1912 



YORKSHIRE TYPE AMMONITES 



XLIX 



Fig. I 



Fig- 3 



Fig. 2 



Fig- 4 



Ammonites cereus, Simpson, 1855 



Whitby Museum, No. 461, Holotype 



tig. I, Side view; Fig. 2, Apertural view; Fig. 3, Peripheral view: all 



nat. size ; Fig. 4, Suture-line (approximate), x 4 



ECHIOCERAS CEREUM, Simpson sp. 



