2O2 HISTORY OF THE EUROPEAN FAUNA. 



Canis lagopus. * Mus minutus. 



Gulo luscus. * Arvicola agrestis. 



* Mustela erminea. * amphibius. 



* putorius. arvalis. 



* vulgaris. * glareolus. 



* Sorex vulgaris. gregalis. 

 Lagomys pusillus. ratticeps. 



* Castor fiber. Equus caballus. 

 Spermophilus Eversmanni. Saiga tartarica. 



erythrogenoides. Ovibos moschatus. 



Cricetus songarus. Alces latifrons. 



Myodes lemmus. ,, machlis. 



Cuniculus torquatus. Rangifer tarandus. 



* Those marked with an asterisk still inhabit Great Britain, or did so 

 within historic times. 



Of the arrival of many of these in Europe we have 

 geological proof, as they have left their bones in 

 recent pleistocene deposits, and are unknown from 

 older European strata. The remote ancestors of 

 others, such as Sorex and Lagomys, no doubt lived in 

 Europe, but the recent species probably had their 

 original homes in Asia. It is evident that in recent 

 geological times there existed no active centre of 

 origin for mammals in Europe, and that our continent 

 was largely dependent on the neighbouring one for 

 the supply of its mammalian fauna. A shifting of the 

 centre of development from Europe to Asia appears 

 to have taken place occasionally, as already men- 

 tioned (p. 45). Mr. Lydekker has drawn attention 

 to the fact that though the remote ancestors of the 

 Elephantidcz resided in Europe, neither the latter 



