1911 



YORKSHIRE TYPE AMMONITES 



XXXII 



Fig. I 



Fig. 2 



Fig- 3 



Ammonites cornutus, Simpson, 1843 



Whitby Museum, No. 185, Holotype 



Fig. I, Side view ; Fig. 2, Apertural view ; Fig. 3, Peripheral view 



PHRICODOCERAS CORNUTUM, Simpson sp. 



