1909 



YORKSHIRE TYPE AMMONITES 



X 



Fig. I 



Fig. 2 



Ammonites subconcavus, Young & Bird, 1828 



Whitby Museum, No. 214, Holotype— Specimen Figd. PI. XIII, f. 5 



Fig. I, Side view; Fig. 2, Apertural view 



PSEUDOLIOCERAS SUBCONCAVUM, Young & Bird sp. 



