THE PAL^EARCTIC REGION 



179 



in number, are mostly widely spread. When these figures 

 have been reduced to percentages, it will be found that only 

 24 per cent, of the genera are endemic, which is considerably 

 less than in any other of the Regions hitherto treated of. 

 Reviewing the Fauna in detail, we find that of the nine 



Fig. 35. — The Bacteian Camel. 

 (Camelus bactrianus.) 



terrestrial Orders, six only are represented in the Palsearctic 

 Region, the Edentates, Marsupials, and Monotremes being 

 completely absent. Among the Ungulates, of which a 

 considerable number of forms are found within the 

 Palsearctic sphere, there is a fair percentage of peculiarities. 

 The Bactrian, or Two-humped camel (Fig. 35), is known to 



