38 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 tall 
SILVERY GIBBON.—AHylébates Leuciscus. 
canes of the Malaccas, and displays in these congenial habitations the same sportive 
agility that is so peculiar to the Gibbons. 
A very 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 SrimPat itself, is 
extremely long and slender in proportion to the body. The arms of these animals are not 
of that imordinate length which is seen in the limbs of the apes, but are delicate and 
SIMPAI.—Presby‘es Melalophos. 
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 fur- 
nished with small cheek-pouches, 
while others appear to be destitute 
of these natural pockets. The cal- 
losities of the hinder quarters are 
well shown. 
In this group of the Quadrumana, 
the characteristics of the apes disap- 
pear, and the anfmals betray more 
clearly their quadrupedal nature. 
Very seldom do they assume the 
erect attitude, preferrmg to run on 
all 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 
