1911 



YORKSHIRE TYPE AMMONITES 



XL 



Fig. I 



Fig. 2 



Ammonites acuticarinatus, Simpson, 1855 



Wliitl)y Maseum, No. 295, Holotype 

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



ARNIOCERAS ACUTICARINATUM, Simpson sp. 



