PLATE cm. 



PAGE 



Fig. 1. Melina maxillata ( Deshayes) 383 



1. Interior of broken valve showing hinge and ligament grooves. 



Jones Wharf. x % 



Figs. 2, 3. Atrina harrisii Dall 384 



2. Exterior of right valve. Pawpaw Point. x % 



3. Exterior of decorticated right valve. Jones Wharf. U. S. National 



Museum. (After Dall.) X % 



