P L A T E X X X V . 



PLIOC^EN K PKt'TENS. 



[Tnlt'ss (itluTWis*- stHted all Ii;^uri's arc apprfixinmlcly iiiitiiral size.] 



Page. 



Fk;. 1. Pci-lni i I'liliiinjniieii) /iitrit!iiiiaennifi n. sp. D. A. Type 10") 



Exti'iiiir iif a tiliglitly imperfect right valve; altitude ll'3 uni]. I'urisima furmatinii 

 (lower Pliocene), iiDrtli of tin- lUdiith of Pescadcro ('reek, Sail Mateo CdUiity, Cal. 

 (M. K.) 



Kii;. III. Same specimen as lig. 1 10") 



Prolile (j[ botli valves as viewed fnuii the rear. (M. P.) 



Fiii. '2. Pc'-liii { I'dliiiD/jccIni) liiniiri n. s|i. L.S.J. I'. Type Iflti 



F,xteri(ir of an imperfect right valve: altitude ti5 mm. Plidcene, Tomales Bay, Marin 

 Cmmty, Cal. (M. B. ) 



Fill. :i. Prrtiii ( Paliniijn'rli'ii) liinierl n. sp. L. S. ,1. I". ('cityi>e 10(i 



Fxterior of a |iortion of a right valve showing sculpture; altitude of fragment -IS nun. 

 IM. B. ) 



2U 



