The postnuclear whorls are moderately well rounded with strongly developed axial ribs, which begin weakly at the summit of the whorls and become strongest at about the anterior termination of the posterior third, again gradually weakening on the base and evanescing on the columella.

Ten occur upon all but the body whorl, which has twelve There is a very strong varix a little distance behind the outer lip.

The lines of growth are exceedingly fine, and the spiral sculpture is absent on all but the columella, thus giving to the entire surface of the shell a decidedly glassy appearance.

The outer lip from the channel to the slender notch anteriorly is protracted into a clawlike element.

The inner lip is appressed to the columella as a heavy callus that extends over the parietal wall and forms a decided knob over the posterior angle.