Shell small, ovate, pellucid white, sometimes with irregular radial opaque white narrow streaks; moderately convex, with a very thin, pale straw-colored epidermis; very inequilateral, the posterior side short; beaks distinct, the prodissoconch often conspicuous; surface polished, sculptured only with faint incremental lines and obscure, irregular microscopic radial striae; right valve with the anterior and posterior lamellae short and strong, with a marked sulcus above each of them, the anterior with a conspicuous hook; resilium well developed, but short; adductor scars small, narrow, pallial scar linear. Long. 3.75 , alt. 2.8, diam. 1.5 mm.

The strong laminae and the deep sulci above them give this species, when casually observed, the look of a Mysella.

Dredged off Fernandina, Florida.