P L A T E r Y . 



MIOCKXK AND PLIOCENE PECTENS. 



[Unless (itluTwisc sditi'd all liy:iires jiri- apprdxiiiiattdy natural size] 



Page. 



Fill. 1. Prcteii (Peden) c<irri:i)e)i!<is n. ><[>. I). A. Tyjn'.. 59 



ICxterior of right valve; iiltitude 36 inm. Ciirri/.o formation (Miocene), Alversou C'an- 

 yon, San Diego County, Cal. ( M. B. ) 

 Fui. 111. Same specimen as fig. 1 59 



Exterior of left valve. 

 Fiii. 1 /'. Same specimen as fig. 1 59 



Profile of both valves vievveil from rear. (M. P.) 

 Fic. -. Pri-teii {PiTteii) c(trriziienxiii 11. gp. U. S. N. M. 164847 59 



ICxterior of left valve; altitude 63 mm. Miocene, Santa Rosalia, Lower California. (M. P.) 

 Fi(i. :!. JWIcn ( Pi-i'teii ) nin-lzoeiixis n. sp. U. 8. N. M. 164848 59 



E.xterior of imperfect right valve; longitude 44 mm. Same loi'ality as lig. 2. (M. B. ) 

 Fn ;. '.'ill. Same specimen as fig. 3 59 



Profile of right valve viewed from front. (M. P.) 

 Fio. 4. Pecten {Pecten) corduKjaensln n. sp. L. S. J. U. Type 97 



E.xterior of slightly distorted riglit valve; altitude 47 mm. Lower Pliocene, Coalinga, 

 Fresno County, Cal. (M. B. ) 

 Fk;. 4'i. Same specimen as fig. 4 97 



Profile of right valve viewcil from rear. ( ^L P.) 

 Fig. 5. Peclen (Pecten) coaHnyaeniin n. sp. C. A. S. Cotype - 97 



Exterior of left valve; altitude 35 nnn. Lower Pliocene, Kreyenluyjen's ranch, Fresno 

 County, Cal. (S. ) 



152 



