Shell ovate, rather thin but moderately solid, yellowish olive-green, the principal spiral ribs typically red-brown with light spots. Spire slate-blue or ashy-purple. Whorls six, the apex slightly mammillar and smooth, the last whorl ventricose, sculptured with numerous very unequal cords and threads, the larger cords widely spaced on the upper half, more numerous below. Over all there is a microscopic sculpture of distinct, fine and close, fold-like growth-striae, and very fine, subobsolete spiral striae. The suture is bordered with weak folds, sometimes stronger and tubercular. The aperture is half-round, glossy, dark chestnut-brown inside, the bevelled and slightly expanded lip cream-white. The basal notch is rather wide and not very deep. Length, 31; diameter, 20 mm. (Dall.)
TYPE in Philadelphia Academy of Natural Sciences, No. 87757; also in Mr. Hirase's Collection, No. 1597a. Type locality, Etoro, Chishima, Kuril Island, Japan.
RANGE. Bering Island, Bering Sea; also Japan.