P T. .V T E X X T T T T . 



MIOCENE AND PLIOCENE I'EITENS. 



[tinli'ss otherwi.'-e sliitt'il all tiKin'fs are approximately iiatiira! size.] 



Page. 



Kiii. 1. Pecten (AmtisUim) lomporomx n. sp. C. \. S. Tyjie ll'i 



Mold of interior of left valve- altitude Id.'i nun. pliocene, 4 miles south of Lompoc, 

 Santa Barbara County, Gal. (M. B. ) 



Fk;. 2. Pecten ( Aiiiiisiiiin ) loinpocciinif: n. sp. U. S. N. M. 164852. Cotyiie 92 



Interior of a portion of a left valve; altitude 90 mm. Miocene (lower), (»jai Valley, 

 Ventura County, Cal. ^M. r>. ) 



Fi(i. 8. Pecten (Amusium) lompoceiisis n. ^\i. C. .\. S. Cotype 92 



Im]ierfect mold of interior of rii;lit valve; hinge line 42 mm. Same locality as lifr. 1. 

 (il. B.) 



Fio. 4. J'cclcn { Pneudamnxiuin) pednMiiiiis Trask. I'. S. N. M. 1()4S40 90 



Exterior of imperfect left valve; altitude :10 nun. Lower Pliocene, Tliini street tunnel. 

 Los Angeles, Cal. (M. B. ) 



Fiii. 5. Pecten (Pseiidamiiahim ) peilrodiiiis Trask. V. S. N. M. 104840 90 



Exterior of right valve and young left valve: altitude of former. 22 inni. Same locality as 

 fig 4. (M. B.) 



200 



