1918 



YORKSHIRE TYPE AMMONITES— II CXVIIa 



F»g-3 





Ammonites gregarius, Bean-Leckenby, 1859 



Sedgwick Museum, Cambridge (Leckenby Coll.), Lectotype ; GenoholoU pe 



Fig. 1, Side view ; Fig. 2, Peripheral view ; Fig. 3, Suture-line x 3 



PRORSICERAS GREGARIUM, Bean-Leckenby sp. 



