34° SEVENTH REPORT OF THE FOREST, FISH AND GAME COMMISSION. 



The average individuals of this species are less than i foot in length, but speci- 

 mens measuring more than 2 feet and weighing 13 pounds have been recorded. At 

 Neosho, Mo., the young have been artificially grown to a length of nearly i foot in 

 a year. 



The Rainbow feeds on worms, insect larvre and salmon eggs. In streams in 

 which the California Salmon and Rainbow exist together, the Rainbow is more 

 destructive to the salmon eggs than any other species. Spawning takes place in 

 winter and early spring, varying with temperature and locality. The bulk of the 

 eggs are usually taken in January, February and March, and the average yield 

 from each female is about 900 eggs. A few of the females spawn when two years 

 old, but about one-half of them begin at three years. The egg is from one-fifth to 

 two-ninths of an inch in diameter ; it has a rich cream color when first taken, chang- 

 ing to pink or flesh color before hatching. 



The Rainbow will live in water of a much higher temperature than the Brook 

 Trout will endure and it thrives in tidal streams and even in salt water. On Lon? 

 Island, for example, the South Side Sportsmen's Club obtains a great deal of fine 

 sport with this trout in the estuary of its trout brook. The flesh of the Rainbow 

 is generally much esteemed, and in most localities the game qualities of the fish are 

 scarcely inferior to those of the Brook Trout. 



Large Rainbow Trout do not stand transportation well when ice is used to cool 

 the water in which they are carried. They frequently injure their eyes, and become 

 blind soon after the end of a journey. They are inveterate fighters, and the strong- 

 est invariably rules and harasses the rest. Contrary to what has been stated hereto- 

 fore, they will not endure high temperatures as well as the Brook Trout, at least in 

 the aquarium. 



66. Swiss Lake Trout (Salnio Icmanns Cuvier). (Introduced.) 



Salmo Icmanus Cuvier, Regne Anim. fide (iiinther; CiiJNTHER, Cat. Fish. Brit. Mas., 



VI, 81, 1866. 

 Salmo trutta Jurine, Mem. Soc. Phys. Geneve, III, i, 158, pi. 4, 1825. 

 Fario lemanus Cuvier & Valenciennes, Hist. Nat. Poiss., XXI, -300, pi. 617 (male), 



1848. 

 Swiss Lake Trout Atkins, Rept. U. S. F. C, XVII, XVIII, XIX, 1893 and 1894. 



Head well proportioned in its shape, of moderate size, body rather stout ; 

 preoperculum with a distinct lower limb, operculum rather broad and high ; snout 

 of moderate length, rather produced in the male se.x, ia which a mandibular hook is 

 developed in the spawning season ; ma.xillary longer than the snout, and at least as 



