126 ALLEN’S NATURALIST’S LIBRARY. 
laughing noise made by others, during which the corners of the 
mouth are drawn backward and the eyelids wrinkled. In Man 
the nose is much more prominent than in most Monkeys; but 
we may trace the commencement of an aquiline curvature in 
the nose of the Hoolock Gibbon, and this in the Great-nosed 
Monkey (WasaZis /arvatus) is carried to a ridiculous extreme.” 
In regard to the distribution of the Axthropordea, excluding 
Man (//ominide), two families (the Hapalide and Cebide) 
are known only from the New World; and two others (the 
Cercopithecida and Simitde) are exclusively confined to the 
Old World. No fossil remains of Eastern Hemisphere forms 
have as yet been found in the Western, or wice versi, a fact 
which indicates, doubtless, a separation of great antiquity be- 
tween the two groups. The various species of these families 
are to be found chiefly in the warmer regions on both sides of 
the equator. In the New World some species range as far 
north as to 20° N. lat. in Mexico; and South, to 30° below 
the equator. In the Eastern Hemisphere, the Old World species 
predominate in the tropical and sub-tropical regions ; but  cer- 
tain forms have spread as far north as Thibet and Japan, and 
others have made the high altitudes of the Himalaya Moun- 
tains their home; while to the southward they extend in 
Africa nearly to the Cape of Good Hope. No indigenous 
species have ever been found in New Guinea, Australia, New 
Zealand, or in the Pacific, or West Indian Islands. 
The Apes of the Old World differ in many important charac- 
ters from those of the New. Among the former, as already 
mentioned, the openings of the nostrils are directed down- 
wards, as in Man; the nose is narrow, and the nostrils them- 
selves are set close together, being separated from each other 
by a thin septum, or partition, of cartilage. On this account, 
its, Cae ae 
a 
