1913 YORKSHIRE TYPE AMMONITES— II LXXVII 



Fig. i 



Fig. 2 



Ammonites regularis, Simpson, 1855 



Clarkson Coll., Holotype 



Fig. 1, Side view, x 1.1 ; Fig. 2, Peripheral view 



PALTOPLEUROCERAS REGULARE, Simpson sp. 



