ORIGIN OF OUR HANDS AND BACKBONE 553 



wear on a cold day. Further examination of the fowl 

 will also show you that the succulent second joint cor- 

 responds with your own thigh and hip, that the drum- 

 stick is the calf and shin, and that the scaly part, which 

 you call the leg of a chicken or bird, corresponds with 

 the foot of a human being. Birds walk on their toes 

 with their heels in the air, as do horses, cows, dogs, and 



Man and Ape with Wings. Man and Bird's Legs Compared 



other beasts, with the exception of coons and bears; 

 the latter walk on the palms of their hands and soles of 

 their feet, and are called plantigrade animals. It is in- 

 teresting to know that the naked babies of some savage 

 tribes walk in the same manner, and do not creep on 

 their hands and knees like children of civilized parents. 

 We have seen that a bird's wings are its arms, cor- 

 responding in every essential particular with the arms of 



