Mysella moelleri: Shell rather large for the group, ovate, white,covered by a profuse wrinkled yellow-brown papery periostracum; valves only moderately convex, inequilateral, the anterior part longer and more fully rounded, base convexly arcuate; beaks low, often eroded; teeth of moderate size, the anterior about three times as long as the other in the right valve; pallial scar rather wide and uneven, not sharply distinguished from the adductor scars; resilium short, stout, ventrally calcareous. Long. 6.4, alt. 4.8, diam. 3 mm.