Length 46 mm, height 24 mm, breadth 15 mm. Shell elongated oval, broadening posteriorly, thin and fragile. Beaks anterior. Both anterior and posterior margins round, and dorsal and ventral margins straight. Surface with shining, pale greenish periostracum with a yellowish brownish blotch near ventral margin. Intererior silvery white. Slender ligament along the dorsal margin.