1918 



YORKSHIRE TYPE AMM0MTES—I1 



CXIb 



Fig 2 



Fig. i 



Ammonites ovatus, Young & Bird, 1828 



Whitby Museum, No. 198, Heautotype 



Fig. 1, Side view ; Fig. 2, Peripheral view : both x 0.63 



OVATICERAS PSEUDOVATUM, S. Buckman sp., 1910 



