PLATE LXXII. 
PAGE 
Pigs. 1-3. Semele carinata (Conrad) 294 
1. Exterior of right valve. St. Mary's River. 
2. Interior of right valve. Same locality. 
3. Exterior of left valve. Same locality. 
Figs. 4, 5a, 5b. SEjrELE carinata var. compacta Dall 294 
4. Exterior of right valve. St. Mary's River. 
5a. Interior of right valve. Oligocene of Oak Grove. Fla. 16. 5 mm. 
(After Dall.) 
5b. Exterior of valve of Fig. 5a. (After Dall.) 
Pigs. 6-8. Semele subovata Say 295 
6. Exterior of right valve. Jones Wharf. 
7. Interior of right valve. Same locality. 
8. Exterior of left valve. Same locality. 
Figs. 9a, 9b. Aura longicali.a (Scacchi) 296 
9a. Exterior of right valve. Jones Wharf. 
9b. Interior of same valve. 
Fig. 10. Adra marylandica n. sp 296 
10. Interior of left valve. Plum Point. 
Pigs. 11, 12. Cumi.ngia medialis Conrad 297 
11. Exterior of left valve. Jones Wharf. (?) 
12. Interior of left valve. Same locality. 
Fig. 13. Tellixa .equistriata Say 297 
13. Exterior of left valve. Jones Wharf. (?) 
Fig. 14. Tellin'a (Anoulus) declivis Conrad 298 
14. Exterior of left valve. Plum Point. 
Pigs. 15, 16. Tellina (Angulus) peoihxta Conrad 299 
15. Exterior of left valve. Plum Point. 
16. Exterior of left valve. Cove Point. 
