80 SCIENCE SKETCHES. 



bird is like the bobolink. Gross feeding and easy pond 

 life enervate and deprave him. The trout that the chil- 

 dren will know only by legend is the gold-springled living 

 arrow of the white water ; able to zigzag up the cataract ; 

 able to loiter in the rapids ; whose dainty meat is the 

 glancing butterfly." 



The brook-trout adapts itself readily to cultiva- 

 tion in artificial ponds. It has been successfully 

 transported to Europe, and is already abundant in 

 certain streams in England and elsewhere. 



The " Dolly Varden " Trout {Salvelinus malmd) 

 is very similar to the brook-trout, closely resem- 

 bling it in size, form, color, and habits. It is 

 found in the streams of northern California, Ore- 

 gon, Washington, British Columbia, Alaska, and 

 Kamtschatka, mostly to the westward of the Cas- 

 cade Range. It often enters the sea, and specimens 

 of eleven pounds' weight have been obtained by the 

 writer in Puget Sound. The Dolly Varden trout 

 is, in general, deeper in body, and less compressed 

 than the Eastern brook-trout. The red spots are 

 found on the back of the fish as well as on the 

 sides, and the back and upper fins are without the 

 marblings and blotches seen in Salvelinus fon- 

 tinalis. In value as food, in beauty, and in ga- 

 miness, Salvelinus malma is very -similar to its 

 Eastern cousin. 



Allied to the true charrs, and now placed by us 

 with them in the genus Salvelinus, is the Great Lake 

 Trout, otherwise known as Mackinaw Trout, Longe, 

 or Togue {Salvelinus namaycusJi) . Technically, 

 this fish differs from the true charrs in having on 

 its vomer a raised crest behind the chevron, and 



