352 MENTAL EVOLUTION IN ANIMALS. 



Next we arrive at Monkeys and the Elephant, which, with 

 the exception of the Anthropoid Apes, are the only animals 

 that, so far as I have been able to ascertain, make use of 

 tools.* 



Lastly on level 28 we arrive at the highest development 

 of the psychical powers which are to be met with in existing 

 animals, and to this level I have assigned the Anthropoid 

 Apes and Dogs. The meaning of the term " Indefinite 

 Morality," which I give as distinctive of this grade of 

 mental evolution, I shall explain in my next work, when I 

 shall have to discuss the question touching the probable 

 genesis of the moral sense. It is, I think, undesirable to 

 divide this discussion, and therefore I prefer to postpone the 

 consideration of this which I take to be the earliest phase in 

 the development of the faculty of Conscience. And for the 

 same reason I shall postpone my analysis of the lower stages 

 of Abstraction and Volition, both of which are crossed by 

 the level which we have now reached, where our enquiry 

 into the Mental Evolution of Animals comes to an end. 



* Animal Intelligence, pp. 408-9 and 480-94. 



THE END 



