Shell small, slender, acute, white, polished, with eight flattish whorls exclusive of the (lost) nucleus; suture obscure, appressed, fasciole immediately adjacent, rather wide, and constricted; spiral sculpture of a few incised lines on the base and threads on the canal; axial sculpture of (on the penultimate whorl about fourteen) low feeble ribs, almost knoblike, stronger on the earlier whorls, but which do not reach the base or cross the anal fasciole and which disappear on the last half of the last whorl where there is a moundlike varix and traces of a yellowish spot; aperture small, anal sulcus deep, with a subsutural callus; outer lip thin, sharp, arcuately produced; inner lip and pillar with a thin layer of enamel; pillar short, canal very short and hardly differentiated from the aperture. Height of shell 8,5 mm.; of last whorl 4 mm. ; diameter, 3 mm.

West Coast of Mexico. Mazatlan.