66 RELATIONS TO OTHER BRITISH DEPOSITS. 



bratula sella and Vermicularia Phillipsii. So that it is evident that 

 if our Upware beds have any representative at Speeton it must 

 be somewhere in the Upper Neocomian Clays of Prof. Judd. 

 Such I believe may well be the case, for although the fossils are 

 not nearly so similar as those in the Godalming district of the 

 South of England, we must remember that the physical condi- 

 tions at the time were very different in the two places, Speeton 

 being deep sea whilst Cambridgeshire was shallow water or dry 

 land; and if the Upper Neocomian earth-subsidence was at all 

 uniform over the East of England, the Speeton waters were at their 

 deepest while the Upware beds were being laid down further south. 

 "What in England is called Lower Greensand is partly a littoral 

 deposit (Potton, Farringdon, Hunstanton), and may readily be 

 admitted to have its pelagic equivalent in some part of the Speeton 

 Clay where Exogyra sinuata occurs V 



1 Phillips, Geology of Yorkshire, 2nd edition, page 99. 



