Shell fusiform, solid and heavy, of five and a half whorls, the last much the largest; suture subcanaliculate, not deep, but very distinct; whorls moderately convex, somewhat appressed toward the suture. Canal rather long, much recurved ; aperture elongate, acute behind; inner lip much thickened, white; outer lip hardly thickened, posteriorly waved. Shell covered with a yellow-brown epidermis, with very faint revolving striae, crossing the slightly evident waved lines of growth. Long., 1.7 inch; lat., 0.8 inch; Long. apert. 0.95 inch; defl. 45°.

Shell fusiform, solid and heavy, of five and a half whorls, the last much the largest; suture subcanaliculate, not deep, but very distinct; whorls moderately convex, somewhat appressed toward the suture. Canal rather long, much recurved; aperture elongate, acute behind; inner lip much thickened, posteriorly waved. Shell covered with a yellow-brown epidermis, with very faint revolving striae, crossing the slightly evident waved lines of growth. Long., 1.7; lat., 0.8; long, apert, 0.95 in. (Dall.)
TYPE in United States National Museum. Type locality, Sanborn Harbor, Nagai.
RANGE. Nunivak Island, Bering Sea to San Diego, California, in 65-293 fathoms.

This species is smaller and more solid than most of the genus, and does not resemble any of the east coast species closely enough to require a comparison. It has a little the aspect of a Campeloma, in some of its characters.

Alaska, USA, Sanborn Harbor, Nagai.