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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.—Incoming 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 Geographical 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
