io6 



Salmonidae 



The Rio Grande trout (Salmo clarkii spilurus) is a large and 

 profusely spotted trout, found in the head-waters of the Rio 



Fro. 69. Rio Grande Trout, Salmo clarkii spilurus Cope. Del Norte, Colo. 



Grande, the mountain streams of the Great Basin of Utah, and 

 as far south as the northern part of Chihuahua. Its scales are 

 still smaller than those of the ordinary cutthroat-trout, and the 

 black spots are chiefly confined to the tail. Closely related to 



FIG. 70. Colorado River Trout, Salmo clarkii pleuriticus Cope. 

 Trapper's Lake, Colo. 



it is the trout of the Colorado Basin, Salmo clarkii pleuriticus, 

 a large and handsome trout with very small scales, much sought 

 by anglers in western Colorado, and abounding in all suitable 

 streams throughout the Colorado Basin. 



Hucho, the Huchen. The genus Hucho has been framed 

 for the Huchen or Rothfisch (Hucho hucho) of the Danube, a 

 very large trout, differing from the genus Salmo in having no 

 teeth on the shaft of the vomer, and from the Salvelini at least 

 in form and coloration. The huchen is a long and slender, 

 somewhat pike-like fish, with depressed snout and strong teeth. 



