1 84 THE EVOLUTIONIST AT LARGE. 



of correlated nerve-connections answering to 

 this universal habit of his race ; and the 

 group in question would be quite without any 

 analogous mechanism in the brain of the 

 ancestral wolf. As truly as the wing of the 

 bird is adapted to its congenital instinct of 

 flying, as truly as the nervous system of the 

 bee is adapted to its congenital instinct of 

 honeycomb building, just so truly is the brain 

 of the dog adapted to its now congenital 

 instinct of following and obeying a master. 

 The habit of attaching itself to a particular 

 human being is nowadays engrained in the 

 nerves of the modern dog just as really, 

 though not quite so deeply, as the habit of 

 running or biting is engrained in its bones 

 and muscles. Every dog is born into the 

 world with a certain inherited structure of 

 limbs, sense-organs, and brain : and this in- 

 herited structure governs all its future actions, 

 both bodily and mental. It seeks a master 

 because it is endowed with master-seeking 

 brain organs ; it is dissatisfied until it finds 



