Shell seven-whorled, turreted, white, with strong waxen yellow epidermis; thin, with strong sculpture; transverse sculpture of, on the last whorl, ten, strong, squarish ribs and numerous fine and occasionally im¬pressed lines of growth; longitudinal sculpture of a distinct angulation of the whorl, in front of the anal fasciole, which on the transverse ribs develops into stout swellings, which in the earlier whorls are connected by an obscure rib; the whole surface of the whorl is covered with rather wide and shallow grooves and their even wider interspaces; the grooves are closest and finest on the canal and behind the angulation, and faintest or nearly absent on the periphery; anal notch very shallow, fasciole nearly obsolete. Operculum short, triangular, yellowish-brown. Greatest length of shell, 12.3; of aperture, 5.5; greatest width of shell, 4.5 mm. (Dall.)
TYPE in United States National Museum.

Type locality, Aleutian Islands.
RANGE. Chiachi Islands to Port Etches, Alaska.