6o6 MANUAL OF ZOOLOGY. 



become gradually produced, whilst the cranium remains in a 

 tolerably stationary condition ; great bony ridges are developed 

 for the attachment of the muscles of the jaws and face ; the 

 incisors project ; and ultimately the muzzle becomes as pro- 

 nounced and well-marked a feature as in the typical Carnivora 

 (fig. 235, A). The Orangs are inhabitants of Sumatra and 

 Borneo. 



The genus Troglodytes contains the Chimpanzee {T. niger) 

 and the Gorilla {T. Gorilla). The Chimpanzee, is a native of 

 Western Africa, and has the arms much shorter, proportionately, 

 than in the Gibbons and Orangs ; still they are much longer 

 than the hind-limbs, and they reach beneath the knee when 

 the animal stands erect. The ears in the Chimpanzee are 

 large, and the body is covered with dark-brown hair. The 

 animal can stand erect, but the natural mode of progression is 

 on all-fours. The hands are naked to the wrist, and the face 

 is also naked, and is much wrinkled. The Chimpanzee lives in 

 society in wooded districts, constructs huts, and can defend 

 itself against even the Elephant. 



The Gorilla is in most respects the same as the Chimpan- 

 zee, but is much larger, attaining a height of fully five feet. 

 The hind-limbs are short, and the ears small. It is an enor- 

 mously strong and ferocious animal, and is found in Lower 

 Guinea and in the interior of equatorial Africa. It possesses, 

 a laryngeal sac, has a most appalling voice, and is polygamous. 

 The Gorilla is now generally regarded as the most human of 

 the Antliropoid Apes. 



CHAPTER LXXXIV. 



BIMANA. 



Order XIV. Bimana. — This, the last remaining order of the 

 Mammalia, comprises Man {Ifomo) alone, and it will therefore 

 require but little notice here, the peculiarities of Man's mental 

 and physical structure properly belonging to other branches of 

 science. 



Zoologically, Man is distinguished from all other Mammals 

 by his habitually erect posture and bipedal progression. The 

 lower limbs are exclusively devoted to progression and to sup- 

 porting the weight of the body. The anterior limbs are shorter 

 than the posterior, and have nothing whatever to do with pro- 



