1918 



YORKSHIRE 1 YPE AMMONITES— II 



(XV 



Fig. 2 



Fig. 



Ammonites rugosus, Leckenby, 1859 



Sedgwick Museum, Cambridge (Leckenby Coll.), Holotype 



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



PACHYCERAS RUGOSUM, Leckenby sp. 



