2O6 HISTORY OF THE EUROPEAN FAUNA. 



In spite of this unusual precaution, the species has 

 not survived to add another member to the resident 

 British fauna. The wave of migration from the east 

 has come and vanished again just like so many others 

 with which history is familiar. 



These migrations from the east occurring at the 

 present day give us some idea of those of which we 

 have fossil evidence, and which all had their origin 

 in Central and Northern Asia. Almost all the species 

 of mammals to which I have referred as being of 

 Siberian origin have been found in the fossil state 

 in comparatively recent geological deposits within a 

 certain very limited area. None of the typical species 

 have ever been found in Southern Europe proper, 

 including the Mediterranean islands. It must be 

 remembered that though the Reindeer is a Siberian 

 migrant, the form of the Reindeer which was found 

 in the Pyrenees belonged to a distinct variety in 

 fact, to a much earlier migration which issued from 

 the Arctic European Regions, and to which I have 

 referred in detail (pp. 150-158). Curiously enough, 

 no deposits of these typical Siberian mammals 

 have ever been obtained in Scandinavia only in 

 Russia, Austria, Switzerland (the lowlands), Germany, 

 Belgium, France, and England. To facilitate a study 

 of the extent of these migrations, I have constructed 

 a map on which the probable course taken across 

 Central Europe is roughly indicated by dots 

 (Fig. 16). 



In the migrations of to-day we perceive the same 



