1912 



YORKSHIRE TYPE AMMONITES 



LXII 



Fig. I 



Fig 



Ammonites crassiusculosus, Simpson, 1855 



Whitby Museum, No. 137, Holotype 

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



DACTYLIOCERAS CRASSIUSCULOSUM, Simpson sp. 



