THE AQUARIUM, JULY, 1893. 



53 



THE SALMOIST-TROUT. 



Sahno frutta. 



Die Lachs-Forelle. La truite de mer. 



The salmon-trout is very much like 

 the salmon in shape ; the head, how- 

 ever, is blunt, and the body in conse- 

 quence appears shorter. The color varies 

 considerably, though usually the back 

 is dark blue, while the sides and belly 

 are silvery, spotted here and there with 

 black. It is somewhat heavier at ma- 

 turity than the salmon, frequently 

 Aveighing between 50 and 60 pounds, 

 this weight not being anyways an excep- 

 tion. Its large size and weight may be 



THE GREAT LAKE-TROUT. 



Sahno lacustru 



Die See-ForeUe. 



La trvite de lacs. 



This species is best distinguished by 

 the caudal fin or tail, which instead of 

 being forked is as straight on the edge 

 as though it had been cut olf. The 

 coloring also is different from those 

 named above. The back is of a dark 

 bluish-green, the sides and belly silver- 

 white and marked with black spots en- 

 circled with a yellow rim. It is found 

 native in the great lakes of Switzer- 

 land, Bavaria, Austria, Ireland and 

 Scotland. In these countries it is es- 



The Dolly Varden Trout. 

 Salvelmus malma. 



the result of a most voracious appetite. 

 In the breeding season they obey the 

 same habits as do the salmon, and, like 

 the latter, acquire their growth in the 

 salt water of the ocean. The color of 

 the flesh varies a great deal more 

 than that of other species, and has 

 been the cause of their receiving 

 two additional names: "Sea-trout" 

 when of a reddish tint, or, as com- 

 monly understood, '* salmon colored ;'' 

 and " bull-trout " when the flesh is 

 white or colorless. This difference in 

 color is due to a different diet, the 

 latter being not near as palatable as the 

 tinted fish. 



teemed the most valuable of all their 

 lake fish. The young are hardy, and 

 very readily withstand the vicissitudes 

 of transportation ; with equal facility, 

 adapting themselves to the changed 

 circumstances of pond culture. The 

 adult weighs somewhere from 30 to 40 

 pounds, the flesh is white, and in flavor 

 fullv on a par with the brook-trout. 



THE BROOK-TROUT. 



Sahno fontinalis. 

 Die Bach-Forelle. La truite. 



This handsome and well-known fish 

 is native in the United States ; it fre- 

 quents the clear water of running 



