Shell fusiform. Colour orange-buff, with a rosy apex. Whorls live, plus the protoconch. Sculpture: on the last whorl are six roundly swelling arcuate ribs, which arise at the suture and terminate at the basal constriction, but disappear on the final half whorl ; the anti-penultimate has thirteen ribs. On ascending the spire, the ribs become comparatively more prominent, and on the earliest whorl are sharply constricted and angled at their upper third. On each whorl they alternate with those above and below. Between the ribs appear delicate and evenly-spaced, spiral grooves. Seven or eight broad, close, flattopped lyrae are obliquely wound around the base. Protoconch two-whorled, globose, projecting on the right side, smooth ; anteriorly a spiral groove forecasts the constriction of a later whorl. In the unique specimen the lip is broken. The columella bears a tubercle at the posterior angle, it is then excavated; the moderately straight pillar carries four, conspicuous, projecting plaits; a callus is spread over the preceding whorl. The throat is on its outer wall corrugated by a dozen raised spiral lines. Length 6, breadth 2,5 mm.
Taken by the tangles hauled up on the outer western slope of the atoll, in eighty to forty fathoms, associated with Gorgonidce, Thetidos, etc. This species is a member of the subgenus Pusia, and seems well defined by the uniform colour, smooth, wave-like ribs, and basal constriction.