INSTINCT AND HABIT. 149 



the dog among civilised nations, and no re- 

 port that savages or semi-savages have ever 

 domesticated the allied wild species around 

 them. 



Sir Harry Johnston, in his ' Uganda,' ex- 

 presses his surprise that the most intelligent 

 negro tribes seem never to have thought of 

 domesticating any wild animals until the 

 advent of Europeans. 



The Australian aborigines, instead of try- 

 ing to domesticate the dingo their wild dog 

 eat him. 



There is undoubtedly all over the world a 

 general similarity in physique between do- 

 mestic dogs and their wild allies in the same 

 locality, and this at first sight seems to sup- 

 port the hypothesis that domestic dogs are 

 descended from allied wild species ; but 

 according to our theory, the wild dog was 

 not the ancestor but the antecessor of the 

 domestic dog, and the last step in his evolu- 

 tion was more a modification in character, 

 disposition, and habits than in physical type. 

 These differences in character are so great, 

 and in some respects so antagonistic, that 

 they separate the domestic dog from allied 

 wild species as certainly as specific variations 

 in physical type. 



