156 



SCIENCE OF FISHING 



by the ice during the glacial period. There is not any strik- 

 ing difference in the three species and the two southern 

 varieties might have changed greatly since that time. Per- 

 sonally, I have never seen a grayling, but they are said to 

 be beautiful fish. They are of graceful shape and have 

 enormous brightly colored front dorsal fins. The back is 

 gray or bluish, and lighter beneath, and when taken from 

 the water is said to be iridescent like mother-of-pearl, show- 

 ing all tints and colors. It never exceeds two pounds in 

 weight. It is caught mostly in autumn on brook trout tackle, 

 with the artificial fly. 



