Shell large, solid, white, with a coffee-colored periostracum and five or more whorls, the apex in every case being more or less eroded; spiral sculpture of fine, even-channeled grooves, with flattened or even slightly concave wider interspaces covering the whole shell except a space between the suture and the shoulder of the whorls; there are about two grooves and an interspace to a millimeter; axial sculpture of a few feeble, often more or less obsolete, irregular, low plications, not quite reaching the middle of the whorl; suture very deep but not channeled; whorls moderately rounded; base attenuated with a narrow, deep umbilical perforation; outer lip simple, hardly thickened, throat white, smooth, body with a smooth, white layer of callus; pillar concavely arcuate, with six or more feeble plaits, the anterior end of the pillar projecting over a deep notch. Height of shell, 36; of last whorl, 27; of aperture, 20; max. diam., 22 mm. (Dall.)
TYPE in United States National Museum, No. 221473.

Type locality, Plover Bay, Bering Sea, 25 fathoms.
RANGE. Arctic Sea to Pribilof Islands.