MAMMALIAN DAWN. 87 



to peculiar modes of life among the mammals, some surviv- 

 ing, others becoming extinct, the elements of supremacy have 

 remained those of superior structure and intelligence, which 

 in the beginning gave them their advantage over the reptiles, 

 and which have reached their highest expression in man, 

 giving him, in turn, dominion over all the animals of the earth. 



