1909 



YORKSHIRE TYPE AMMONITES 



IVa 



Fig. I 



Fig. 2 



Ammonites mulgravius, Young & Bird, 1822 



Whitby Museum, No. 205, Holotype— Specimen figd. PI. XIII, f. 8 



Fig. I, Side view; Fig. 2, Apertural view; both x 0.5 



HARPOCERAS MULGRAVIUM, Young & Bird sp. 



