Shell small, elongate-conic, white; nuclear whorls with the tip broken, the two remaining whorls well rounded, rapidly enlarging, the first smooth, the second axially threaded; postnuclear whorls 6, well rounded, separated by a deep suture; axial sculpture of 10 strong, somewhat retractive, rounded ribs which hardly touch in the sutures where they alternate in most cases, interspaces rounded, wider than the ribs; base forming a distinct disk at the upper edge of which both ribs and interspaces terminate; entire surface with fine, wavy, spiral striations which continue over the tops of the ribs and show on the basal disk where they extend to the umbilical region; aperture round, outer lip thickened by the last rib, forming a flattened face with a slightly raised inner edge, columellar lip similarly raised but not as wide as the outer lip. The type measures: length, 7.6 mm.; diameter, 2.8 mm.

The shell of this species differs from that of Epitonium elenense from the Gulf of California, in that it possesses 10 rather than 8 axial ribs.

Near Manzanillo, Mexico.