1918 YORKSHIRE TYPE AMMONITES— II CXVIa 



Fig. 2 Fig. i Fig. 3 



Ammonites vertumnus, Bean-Leckenby, 1859 



Sedgwick Museum, Cambridge (Leckenby Coll.), Holotype — PI. 1, f. 3 



Fig. 1, Side view ; Fig. 2, Apertural view ; Fig. 3, Peripheral view 



VERTUMNICERAS VERTUMNUS, Bean-Leckenby sp. 



