1914 



YORKSHIRE TYPE AMMONITES— II 



XCV 



Fig. i 



Fig. 2 



Ammonite? socialis, Simpson, 1855 



Whitby Museum, No. 68, Holotype 



Fig. 1, Side view ; Fig. 2, Peripheral view ; botli x 0.95 



DEROCERAS SOCIALE. Simpson sp. 



