184 American Fisheries Society 



The first fish weighs about ten and one-half pounds, and 

 the second five pounds. The second one is from the lake, 

 from those waters that run down into the Rio Grande. 



This third one belongs to an introduced species, Salvc- 

 linus fontinalis, and is from a lake somewhere in the 

 Rocky Mountains here; but they grow also as heavy as five 

 pounds in lakes, and they do not grow more than half that 

 size in the rivers, and much smaller in the smaller streams. 

 They also retain their size and beautiful colors as they are 

 brought from the New England states or Pennsylvania. 

 The habitat of the last trout {Salvelinus fontinalis) ranges 

 from Georgia all through the Allegheny Mountains, Penn- 

 sylvania and up to the British possessions. The first one 

 is from California, and the second one I will refer to in my 

 paper. 



I have also a specimen which, after I get through my 

 paper, I will refer to. 



In regard to the food of the trout of the Rocky Moun- 

 tains I have samples preserved so that you can see what the 

 trout live on, and I will say that the same aquatic insects 

 destroy the eggs and the young of the trout. 



The species is distributed throughout the inter-moun- 

 tain states. As stated by Dr. Jordan: "It was born in 

 Alaska and has worked its way southward and eastward 

 into the streams of the great Rocky Mountain region. 

 It is one of the handsomest and finest, yet it has rarely 

 been transplanted to waters of other than those to which 

 it is native. This trout is usually known as the 'cut- 

 throat' trout, from the half hidden gash of deep scarlet 

 which is always found just below the base of the lower 

 jaw. Other marks are the rather long head, which 

 forms nearly the fourth of thei length of the body from 

 the snout to the base of the caudal fin. Almost always 

 there is a narrow line of very slender teeth along the 

 middle lines of the base of the tongue, besides the larger 

 teeth, which surround the edge of the tongue in all trout. 

 The body is usually well spotted, and the spots are a 



