214 GENERAL EVOLUTION. 



tions of mimetic analogy in any other way, the supposition of 

 Wallace that such forms must be spontaneously produced, and 

 then preserved by natural selection, being no explanation. It has 

 been shown by Bennett that the chances of such modification aris- 

 ing out of the many possibilities are exceedingly small. 



If the above positions be true, we have here also the theory of 

 the development of intelligence and of other metaphysical traits. 

 In accordance with it, each trait appropriates from the material 

 world the means of perpetuating its exhibitions by constructing its 

 instruments. These react by furnishing increased means of exer- 

 cise of these qualities, which have thus grown to their full expres- 

 sion in man. 



