CHAP. XVII.] 



MAMMALIA. 



171 



We have to pass over more than 70 of longitude before we again 

 meet with Anthropoid Apes, in the northern part of Sumatra 

 where a specimen of the orang-utan (Simia satyrus) now in the 

 Calcutta Museum, was obtained by Dr. Abel, and described by 

 him in the Asiatic Researches, vol. xv. and in Borneo, from which 

 latter island almost all the specimens in European museums have 

 been derived. There are supposed to be two species of Simia in 

 Borneo, a larger and a smaller ; but their distinctness is not ad- 

 mitted by all naturalists. Both appear to be confined to the 

 swampy forests near the north, west, and south coasts. 



The Gibbons, or long-armed apes, forming the genus Hylobates, 

 (7 species) are found in all the large islands of the Indo-Malayan 

 sub-region, except the Philippines ; and also in Sylhet and Assam 

 south of the Brahmaputra river, eastward to Cambodja and 

 South China to the west of Canton, and in the island of Hainan. 



The Siamang (Siamanga syndactyla] presents some anatomi- 

 cal peculiarities, and has the second and third toes united to the 

 last joint, but in general form and structure it does not differ 

 from Hyldbates. It is the largest of the long-armed apes, and in- 

 habits Sumatra and the Malay peninsula. 



FAMILY 2. SEMNOPITHECID.E. (2 Genera, |p Species.) 

 GENERAL DISTRIBUTION. 



The Semnopithecida^ are long-tailed monkeys without cheek- 

 pouches, and with rather rounded faces, the muzzle not being 

 prominent. They have nearly the same distribution as the last 

 family, but are more widely dispersed in both Africa and Asia, 

 one species just entering the Palaearetic region. 



The Eastern ;enus Prestytes or Semnopithecus (29 species), is 

 spread over almost the whole of the Oriental region wherever the 

 forests are extensive. They extend along the Himalayas to beyond 

 Simla, where a species has been observed at an altitude of 11,000 



