PLATE LXXXVII. 
PAGE 
Figs. 1-4. SOLECAKDIA ( SPANIORINUS) COSSMANNI Dall 323 
1. Interior of right valve. Miocene of Virginia. U. S. National 
Museum. (After Dall.) 
la. Hinge of left valve. Same locality and collection. (After Dall.) 
2. Interior of right valve. Cove Point. 
3. Interior of left valve. Same locality. 
4. Exterior of right valve. Same locality. 
Pigs. 5a, 5b. Sportella vifHiTFiELDi Dall 324 
5a. Interior of right valve. Plum Point. 
5b. Exterior of same valve. 
Fig. 6. Sportella pelex Dall 325 
6. Interior of right valve. Miocene of Virginia. U. S. National 
Museum. (After Dall.) 
Fig. 7. Sportella petropolitana Dall 325 
7. Interior of right valve. Petersburg, Virginia. U. S. National Museum. 
(After Dall.) 
Pigs. 8-10. Sportella recessa n. sp 326 
8. Interior of left valve. Cove Point. 
9. Exterior of left valve. Same locality. 
10 Interior of right valve. Same locality. U. S. National Museum. 
Fig. 11. Sportella patuxextia n. sp 326 
11. Interior of right valve. Cove Point. 
Figs. 12a-13. Hixd.siella acuta Dall 326 
12a. Interior of left valve. St. Mary's River. 
12b. Exterior of same specimen. 
13. Interior of left valve. Miocene of North Carolina. U. S. 
National Museum. 
Figs. 14, 15. Erycina (Pseudopythina?) Americana Dall 329 
14. Exterior of right valve. Calvert Cliffs. U. S. National Museum. 
(After Dall.) 
15. Interior of left valve. Same locality and collection. (After 
Dall.) 
Pig. 16. Erycina calvertensis n. sp 327 
16. Interior of right valve. Plum Point. 
Pig. 17. Erycina prtjna n. sp 327 
17. Interior of right valve. Plum Point. 
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