238 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Ostrea diifpirUin, Couiiid, pi. Ixvi, figs. 1, 2 312 



Ostrea panzana, Conrail 31.3 



Ostrea percraasa, Conrail, pi. Ixvii, fig. 3 iU 



Ostrea gculpliiTata,ConT-A([, pi. Ixx, flg. 2 313 



Ostrea fubfalcata, Courad, pi. Ix viii, figs. 1-3 313 



Ostrea subjecta, Conrad 313 



Ostrea tayloriana, Gabb, pi. Ixvii, figs. 1, 2 313 



Ostrea titan. Conrad 313-314 



Ostrea cclcriana, Conrad, pi. Ixx, flg. 1 314 



Ostrea virgin ica, Gnielin (—0. virginiana, Lamarck) 314 



PLIOCENE. 



Ostrea atwuodi, Gabb 314 



Ostrea hourgeoisii, R6niond, pi. Ixxi, fig. 1 214 



Ostrea heermanni, Conrad 314 



Ostrea vespertina, Conrad, pi. Ixxi, figs. 2-4 315 



P08T-PL10CENE. 



Ostrea conchaphila, Carpenter 315 



Ostrea fundala (Say >),¥. S. Holmes 315 



Ostrea gallus, Valenciennes 315 



Ostrea lurida, Carpenter, pi. Ixxii, figs. 2, 3 316 



0«<rea veatcAu, Gabb, pL Ixxii, flg.l 316 



