THE SIMPAI. 9 
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 Quadrumana, the characteristics of the apes disap- 
pear, and the animals betray more clearly their quadrupedal nature. Very 
seldom do they assume the erect attitude, preferring 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 
THE SIMPAI.—(Presbytes melalophos.) 
apes. Besides these external distinctions, there are many remarkable peculiari- 
ties in the anatomy of the internal organs, which also serve to settle the 
position of the animal in the order of nature. Among these internal organs, 
the stomach displays the most remarkable construction, being very large, and 
divided into compartments that bear some resemblance to those in the 
stomach of ruminating animals. 
These monkeys are distributed through several parts of the world, the 
Simpai making its residence in Sumatra. 
This is a beautiful little animal, and is pleasing both for elegance of shape 
and the contrasting tints with which its fur is decorated. The prevailing 
colour of the body is a light-chestnut, with a perceptible golden tinge showing 
itself when the light falls obliquely on the fur. The inside of the limbs and 
the abdomen are not so bright as the rest of the body, but take a most sober 
tint of grey. At the top of the head the hair is straight, and is set on nearly 
perpendicularly, so as to form a narrow crest, The colour of the crest, 
