Shell very slender, elongated, acute, pure white, with a glassy polish when fresh, with twenty-eight or thirty whorls when perfect and complete ; nucleus and first nuclear whorl white, polished, smooth, flattened on top; surface passing gradually into the second nuclear whorl, with two strong narrow projecting smooth keels, which are then continued into the normal sculpture which they assume very promptly; the keels project so much that the diameter of the keeled whorl is slightly larger than that of the tubercled third whorl; spiral sculpture consisting of two rows of round, pointed tubercles and a narrow, flattened hand on each edge of the whorl ; the latter occasionally a little waved, but usually smooth, one before and one behind the suture joining so closely that the suture is practically invisible, or appears only under a strong magnifier like a faint groove on the joined surfaces of the (really double, but apparently single) narrow band; there are sixteen tubercles on the last turn, and those on the anterior row are opposite the interspaces of the posterior row, thus failing into oblique series from right to left across the whorls ; the bases of the tubercles are connected spindly and transversely by small ridges, and the tubercular rows are much more elevated above the general surface than the sutural bands ; there is on the flattened base a single faint thread just within the periphery ; a very young specimen, however, shows several additional inner striae; none of the specimens have the mouth in its adult form, consequently, as in immature specimens of this genus generally, the base is flattened, and the canal short and straight, the pillar without callus, and the outer lip simple, thin, and not projecting; the transverse sculpture additional to the above is solely composed of the lines of growth, which are hardly evident, except on the base ; outline of the spire a very elongated cone, which in old and decollated specimens assumes a subcylindrical form. Lon. of shell, 12.0; of last whorl, 1.5 ; of aperture (immature), 0.0. Max. lat. of shell, 1.87 mm. This species has a sculpture somewhat like Triforis ruber Hinds, from New Ireland ; but the tubercles are alternate instead of opposite, and the form and coloration are quite distinct. Indeed, they would fall into different sections according to Hind's classification.