﻿Quart. Journ. Geol. Soc. Vol. LXI, Pl. XVI. 



m,^ 



^i^u 



Fig. 3. 



ALOCOLYTOCERAS TVENIATUM and PACHYLYTOCERAS 

 PHYLLOCERATOIDES. 



?• W. Tutcher, Photo. 



Be tit rose, Collo. 



