Shell small, thin, covered with a pale-brownish periostracum, with about five tabulate whorls beside the (lost) nucleus; suture distinct, not channeled; whorl in front of it flattened, beyond the keel at the shoulder moderately rounded; axial sculpture of lines of growth which are at intervals so prominent as to suggest faint ribs; spiral sculpture comprising a marked keel at the shoulder, minutely undulate by the axial riblets, and followed by a wide interval; about eight less prominent spiral threads, separated by successively narrower intervals with microscopic intercalary threads, covering the whole base; aperture ovate, outer lip thin, simple, sharp; body smooth; pillar straight, short, thin, with two plaits, the anterior of which forms the edge of the columella; anterior part of aperture with a distinct, but not deep rounded notch. Long, of shell, 3.5; of last whorl, 2.5 ; of aperture, 1.7; max. diam., 1.8 mm. (Dall.)
TYPE in United States National Museum.

Type locality. Station 3418, off Acapulco, Mexico, in 660 fathoms.
RANGE. North Coronado Island (656 fathoms) to Acapulco.