94 EARLY MAN IN BRITAIN. [CHAP. v. 



CHAPTER V. 



BIOLOGICAL AND PHYSICAL CHANGES IN BRITAIN AT 

 THE TIME OF THE ARRIVAL OF MAN. 



Definition of Pleistocene Period. Survivals from Pleiocene Period. 

 Incoming Living Species of Temperate Habit. Incoming Arctic 

 Species. Incoming Species now restricted to Mountains. Incom- 

 ing Species now living in Hot Countries. The Extinct Species. 

 Evidence from Distribution of Mammalia as to Geography of Europe. 

 Evidence as to Climate offered by Mammalia. Climatal and Geogra- 

 phical Changes proved by Glacial Phenomena. Relation of Mammalia 

 to Glacial Phenomena. The Three Divisions of the Pleistocene Age. 

 Pleistocene Mammalia in Britain before, during, and after the Glacial 

 Period. 



WE have arrived now at that stage in the inquiry when 

 new mammals appear, belonging for the most part to 

 living species ; and we shall see in the course of this and 

 the two succeeding chapters, that their remains are 

 associated with human implements in such a manner as 

 to show that man was a member of the fauna which 

 characterises the Pleistocene period of this quarter of 

 the world. 



Definition of the Pleistocene Period. 



The Pleistocene mammalia, found in the deposits of 

 rivers and in ossiferous caverns, present a remarkable 



