P L A T E XIX. 



MIOCENK PECTENS. 



[Unless olhurwise stiitcd all liiiurcs nrv nppnixinuik-ly luUiiral size.] 



Page 



Fig. 1. Peiii'ti { Li/roperleii) rKtrc/liniii.i ('i)nrail. l'. S. \. M. l(;4S."il 74 



E.xteiMcir of left valve; altitude i)7 iiiiii. Santa Mar^jarita fi>iiiiatiiiii (ut>per iMicu'eiic), 

 Wililhor.se Caiiyoii, ^lonterey Cimnty, Cal. (.M. H. ) 



Fig. \ii. Same S]>eciiiien as tis. 1 74 



Interior "f left valve. (M. B. ) 



182 



