1914 



YORKSHIRE TYPE AMMONITES— II 



CIIb 



Fig. i 



Fig. 2 



Ammonites hastatus, Young & Bird, 1828, Simpson, 1855 



Whitby Museum, No. 661, Holotype ? 



Figs. 1, 2, Apertural views, x 0.75 



DEROCERAS HASTATUM, Young & Bird sp. 



