1918 



YORKSHIRE TYPE AMMONITES— II CXVIb 



Fig. 2 



Fig. i 



Ammonites vertumnus, Bean-Leckenry, 1859 



Sedgwick Museum, Cambridge (Leckenby Coll.), Paratype 



Fig. 1, Side view ; Fig. 2, Peripheral view 



VERTUMNICERAS DAMONI, Nikitin sp. 



