316 



TABLE OP DISTRIBUTION. 



mean all the Pliocene and Pleistocene strata^ i.e. all the 

 beds from the Coralline Crag inclusive up to the Alluvial 

 and Peat deposits. This division is convenient, as the 

 tertiary strata of the Isle of Wight end with upper Eocene, 

 or possibly lowermost Miocene, whilst in the London 

 district there are no traces of Miocene, and even the 

 upper Eocene is wanting; the gap, therefore, between 

 what may be called the Lower Tertiaries and the Upper 

 Tertiaries in this country is very considerable and well 

 naarked.^' 



Table showing the species of Land and Freshwater ^lol- 

 lusca which have been described in the foregoing part 

 of this volume — their foreign range — and the occur- 

 rence of any of them as Upper Tertiary fossils. This 

 mark ( — ) signifies their occurrence in the district 

 indicated by the column. 



