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 (JVasalis larvatus] is carried to a ridiculous extreme." 



In regard to the distribution of the Anthropoidea, excluding 

 Man (Hominida), two families (the Hapalida and Cebidce) 

 are known only from the New World ; and two others (the 

 Cercopithecida and Simiidce) are exclusively confined to the 

 Old World. No fossil remains of Eastern Hemisphere forms 

 have as yet been found in the Western, or vice versa, 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 



