PLATE XC. 



PAGE 



Figs. 1, 2. Phacoides (Pseuiiomiltha) foremani (Conrad) 336 



1. Interior of left valve. Plum Point. 



2. Exterior of right valve. Same locality. 



Figs. 3, 4. Phacoides (Pseudomiltha) anodonta (Say) 337 



3. Interior of left valve. Jones Wharf. 



4. Exterior of right valve. Same locality. 



Figs. 5, 6. Phacoides (Lucinoma) contractus (Say) 339 



5. Interior of left valve. Pawpaw Point. 



6. Exterior of right valve. Same locality. 



Pigs. 7-9. Phacoides (Here) trisulcatus (Conrad) 337 



7. Interior of left valve. Plum Point. 



8. Exterior of right valve. Same locality. 



9. Interior of right valve. Same locality. 



Figs. 10-12. Phacoides (Parvilucina) crenulatus (Conrad) 340 



10. Interior of left valve. Cove Point. 



11. Exterior of right valve. Same locality. 



12. Interior of right valve. Same locality. 



Fig. 13. Phacoides (Parvilucina) prunus Dall 340 



13. Exterior of left valve. Plum Point. U. S. National Museum. 



(After Dall.) X 3. 



