Shell almost evenly conical, sutures shallow, whorls very flattened, somewhat sunk into each other, with fine spiral ribs at a distance from each other of two to three times the rib's own width, nearest the aperture they are crossed by sharper growth lines. Columella shows on one specimen a sharp edge. Operculum pear-shaped with terminal nucleus. Epidermis yellowish-green on two specimens and olive-green on a third specimen. Throat and columella are brownish-yellow; the latter with white lines and spots, the edge of the aperture is white and smooth, not blue with striations as Euthria viridula to whose var. Fasciata Dunker (Moll. Jap., tab. 3, fig. 5 and 6) this form shows wavy form likenesses. (Translation.)
TYPE in Zoology Museum, Copenhagen? Type locality not known to writer.
RANGE. Arctic Ocean north of Bering Strait; circumboreal.