"^^t THE NEW EVOLUTION M' 



All the available facts lead to the conclusion that the major 

 groups of animals appeared simultaneously, or nearly so, in es- 

 sentially the same form as that in which we know them now by 

 a process of concurrent evolution. Furthermore, the animal world, 

 taken as a whole, forms a closely unified entity, and the more we 

 study animals the more clearly do we realize that this is true. 



[z6o] 



