TIIK CRETACEOUS SYSTKM 

 



467 



v" 



Fig. 158. FOSSILS OK THK WKALDEN BEDS. 



A. Onychiopsis Mantelli. B. Unio valdensis. 



Fig. 154. GROUP OF FOSSILS FROM THE 8PEETON CLAY 



(Hauterivian and Barreinian). 



a. Pecten cinctus. : Oites regalis. 



b. Hoplites speetonensis. d. Crioceras Duvali. 



