GIBBONS. 59 



teeth, wliich project far beyond the level of the other teeth. The long and narrow 

 liands and feet of these animals (shown in Figs. 11-13 of the illustration on p. 15) 

 are characterised by the great extent to which the thumb and great toe are 

 respectively separated from the other fingers and toes, as well as by the flatness 

 of all the nails. In colour, the gibbons vary from black to yellowish-white ; this 

 variation occurring even in difierent individuals of the same species. The com- 

 paratively well-formed nose, as seen in our figure of the white-handed gibbon, 

 imparts to their physiognomy an expression far less repulsive and forbidding 

 than tliat which characterises the larger Man-like Apes. 



In disposition the gibbons are gentle and confidinsr: and wlien 

 Disposition. , ^ , " , ,. ° , rr,, • • 



captured young they can be readily tamed. Their constitution is, 



liowever, even more delicate than that of the other Man-like Apes ; and consumption 

 soon terminates their existence in Europe, even when the greatest care and atten- 

 tion are bestowed upon them. In the Zoological Gardens at Calcutta, gibbons 

 tlirive excellently; and one, kept there some twelve years ago, was accustomed to 

 make his presence known to people living more than a mile away by the loudness 

 of his morning and evening cries. 



All the fjibbons are thorou"lily arboreal in their habits; and in 

 Habits. ... r^ J ' 



the rapidity of their movements among the trees they offer a marked 



contrast to the more deliberate and somewhat sluggish motions of the orang. So 



rapid and lightning-like are these movements that one species — the hoolock 



— lias been observed, when in captivity at Calcutta, to catch bii-ds on the 



wing tliat had flown into its cage ; and there can be but little doubt that 



such habits are natural to these animals in their wild condition, when it is pi'obable 



that birds thus captured constitute an appreciable portion of their food. 



Although several of the species are found in the forests of the plains, the 

 hoolock appears to be almo.st if not exclusively restricted to those of hilly districts. 

 In marked contrast to the lai-ger Man-like Apes, most of the gibbons go in large 

 flocks or droves, whicli may comprise from fifty to a hundred, or even more 

 individuals ; although, as \\\{\\ most gregarious animals, solitary males ai-e 

 occasionally obser\'ed. The long arms are the chief agents in their active 

 movements among the trees : and bj' their aid the distances they can swing 

 from bough to bough, and tlius from tree to tree, are of surprising length. 

 When going down-hill they travel at an extremely i-apid pace, by swinging 

 themselves in a downward direction from one bough till they catch another on a 

 lower level, and so from that to the next one. 



Altliough walking rapidly when on the ground, gibbons, as Mr. W. T. Blanford 

 tells us, can easily be overtaken bj^ men. The same writer observes that, " when 

 walking on the ground, the hoolock rests on its hind-feet alone, with the sole flat on 

 the ground, and the great toe widely separated from the other digits. The arms 

 are usually held upwards, sometimes horizontally, their great length (as shown in 

 our illustration on p. 58) giving the animal a very peculiar aspect." 



We have already mentioned the fondness of the hoolock .for small birds, and, 

 in addition to this kind of diet, gibbons subsist mainly on various fruits and leaves, 

 as well as young and tender shoots ; they also feed on insects and spiders, and the 

 eggs and callow nestlings of birds. 



