162 THE STORY OF ANIMAL LIFE 



of ordinary quadrupeds. Thus Notoryctes, a form 

 discovered a few years ago, mimics a mole. The 

 fact is that, just as among the Eutheria, or higher 



FlO. 45. Skull and Lower Jaw of Great Kangaroo, Macroput 

 giganteus, much reduced. 



mammals, special types have become established, 

 possessed of certain habits, and especially of cer- 

 tain habits with regard to food, and modified in 

 accordance with those habits. Thus there are 

 among them savage carnivora, harmless herbiv- 

 ora, and rodents; and these respectively share 



