Shell yellowish white, thin, of about six moderately rounded whorls, the nucleus eroded; suture distinct; spiral sculpture on the early of two strong cords one on each side of the periphery, between which are first one, later two, and finally four smaller threads; the posterior cord gives the whorl a slight shoulder; on the last whorl in front of the anterior cord to the end of the canal are smaller, more or less alternate flattish cords, close-set, the interspaces wider on the canal; axial sculpture of (on the penultimate whorl about 20) rounded sigmoid ribs with wider or subequal interspaces, crossing the early whorls, becoming less evident on the later whorls, and obsolete on the base of the last whorl; the incremental lines are more or less evident; aperture narrow, simple; pillar white, erased, attenuated in front. Height of shell, 11; of last whorl, 7; diameter, 4 mm. (Dall.)

Type locality, Plover Bay, Bering Sea.
RANGE. Plover Bay to Boca de Quadra, Alaska.