SIMIADJE. 445 



THE WHITE-CHEEKED GIBBON. 



HYLOBATES LEUCOGENYS. (Hylobates Leucogenys, OGILBY, in Proceed. Zool. Soc. Feb. 1840.) 



SPECIFIC CHARACTERS. Fur full and black ; face black, surrounded by white whiskers, 



and a white beard ; hair of the head erect. 

 LOCALITY. (?) 



DESCRIPTION. Description of a specimen (immature female) in the 

 museum of the Zoological Society, London. Form very slender ; fur 

 thick, deep, and woolly, with a gloss ; the hair on the head is straight, 

 and rises up vertically erect, adding to the apparent height of the cranium, 

 and giving an oval contour to the face, viewed in front ; the general colour 

 is deep black, as is the face, including the chin and ears ; this colour 

 contrasts with a frill-like border of long white hairs, forming whiskers 

 and a beard, encircling the face ; the whiskers consist of long hairs 

 running back from the face, met by others advancing from the neck, 

 and thus standing out in the frill-like manner described ; the hairs on 

 the throat are white, and directed upward to the whiskers ; the palms 

 are black ; the index and second finger of the foot are not united. 

 Height, when erect, about two feet four inches. 



GENERAL HISTORY. The specimen from which the foregoing descrip- 

 tion is taken, was living, for some time, in company with the two Hoolocks 

 previously mentioned, in the gardens of the Zoological Society. It dis- 

 played the same activity and gentleness as its companions, with whom it 

 was perfectly familiar, gamboling with the utmost freedom. Its mode of 

 276 progression was by a series of swinging 



leaps, or, rather, launches, from branch to 

 branch, from which it hung suspended by 

 its arms, except when reposing, or during 

 sleep. No information respecting its habits 

 in a state of freedom has been collected; 

 nor has the precise locality, where it was 

 captured, been ascertained. 



of white-cheeked Gibbon. The annexed figure (276) represents 



the skull of this Gibbon, which is remarkable for its vertical elevation. 



SUB-FAMILY II. Under the term Monkey (a word derived, according 

 to Dr. Johnson, from Monikin, a little Man ; but most probably from the 

 Egyptian term, Monichi), are popularly comprehended all the Simiadae 

 (and, indeed, the Cebidae also,) provided with long tails ; the term, 

 Baboon, being applied to the short-tailed Simiadae, as a distinctive title. 

 The application of a term, sanctioned by long usage, to things having cer- 

 tain characters in common, though always loose, and often leading to erro- 



