THE UNKNOWN WORLD. 193 



beasts in glass cases, to arrange insects in cabinets, 

 and dried plants in drawers, is merely the drudgery 

 and preliminary of study ; to watch their habits, to 

 understand their relations to one another, to study 

 their instincts and intelligence, to ascertain their 

 adaptations and their relations to the forces of nature, 

 to realize what the world appears to them ; these 

 constitute, as it seems to me at least, the true interest 

 of natural history, and may even give us the clue to 

 senses and perceptions of which at present we have no 

 conception. 



