176 



Bass, Pike, and Perch 



difference is apparent between these various 

 species as to form and coloration,^ and their 

 habits are similar, all loving clear, cold, and swift 

 water, with gravelly or sandy bottom. They 

 feed on insects and their larvae, small minnows, 

 crustaceans, and such small organisms. They 

 spawn in the spring. The eggs are smaller than 

 trout eggs, running seven to the inch. They 

 hatch in from ten days to two weeks, according 

 to temperature of the water. 



THE ARCTIC GRAYLING 



(Thymallus signifer) 



The Arctic grayling was first described by 

 Sir John Richardson, in 1823, from specimens 



1 SPECIFIC CHARACTERIZATIONS OF THE 

 GRAYLINGS 



