PLATE XCVII. 
PiLGE 
Fig. 1. LiTHOPHAGA suBALVEATA Coiirad 364 
1. Exterior of right valve. Sliiloh, New Jersey. Acad. Nat. Sci., 
Phila. (After Conrad. Amer. Jour. Concli., vol. II, pi. IV, 
fig. IV.) 
Fig. 2, 3. LiTHOPHAGA lONENSIS D. sp 364 
2. Exterior of right valve. Jones Wharf. 
3. Exterior of right valve. Same locality. 
Fig. 4. Cbenella vieida n. sp 365 
4. Specimen from Greensboro. 
Fig. 5. Crenella gudernatoeia 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 virgixicus (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. Pav^paw 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. 
