PLATE X. 



Pig. 4. Ammonites subtkicarinatus. 



Natural size. 

 4 a. End view of the fragment. 



PACK 



60 



Fig. 5. 



Fig. 6. 



A. Newberryanus. 

 Natural size. Mount Diablo. 



A. Newberkyanus. 

 Natural size. Cottonwood Creek 



6 a. Front view. 

 6 /*. Septum. 



Fig. 7. 



Fig. 8, 8 a. 



8 b. Septum. 

 Fig. 9. 



A. Breaverii. 

 | Natural size. 



A. Haydenii. 

 § Natural size. 



A. Peruvianus ? 

 Nnturnl size 



61 



01 



62 



62 



68 



