1910 



YORKSHIRE TYPE AMMONITES 



XIX 



Fig. I 



Fig. 2 





F'g- 3 



Ammonites exortus, Simpson, 1855 



Whitby Museum, No. 645 ; Fig. i, Side view (of Holotype ?) ; Fig. 2, 



Side view of a Paratype ; Fig. 3, Peripheral view of the same 



ECHIOCERAS EXORTUM, Simpson sp. 



