Shell resembling B. limnoideum in minor sculpture, but with six or seven obscure ribs on the penultimate whorl, hardly reaching the periphery. three strong spirals on the whorls, the last just above the suture and the fasciculi of the spire elevated until they resemble striated threads; color pale livid-brown, without color-bands; whorls eight; outer lip thin, slightly expanded, and in front thickened with a white border; throat brownish; body and pillar glossy, not callous; canal short, wide, recurved with a strong fasciole with a groove behind it, but no keel. Long, of shell, 38; of last whorl, 25; of aperture, 17; max. diam., 17 mm. (Dall.)
TYPE in United States National Museum, No. 110533. Type locality, Station 4779, on the Petrel Bank, Bering Sea.
RANGE. Petrel Bank, Bering Sea, in 43-54 fathoms.