1911 



YORKSHIRE TYPE AMMONITES 



XLITT 



Fig. I 



Fig. 2 



F'g- 3 



Ammonites lectus, Simpson, 1843 



Whitby Mu.seum, No. 238, Holotype 



Fig. I, Side view ; Fig. 2, Peripheral view ; Fig. 3, Suture 



line (x 4) approximate 



PSEUDOLIOCERAS LECTUM, Simpson sp. 



