FOREST, LAKE, AND RIVER 



ing or shading appears on each side of the lower 

 jaw. The dorsal fin is high and long, the upper 

 and backward range of the posterior and bifid rays 

 extending as far as the adipose fin. A dark grayish 

 color pervades this imposing flag with paler irregu- 

 lar markings and cross rows of deep-blue spots, 

 edged with lake-red. 



The second species of grayling {Thymalis tricolor) 

 is the one found only in Michigan waters, but now 

 gradually disappearing, owing to the depredation 

 of the trout upon its spawn and fry, the grayling 

 spawning in the spring, — a time when fontinalis is 

 recovering from its winter torpor and eager for 

 food of any kind. Doubtless more fatal to the in- 

 crease or preservation of the grayling than even 

 the trout, is the lumbering on the rivers of Michi- 

 gan in the spring of the year ; the eggs are torn 

 from the beds, dispersed and destroyed, by the 

 rapidly descending logs in the comparatively 

 shallow grayling streams. 



The Michigan grayling is similar in coloration 

 to its Arctic congener, but with more varied beauty 

 in the hues of its dorsal fin, which has " a black 

 line along its base, then a rose-colored one, then a 

 blackish one, then rose-colored, blackish, and rose- 

 colored, the last stripe being continued as a row 

 of spots." Above these lines there is a row of 



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