Shell elongate-conic, light chestnut brown, except the nucleus and the early postnuclear whorls which are wax yellow, with the posterior row of tubercles on each turn flesh colored. Nuclear whorls 31, the first half smooth, the remainder marked by two slender spiral threads, which are placed anterior and posterior to the middle of the whorls, leaving a narrow space between them about one-half the width of that between the summit and the first spiral thread below it. In addition to the spiral threads, these whorls are marked with slender axial riblets, which curve strongly, rotractively from the summit to the first spiral thread, crossing the space between the two spiral threads in a straight, retractive line, then continuing over the anterior portion of the wall in a slightly curved, protractive manner. These riblets are very feeble on all but the last nuclear whorl, on which they are much stronger. On this there are 34. Postnuclear whorls flattened. The first four are marked with two strong spiral cords, of which one is immediately below the shouldered summit, while the other is a little above the suture. Beginning with the fifth, a slender spiral cord makes its appearance half way between the other two. This increases rapidly in size and on the seventh is equal to the others. In addition to this spiral structure, the whorls are marked with strong axial ribs, of which 16 occur upon the first, IS upon the second to sixth, 20 upon the seventh to ninth, and 22 upon the penultimate turn. On the first four whorls, the junction of the axial ribs and spiral cords form strong, rounded tubercles on the cord at the summit, while at the, anterior cord the tubercles are truncated posteriorly and slope gently anteriorly, the whole having a somewhat dumbbell shape. On the remaining cords the same structure applies to the shape of the tubercles of the first and third cords, while on the median cord of the fourth and fifth whorls the tubercles are elongate-oval, having their own axes parallel with the spiral sculpture. On the remaining cords, the. tubercles and the median cords resemble -those of the supraperipheral cord. The spaces inclosed between the spiral cords and the axial ribs are large, well impressed, squarish pits on the first four turns, while on the remain-in" turns they appear as rounded pits. Sutures strongly impressed. 1'cripherv of 'the last whorl marked by a smooth spiral cord, which is separated from the supraperipheral cord by a groove about as wide as that which separates the supraperipheral cord from its posterior neighbor, and crossed by the continuations of the axial riblets which terminate at the posterior border of the peripheral keel. Base moderately long, well rounded, marked by three, strong, broad, low, rounded, equally spaced, spiral cords, which are separated by narrow, rounded, impressed channels. The last one of these is partly upon the columella. Aperture irregular, decidedly channeled anteriorly; posterior angle obtuse; outer lip rendered sinuous and irregular by the external sculpture; columella covered with a very thick callus which is reflected over the base and extends over the parietal wall.
The type and another specimen, Oat. No. 186804a, U.S.N.M., come from Port Alfred (Coll. No. 170). The typo has 13,5 whorls, and measures: Length, 5 mm.; diameter, 1.7 mm. Cat. No. 227717, U.S.N.M., contains six specimens from the same locality (Coll. No. 812). Cat. No. 249079, U.S.N.M., one specimen from same locality (Coll. No. 951).