Original description.
Shell sinistral, elongate-conic, chestnut brown. (Nuclear whorls decollated.) Succeeding turns separated by strong channeled sutures, ornamented on the fii-st five turns by a double spiral row of tubercles which are separated by a channel a little wider than the tubercles. Beginning with the sixth tiu'n, a slender, spiral, faintly tuberculate keel, placed a little nearer the posterior than the suprasutural row of tubercles, makes its appearance in the channel. This keel remains slender and does not quite attain the strength of the suprasutural one, even on the last turn. The tubercles are joined spirally by quite strong connections and axially by moderately strong riblets. The spaces inclosed by these joining elements appear as elongated pits, of which the axial axis is the longest. There are sixteen tubercles upon the second and twent3^-two upon the penultimate turn. The tubercles, as well as their spiral connections, are somewhat excavated posteriorly, but well rounded anteriorly, and the posterior row "of tubercles is considerably more strongly developed than the suprasutural on the last five turns. In addition to the sculpture descril)ed, the entire surface of the spire, tubercles, and intertubercular spaces are marked by slender lines of growth. Periphery of the last whorl, marked by a tubercular cord, a little less strongly developed than the suprasutural one. Base rather elongated, marked b}' two rather broad, low, spiral cords, the anterior one of which is partly situated upon the columella. The well rounded channel, which separates these keels, as well as the supraperipheral channel, are crossed by weak continuations of the axial riblets. Aperture decidedly channeled anteriorly, posterior angle obtuse; columella thick and twisted, covered with a thick callus, which extends over the parietal wall.