THE SILVERY GIBBON. 



little different from that of Gibbons generally, the adult animal measuring about three 

 feet or so in height. Active, as are all its relatives, it lives among the branches and 



SILVERY GIBBON. Hylobates Leuciscus. 



tall canes of the Malaccas, and displays in these congenial habitations the same sport- 

 ive agility that is so peculiar to the Gibbons. 



A vefy different group of animals now comes before us, separated even by the outer 

 form from the apes. 



The chief distinction which strikes the eye, is the presence of a tail, which is of some 

 length, and in several species, among which we may mention the SIMPAI itself, is 

 extremely long and slender in proportion to the body. The arms of these animals are 

 not of that inordinate length which is seen in the limbs of the apes, but are delicate and 



well proportioned. The hinder 

 paws, or hands, are extremely 

 slender, their thumbs being 

 short, and, as will be seen by 

 reference to the engraving, are 

 twice the length of the fore- 

 paws. 



Some of these monkeys are 

 furnished with small cheek- 

 pouches, while others appear to 

 be destitute of these natural 

 pockets. The callosities of the 

 hinder quarters are well shown. 

 In this group of the Quad- 

 rumana, the characteristics of 

 the apes disappear, and the 

 animals betray more clearly 

 their quadrupedal nature. Very 

 seldom do they assume the erect 

 attitude, preferring to run on all 

 SIMPAI. Presbytes Meiaiophos. fours like a dog, that being their 



legitimate mode of progression. 



Even when they do stand on their hind feet, the long tail at once deprives them of that 

 grotesque semblance of the human form, which is so painfully exhibited in the tail-less 



