Shell small, thin, acute-fusiform, externally of a grayish color. Whorls about seven, the initial whorl minute and smooth; the second bulbous and smooth; the next, finely reticulated by fine spiral threads, and somewhat protractive arcuate, fine riblets. This sculpture gradually merges into that of the adult whorls; the latter comprise—on the last whorl—eleven or twelve arcuate ribs, retractive from the suture, protractive from the shoulder of the whorl forward of the canal. These ribs are narrow, low, rather rounded, and with interspaces of about twice their own width. The whorl slopes in a somewhat excavated manner from the suture to the shoulder, where there is a moderate angulation, sometimes forming a rather strong, spiral cord; the rest of the surface is covered with very fine, close, even, spiral threading, a little coarser on the earlier whorls; aperture, elongate and narrow; the anal sinus wide and shallow; pillar white, with anterior end attenuated; interior of aperture white, with three brown spiral bands, wide and dark, on the inside of the outer lip, but not visible on the exterior of the shell; the outer lip is sharp except when a varix is formed, when it is slightly reflected inward; operculum none; canal short, straight, and rather wide. Height of shell, 9; of last whorl, 5.3 ; maximum diameter, 2.25 mm. (Dall.)

Type locality, Barkley Sound, Vancouver Island, B.C.
RANGE. Vancouver Island, B.C., to San Diego, California.