PLATE CI I. 



PAGE 



Figs. 1, 2. OsTREA PERCRASSA Conrad 382 



1. Exterior of upper valve. Magruder Perry. x % 



2. Interior of lower valve. Same locality. X % 



Fig. 3. Melina maxillata (Deshayes) 383 



3. Exterior of right valve. Plum Point. X % 



