P L A T E X 1 r . 



MIOCENE I'ECTENS. 



[Unless ulluTU ise statf<l all liguros aru ai>proxiin}iti;ly natural size.] 



Page. 



Fk;. 1. Pecten {Lfiropecteu) /lOHrr.si ii. sp. U. C. Typi' 70 



Exterior of slightly imperfect rifiht valve; altitude loO nun. Miorene (lower), Santa 



Inez Canyon, Santa Barbara County, Cal. (.M. H. ) 



Fk;. 2. Peclm (Lyro/icrli-ii) luiirfrsi n. sp. D. A 70 



Exterior of iiiulm ami i ais ( the anterior somewhat imperfeet) of a right valve; hinge line 



restored 8ti mm. Mmeene (lower), Santa .Monu'a Mountains, Ventura County, Cal. 



(M. P.) 



168 



