PLATE XCVII. 



PAGE 



Fig. 1. LiTHOPHAGA suBALVEATA Conrad 364 



1. Exterior of right valve. Shiloh, New Jersey. Acad. Nat. Sci., 



Phila. (After Conrad. Amer. Jour. Conch., vol. II, pi. IV, 

 fig. IV.) 



Fig. 2, 3. LiTHOPHAGA lONENSIS n. sp 364 



2. Exterior of right valve. Jones Wharf. 



3. Exterior of right valve. Same locality. 



Fig. 4. Crenella virida n. sp 365 



4. Specimen from Greensboro. 



Fig. 5. Crenella gubernatoria n. sp 365 



5. Specimen from Governor Run. 



Figs. 6, 7. Modiolus ducatellii Conrad 366 



6. Exterior of right valve. Dover Bridge. 



7. Interior of beak portion of left valve. Cove Point. 



Figs. 8a, 8b. Modiolus virginicus (Conrad) 366 



8a. Exterior of left valve. St. Mary's River. 

 8b. Interior of same specimen. 



Figs. 9, 10. Modiolus dalli n. sp 367 



9. Interior of right valve. Pawpaw Point. 



10. Exterior of left valve of same individual. 



Figs. 11, 12. Modiolus ionensis n. sp 368 



11. Exterior of right valve. Jones Wharf. 



12. Interior of left valve of same individual. 



Fig. 13. Modiolaria curta n. sp 368 



13. Exterior of right valve. Plum Point. Cornell University. 



