A NATURALIST. 49 



What purposes either of these racers serve in the great 

 economy of nature, has not yet been ascertained, and 

 will scarcely be determined until our store of facts is far 

 more extensive than at present. Other and still more 

 remarkable inhabitants of the brook, at the same time, 

 came within my notice, and afforded much gratification 

 in the observation of their habits. 



