4?6 



MESOZOIC TIME — REPTILFAN AGE. 



Figs. 765-770. 



Cephalopods.— Figs. 765, 765 a, 765 b, Ammonites Placenta; 766, Scaphites Conradi; 767, S. 

 larvasforniis ; 768,768 a, Baculites ovatus; 769, Section of B. compressus, reduced; 770, 

 Nautilus Dekayi. 



i 



