Shell, elongate-conic, greyish-white outside and dark purplish-brown within. Nuclear whorls at least two, apparently smooth: worn in all the specimens. Post-nuclear whorls slightly rounded, ornamented with three strong, equal, and equally spaced, nodulose, spiral keels, of which the first is a little below the summit. The spaces separating the spiral keels arc of equal widths. Immediately below the third keel is a strong peripheral sulcus, which equals those between the spiral keels. In addition to the spiral sculpture, the whorls are marked by almost vertical, axial ribs which are not quite as wide as the spiral keels. These render the keels nodulose at their intersection. Of these ribs, twelve occur upon the first, fourteen upon the second and third, sixteen upon the fourth, eighteen upon the fifth, twenty-four upon the sixth, and thirty upon the penultimate turn. The spaces enclosed between the spiral keels and the axial ribs are well impressed, rounded pits. All the tubercles are truncated on the posterior margin, and slope gently anteriorly. Base of the last whorl moderately long, ornamented with seven spiral cords, of which the two immediately below the periphery arc the strongest and broadest, while the two bounding the umbilical area are wider than those intervening. Sutures channeled. Aperture irregular, channeled anteriorly; posterior angle obtuse; outer lip thin, sinuous, showing the external sculpture within; columella stout, short, twisted and reflected; parietal wall glazed with a moderately thick callus The specimen figured has eight post-nuclear whorls, and measures:
length, 7.8 mm., diameter, 2.7 mm.
Specimens of this species were dredged in 8 to 27 fathoms from Ueluelet to Ship channel. Barkley sound, Vancouver island. B.C. Part of these are in the collection of the Geological Survey. Ottawa, and others are in the United States National Museum collection, Catalogue No. 211545.