104 Salmonidae 



where they are often very logy, one is occasionally hooked 

 which tries to the utmost the skill of the angler to prevent his 

 tackle from being smashed and at the same time save the fish." 



Of the various forms derived from Salmo clarkii some mere 

 varieties, some distinct species, the following are among the 

 most marked: 



Salmo henshawi, the trout of Lake Tahoe and its tributaries 

 and outlet, Truckee River, found in fact also in the Humboldt 



FIG. 66. Tahoe Trout, Salmo henshawi Gill & Jordan. Lake Tahoe, California. 



and the Carson and throughout the basin of the former glacial 

 lake called Lake Lahontan. This is a distinct species from 

 Salmo clarkii and must be regarded as the finest of all the cut- 

 throat-trout. It is readily known by its spotted belly, the 

 black spots being evenly scattered over the whole surface of 

 the body, above and below. This is an excellent game-fish, and 

 from Lake Tahoe and Pyramid Lake it is brought in large num- 

 bers to the markets of San Francisco. In the depths of Lake 

 Tahoe, which is the finest mountain lake of the Sierra Nevada, 

 occurs a very large variety which spawns in the lake, Salmo 

 henshawi tahoensis. This reaches a weight of twenty-eight 

 pounds. 



In the Great Basin of Utah is found a fine trout, very close 

 to the ordinary cutthroat of the Columbia, from which it is 

 derived. This is known as Salmo clarkii virginalis. In Utah 

 Lake it reaches a large size. 



In Waha Lake in Washington, a lake without outlet, is found 

 a small trout with peculiar markings called Salmo clarkii bou- 

 vieri. 



In the head-waters of the Platte and Arkansas rivers is the 

 small green-back trout, green or brown, with red throat-patch 



