PLATE III. 



OLIGOCENE-MIOCENE PEC 'TENS. 



[Unless otherwise stilted nil figures iire niipnixiiimtely luitunil size.] 



Page. 



Fig. 1. Prrlt'ii {Prnpedinitsiiim) ddlldmenais n. sp. I'. S. N. M. 164923. Cotype 57 



Imperfect iiiold of exterior of right valve; hinge line 6.5 iiini., X ^i. ( )ligoceiie-Miocene, 

 Lcio. 4070, Bean Point, King Connty, Wash. (M. P.) 



Fi<i. 2. Pn-len (Priijiediniiviitn) chilhiiiietixix w. sp. U. S. N. 1\1. I(i4i)l'2. ('oty)ie 57 



Imperfect mold of interior of left valve; altitmle 7 mm., ■' H. Oligoi-ene-Miocene, Loc. 

 4100, IJ miles east of Pillar Point, Clallam County, Wash. (M. B. ) 



Fig. 3. Pecten {Pmpeamuxmm) dallajnensisn. sp. U. S. N. M. 164922. Type 57 



Mold of exterior of left valve; altitude 10 mm., X 3. Same locality as fig. 2. (M. P. ) 



Fig. 'M. Same specimen as fig. 3 — 5; 



Portion of disk (not mold) enlarged 6 times. 



Fig. 4. Pirteii {Propedmuffiiim) imt/laiidi n. sp. U. S. N. JI. Iti4924. Type 58 



Imperfect mold of exterior of left valve; lonsitudc 7 mm., < 3. Same locality (4100) as 

 fig. 2. (M. B.) 



Fig. 5. Perteii {Propeainusium) ivai/hindi n. sp. U. S. N. M. 164924. Cotype 58' 



Mold of interior of right valve; altitude 10 ram., X 3. Oligocene-Miocene, Loc. 4115, 

 2i miles west of Gettyshurg, Clallam County, Wash. (M. B. ) 



Fig. 6. Pixli'n (Pseudamnxunn) peckhaini Gabh. Type 56 



Exteriorof left valve; altitude 21 mm. Copied from Pal. Cal., vol. 2, pi. 16, fig. 19. Speci- 

 men from Ojai ranch, Ventura County, Cal. 



Fig. 7. T'lcWn ( PxemldiiiK.ilinii ) pcrklaiiii i Gabb. Cotype 56 



Outline of hinge line and ears of right valve. Copied from Pal. Cal., vol. 2, pi. 16, fig. 19a. 

 Same I'lcality as fig. 6. 



Fig. H. Pirlen {Psi-iul(imuj<iuii() jierklidmi C<a\>]i. K. S. N. M. 164839 56 



Casts of right and left valves in matrix. Monterey shale (Miocene), southeast of Pinole, 

 Contra Costa County, Cal. (M. P. ) 



Fig. 9. Perten {f'hidiiiyx) bravneri n. sp. L. S. J. U. Plastotype 55 



Cast from imperfect moid (type) of left valve; hinge line 33 mm. Vaquero formation 

 ( lower Miocene) , Tuff Hill, near Stanford University, Santa Clara County, Cal. ( M. P. ) 



Fk;. 10. Peiien ( Chlaiiii/s) hrdnni'rl n. sp. L. S. J. T^ 55 



Cast from fragment of mold of disk, showing sculpture. Same locality as fig. 9. (M. P.) 



Fig. 11. Pecten ( Clihitiii/.i ) liniiiiieri n. sp. L. S. J. U 55 



Cast from fragment of mold of disk, showing sculpture. Same locality as fig. 9. (M. P.) 



Fig. 12. Pecten {Peden) nanrtn-cruzetisis n. sp. L. J. F. H. Cotype 54 



Exterior of portion of right valve; longitude 48 mm. San Lorenzo foriuati.in (< )ligocene), 

 Bear Creek, Santa Cruz County, Cal. (M. B. ) 



Fig. 13. Pecten ( Pecten) sanctiecruzensis n. sp. L. S. J . U. Plastoty pe 54 



f'xterior of cast from mold (type) of left valve; altitude 52 mm. San Lorenzo formation 

 (Oligocene), T\vol>ar Creek, Santa Cruz County, Cal. (M. B.) 



150 



