MONKEYS. 



441 



The Gibbons (Hylobates)* have callosities on the hinder parts of their 

 bodies, but have neither a tail nor cheek-pouches. They are found in the re- 

 motest parts of the continent of India and the adjacent islands, where they 

 inhabit dense and impenetrable forests. 



The Siamang 1 (Simia-\- syndactyla^) differs from the other gibbons in having the 

 second and third toes of the hinder limb partially joined together by a narrow fold of 

 skin. These apes live together in numerous bands. During the day they remain silent, 

 concealed among the foliage of the trees, but in the early morning and evening they 

 make the woods to resound with their discordant and frightful cries. They seem to 

 live under the guidance of active and vigilant chiefs. All take alarm at the sl'ghtest 

 sound that they do not understand, and escape into the recesses of the forest. 



FIG. 486. BORNEAX ORAXG. 



The OrangS (Troglodytes) are the only Ouadrumana of the Old World 

 which have no callosities on their hinder parts, nor cheek-pouches, nor any 

 vestiges of a tail. Their arms are of inordinate length and strength, while the 



* V\TJ, ule, a wood or forest ; fiaivu, baino, to go or traverse. 



t ffifjAs, simos, flat-nosed. 



% atv, syn, together with ; od/cri-Xos, dactylos, a finger or toe: having conjoined toes. 



