1909 



YORKSHIRE TYPE AMMONITES 



IVb 



Fig. I 



Ammonites mulgravius, Young & Bird, 1822 



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



Fig. I, Side view (portion), nat. size. Diameter is 235 mm. 



HARPOCERAS MULGRAVIUM, Young & Bird sp. 



