1540 THE STORY OF THE UNIVERSE 



recent period, the domestic cattle of Europe have 

 been introduced into the Australian continent, and 

 have multiplied there to an extraordinary degree. Ef- 

 forts are now making to introduce into Australia 

 both the camel of the Old World and the llama of 

 South America. The hare and the rabbit of Britain 

 have become naturalized in the more southwardly of 

 the Australian colonies. Similar efforts are at the 

 present time directed to the naturalization in the 

 Australian rivers of the salmon and other fish that 

 belong to the streams and estuaries of Europe. What 

 has been accomplished, in these and many similar 

 cases, by the direct efforts of man, has resulted, in 

 the case of many of the smaller animals, from his 

 involuntary agency, or from accidental causes. The 

 vessel which conveys a cargo of native produce from 

 one region to a foreign shore has often carried with 

 it the germs of life (vegetable as well as animal), 

 besides, in numerous instances, the smaller members 

 themselves of the animal world. The insects that 

 were originally confined to one region have thus be- 

 come distributed over wide areas of the globe. 



A few other of the more obvious differences be- 

 tween the native zoology of the Old and New Worlds 

 may be adverted to with advantage. Among carniv- 

 orous quadrupeds, the lion, tiger, leopard, panther, 

 and hyena are confined to the eastern half of the 

 globe. In the New World, the puma and the jaguar 

 take respectively the places of the lion and tiger 

 of the Asiatic continent. Of the ruminants, the 

 camel, the giraffe, and the numerous antelopes are 

 only found within the Old World. Of the pachyder- 



