PLATE X. 



PAGE 



Tig. 4. AMMONITES SUBTRICARINATUS. 60 



Natural size. 

 4 a. End view of the fragment. 



Fig. 5. A. NEWBERRYANUS. 61 



Natural size. Mount Diablo. 



Pig. 6. A. NEWBERRYANUS. 61 



Natural size. Cottonwood Creek 

 6 a. Front view. 

 6 b. Septum. 



Pig. 7. A. BREWERII. 62 



-f Natural size. 



Fig. 8, 8 a. A. HAYDENII. 62 



f Natural size. 

 8 b. Septum. 



Fig. 9. A. PERUVIAKUS? 63 



Natural size 



