Shell resembling B. turtoni in size, but with a more regularly tapered spire and deeper suture; the epidermis of a redder brown and not polished; very adherent; the sculpture is of close-set pairs of flattened spiral threads, each pair separated by a sharp channeled groove, as wide as a thread, from the next pair, and a very narrow but sharp groove between the two threads composing the pair; transverse sculpture only of fine incremental lines; nucleus lost; aperture snow-white within; not lirate, though the external sculpture is reflected slightly close to the edge of the outer lip, which is slightly expanded; canal very short and wide; whorls six and one-half without the nucleus; operculum normal, very large, closing the aperture. Length of shell, 124; whorl, 80; max. diam., 55 mm. (Dall.)
TYPE in United States National Museum, No. 106988. Type locality, Station 3497, in Bering Sea, near the Pribilof Islands.
RANGE. Pribilof Islands, Bering Sea.