1913 YORKSHIRE TYPE AMMONITES-II LXXVI 



Fig. 2 



Fig. i 



F'g 3 



Ammonites defossus, Bean-Simpson, 1843 



Whitby Museum, No. 103, Holotype 



Fig. 1, Side view ; Fig. 2, Peripheral view ; Fig. 3, Suture-line, x 4 



DEFOSSICERAS DEFOSSUM, Bean-Simpson sp. 



