1912 



YORKSHIRE TYPE AMMONITES 



Fig. I 



Fig. 2 



Fig. I a 



Ammonites siphuncularis, Simpson, 1843 

 ,. Whitby Museum, No. 485 



Fig. I, Side view ; Fig. la, Peripheral view, of Holotype ; Fig. 2, Peripheral 

 view of Heautotype : all x 2 



ANDROGYNOCERAS SIPHUNCULARE, Simpson sp. 



