedly reflected, not reinforced by the base, provided with a moderately strong fold a little anterior to its insertion; parietal wall glazed with a thin callus.
The unique type of this species, which is in the collection of the Dominion Geological Survey, was dredged by Mr. Spreadborough at Skidegate. It has six post-nuclear whorls and measures; length 5,2 mm., diameter 2,8 mm.