ALLEN ON GEOGEAPHICAL DISTRIBUTION OF MAMMALS. 361 



of the Indo- African Kealm, liow strong an affinity exists between the 

 African and Indian Eegions, two-fifths of all the genera of the Indian 

 .Eegion which have an extralimital range occurring also in the African 

 Region. The close affinity of the two provinces of the Indian Eegion 

 is shown by the fact that two-thirds of the peculiar Indian genera found 

 in the Northern or Continental division range also into the Southern or 

 Insular. As will be shown later, the Insular Province is the more 

 highly specialized of the two divisions. 



Genera of the Continental Province. 



Summary. 



Whole aumber , 94 



Restricted to the Indian Region 43 



R stricted (almost wholly) to the province 16 



Other genera ranging over most of the Indian Region and restricted to it 27 



Common to the African R egion •. 28 



Common to portions of the Europsso-Asiatic Region 34 



Ranging over most of the northern hemisphere 17 



Nearly cosmopolite 10 



Restricted to Southern Hindostan and Ceylon 5 



Bull. iv. No. 2 4 



