55$ MANUAL OF ZOOLOGY. 



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 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. The Gorilla 

 is now generally regarded as the most human of the Anthro- 

 poid Apes. 



CHAPTER LXXXIV. 

 BIMANA. 



ORDER XIV. BIMANA. This, the last remaining order of the 

 Mammalia, comprises Man (Homo} 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- 

 gression. The thumb is opposable, and the hands are pre- 

 hensile, the fingers being provided with nails. The toes of the 

 hind-limb are also furnished with nails, but the hallux is not 

 opposable to the other digits, and the feet are therefore useless 

 as organs of prehension. The foot is broad and plantigrade, 

 and the whole sole is applied to the ground in walking. 



The dentition consists of thirty-two teeth, and these form a 

 nearly even and uninterrupted series, without any interval or 

 diastema. The dental formula is 



i?=2.; c t 1 ; Am 2 ; m*^3 = 32. 

 22 i i ' 22 33 J 



The brain is more largely developed and more abundantly 



