PLATE LXXVI. 



PAGE 



Figs. 1-3. Chione alveata (Conrad) 310 



1. Interior of riglit valve. St. Mary's River. 



2. Exterior of right valve. Same locality. 



3. Exterior of right valve. Same locality. 



Figs. 4, 5. Vexus rileyi Conrad 304 



4. Interior of left valve. Plum Point. 



5. Exterior of right valve. Same locality. 



Figs. 6-8. Cytherea (Antigoxa) staminea Conrad 314 



6. Interior of right valve. Plum Point. 



7. Exterior of left valve. Same locality. 



8. Exterior of right valve. Same locality. 



Figs. 9-11. Chione parkeria n. sp 310 



9. Exterior of right valve. Two miles south of Parker's Creek. 



10. Interior of right valve. Same locality. 



11. Exterior of left valve. Same locality. 



