The relatively smooth shell epidermis is colored brown to dull yellowish green. Faint, green, broken, chevron-shaped rays are sometimes seen lining the shell and serve as a useful identification feature if present; but are commoner and brighter on young specimens. In older specimens, the raying is often non-distinct and sometimes completely absent. The nacre is bluish-white or creamy. In the left valve are two equally long, stout, triangular pseudocardinal teeth; and two short, slightly curved lateral teeth. In the right valve are one strong tooth in front of the umbo and one smaller tooth before it.