Shell thin, variable in height, the type-speciman short, acute, with five whorls exclusive of the (lost) nucleus, separated by a distinct suture; axial sculpture of (on the penultimate whorl, eleven; on the last whorl, eight) stout ribs with equal (on the spire) or wider (on the last whorl) interspaces; on the spire these extend from the suture ta suture without special prominence on any one part of the whorl, but on the last whorl they are adolescent near the suture and on the base, but on the periphery are very prominent, as if pinched and pulled out, rudely and irregularly; the incremental lines are inconspicuous; the spiral sculpture is like that of the typical form, fine similar uniform striae now and then fasciculated by deeper grooving; aperture wide, outer lip flexuous, thin; body erased, pillar short, straight, canal wide, deep recurved with a strong fasciole. Height of shell, 48; of last whorl, 40; diameter, 36 mm. (Dall.)
TYPE in United States National Museum, No. 332759. Type locality, Point Barrow, Arctic coast of Alaska. RANGE. Point Barrow, Alaska.