106 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



PLATE 7. 



CHICO (UPPER cretaceous) FOSSILS. 



(Unless otherwise stated, all figures are natural size.) 



PAGE 



Pecten (Propcamusium) coiuperi, new species. 63 



Fig. 1. Mould of interior of left valve; alt. 19 mm. 

 Fig. 2. Mould of interior of right valve ; long. 24 mm. 



This species is characteristic of the upper transitional zone of 

 the Chico. Loc. 2, L. S. J. U. Pal. Coll. 



CrassatclUtes conradianus (Gabb). 56 



Fig. 3. Exterior of left valve X?'^; long. 40 mm., alt. 29 mm. 

 Fig. 4. Exterior of right valve X/^; long. 36 mm., alt. 29 mm. Loc. 

 3, L. S. J. U. Pal. Coll. 



Nemodon {Area) breweriana (Gabb). 57 



Fig. 5. Cast of exterior mould of right valve XVs that has been 

 somewhat crushed; long. 32 mm., alt. 14 mm. Upper- 

 most Chico. 



Fig. 6. Exterior of left valve XVs', long. 24 mm., alt. 17 mm. Loc. 2, 

 L. S. J. U. Pal. Coll. 



Inoceramus pembertoni, new species. 61 



Fig. 7. Exterior of right valve X^ ; alt. 217 mm., width 160 mm. 

 Fig. 8. Exterior of left valve X/4. Same dimensions as Fig. 7. 

 Loc. 3, L. S. J. U. Pal. Coll. 



