376 ISLAND LIFE part ii 



the adjacent islands, and the series of geographical changes 

 that seem required to explain them. 



Zoological Features of Borneo. 



Mammalia. — Nearly a hundred and forty species of 

 mammalia have been discovered in Borneo, and of these 

 more than three-fourths are identical with those of the 

 surrounding countries, and more than one half with those 

 of the continent. Among these are two lemurs, nine 

 civets, five cats, five deer, the tapir, the elephant, the 

 rhinoceros, and many squirrels, an assemblage which could 

 certainly only have reached the country by land. The 

 following species of mammalia are supposed to be peculiar 

 to Borneo : — 



Of the twenty-nine peculiar species here enumerated 

 it is possible tliat a few may be found to be identical with 

 those of Malacca or Sumatra; but there are also four 

 peculiar genera which are less likely to be discovered 

 elsewhere. These are Nasalis, the remarkable long-nosed 

 monkey ; Rheithrosciurus, a peculiar form of squirrel ; and 

 Trichys, a tailless porcupine. These peculiar forms do not, 

 however, imply that the separation of the island from the con- 

 tinent is of very ancient date, for the country is so vast and 



