PLATE XCV. 



PAGE 



Figs. 1, 2. Pandora (Clidiophora) crassidens Conrad 357 



1. Exterior of left valve. St. Mary's River. 



2. Interior of right valve. Same locality. 



Fig. 3. Periploma peralta Conrad 359 



3. Interior of broken valve. Cove Point. 



Fig. 4. Thracia conradi Couthouy 359 



4. Exterior of left valve. Plum Point. 



Figs. 5, 6. Margaritaria abrupta (Conrad) 361 



5. Exterior of right valve. Yorktown, Virginia. 



6. Interior of left valve. Same locality. 



Fig. 7. Pandora (Kennerleyia) lata Dall 358 



7. Exterior of left valve. St. Mary's River {?). U. S. National 



Museum. (After Dall.) 



Fig. 8. DivARicELLA QUADRisuLCATA (d'Orblguy) 341 



8. Exterior. Petersburg, Va. U. S. National Museum. (After 



Dall.) X IVs 



