Shell small, rather solid, elongate, slender ; spire elevated, subacute ; whorls, seven to eight moderately rounded ; upper portion of larger volutions somewhat concavely angulated ; suture distinct; color, dark purplish brown or black ; surface covered with rather coarse, inconspicuous, revolving costa, interrupted on the body whorl by rude incremental lines ; middle of upper whorls and upper part of body whorl displaying fourteen to fifteen equidistant, longitudinal, nodose, slightly oblique ribs, which are whitish in the specimen before me (being somewhat rubbed) on the larger whorls ; on the smaller volutions of the spire a puckering at and following the suture suggests a second indistinct series of nodules ; aperture less than half the length of the shell; canal short; terminal portion of columella whitish, slightly twisted ; posterior sinus, rather broad rounded, and of moderate depth.

California. Coast of Pacific Mexico.