Characteristics: Maximum reported size: 19 mm. This solid, ovate, moderately elevated shell is usually slightly arched and rests on its ends. The exterior is mostly white, and is covered by brown radial rays. On smaller shells, these rays may be visible on the interior. The soft parts of the animal are mostly yellow with thin lines of live-brown or purple-brown on the head and flanks. The orifice is located near the center of the shell, is ovate, and is constricted at both ends.