Original description.
Shell elongate-conic, almost cylindric, bleached, white. (Early whorls decollated.) Later turns ornamented by three spiral ridges, of which the posterior one is a little more strongly developed than the other two and forms the summit of the whorls. The other two spiral ridges are equal and equally spaced. In addition to the spiral ridges, the whorls are marked by axial ribs, about as strong as the spiral ridges, the intersection of the ribs and ridges forming strong tubercles, while the spaces inclosed between them appear as deeply impressed square pits. There appear to be about twenty-two tubercles upon all the whorls. The sutures appear as broad, deep channels, which are crossed by the extensions of the axial ribs. On the last three turns the posterior edge of the peripheral keel is apparent in the suture. In addition to the above sculpture, the entire surface of the spire is marked with microscopic lines of growth and equally fine spiral striations. Periphery of the last turn marked by a strong spiral keel. Base marked by two strong rounded keels, of which the posterior one is separated about as far from the peripheral keel as that is separated from the supraperipheral one. The anterior keel of the base is situated on the columella and is separated by a little wider and deeper channel from the posterior keel tlian that is from its posterior neighbor; anteriorly it is limited by a feebly impressed groove. The channels of the base are crossed by weak continuations of the axial riblets. Aperture ovate, strongly channelled anteriorly and moderately so posteriorly; columella short, stout, and twisted; covered by a strong callus which also extends over the parietal wall.