PLATE XXII. 



PAOE 



Fig. 12. AMMONITES JUGALIS, from the Martinez Group at Benicia. IBS 



Ty fat \ 12 a. Cross section of body whorl. 



12 b. Septum from same specimen. 



Fig. 13 UVH Sf 9 - A specimen of ; 4b oamc from Martinez 



13 a. Front view of same. 



Fig. 14. A. WHITNBTII. 134 



14 a. Front view of the same. 

 14 b. Septum of the same. 



