THE r ROUTS 



Another charr, the Lac de Marbre [Sahelinus 

 oquassa marstoni), is also closely allied to the blue- 

 back of the Rangeley Lakes, although it reaches a 

 greater size and has its tail more deeply forked. Its 

 color is dark brown on the back with an iridescent 

 bluish tint, and the red spots are very faint and 

 apparently do not exist in many specimens, with 

 the exception of a few along the lateral line, which 

 are very indistinct. This trout has only been 

 found, as yet, in Lac de Marbre, Ottawa Co., 

 Province of Quebec, Canada. 



The Great Lake trout {Cristivomer namaycush) is 

 distinguished anatomically from the other charrs 

 by the presence of a raised crest behind the head 

 of the vomer on the roof of the mouth, the crest 

 being armed with teeth. Its head is very long, 

 with the upper surface flattened, and the mouth is 

 large ; tail well forked, and the fatty or second 

 dorsal fin comparatively small. The general col- 

 oration is dark gray, sometimes pale, sometimes 

 almost black. The coloration of the spots distin- 

 guishes lake trout on sight from the other charrs 

 which show red coloration, while the spots on the 

 namaycush are pale and grayish with often a red- 

 dish tinge only. It grows to a length of about 

 thirty-six inches, and has been known to reach the 

 weight of sixty to one hundred pounds, but the 



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