THE TROPICAL FOREST 107 



antelopes have become modified for forest life. This is 

 especially true of the little duikerboks (Cephalophus), 

 whose slender bodies enable them to glide through the 

 undergrowth. The African harnessed antelopes (Trage- 

 laphus) also, and the African sable antelopes (Hippo- 

 tragus) are found in wooded country. In the African 

 tropical forest also is found the rare and little-known 

 okapi, a relative of the giraffe, but with stripes recall- 

 ing those of a zebra (Fig. 46). 



In tropical Asia the sambar and its alUes are the chief 

 deer of forests, but the muntjacs (Cervulus) also haunt 

 wooded country, choosing upland regions. In the 

 dense jungles of South-East Asia occur various members 

 of the genus Tragulus, including small, almost rodent- 

 like animals, of primitive structure, called chevrotains. 

 They are the smallest of living ungulates, being only 

 about a foot in height, and their slender legs and bodies 

 enable them to glide through the jungle, and thus to 

 persist despite their generalized structure. An allied 

 form, the water ehevrotain, occurs on the west coast 

 of Africa, where it inhabits swampy regions. 



In a densely forested region, rivers or swamps, with 

 their special types of vegetation, obviously afford 

 advantages to animals not fitted for arboreal life 

 proper. We find, therefore, that such parts of the forest 

 have special animals. The wild pigs of India and the 

 adjacent regions, the bush pigs of Africa, are examples 

 of forms which haunt the damper parts of forests. 

 Africa has also its hideous wart-hogs (Phacochoerus) 

 while the islands of Celebes and Buru lodge in their 

 forest the curious babirusa with its enormously elon- 

 gated tusks. America has no true pigs, but the slender- 

 limbed peccaries replace them, and are similarly 

 inhabitants of the swampy parts of forests. All these 



