146 



THE GEOGRAPHY OF MAMMALS 



the other Sub-regions. It will be seen that, while the total 

 number of genera has not increased very much, the 

 number of endemic genera is nearly doubled, as compared 

 with those of the other two Sub-regions. 



Section VII. — The Celebesian Sub-region 



As already mentioned, the island of Celebes presents 

 a problem of considerable interest to the student of 

 geographical distribution. Celebes is separated from the 

 other islands, both to the eastward and to the westward, 

 by seas of considerable depth. Compared with the other 

 Malayan islands, its fauna is scanty. This fact, and the 

 very peculiar shape of the island, suggest a possibility of 

 its having been formerly of greater extent, and of having 

 been subsequently reduced by subsidence. 



We will first review the mammal-fauna, and then try 

 and deduce, from a study of it, our conclusions as to its 

 past history. 



In Celebes alone of the Oriental Region we find repre- 



