38 NATURAL HISTORY. 



all obstacles, even a cataract, at a leap, so they often 

 escape from the net. They are much troubled by a 

 small -worm which harbors in the gills. 



The Huco (salmo hucho) is a smaller species and pecu- 

 liar to the Danube. 



The Lake or Salmon Trout (salmo lacustris) is nearly 

 as large as the river salmon, being mostly two feet long, 

 and weighing eight pounds. Its color is the same, but 

 spotted irregularly with red. This fish is very common 

 in the lakes of Switzerland, but in spawning time, mi- 

 grates up the rivers. The flesh, which is reddish, turns 

 a golden yellow when cooked, and is much esteemed. 

 The manner of taking it is either by the hook, seine, or 

 bow net. Lake trout feed on small fish, spawn, worms, 

 etc. 



The Common Trout (salmo fario) is the smallest of 

 the salmon family, measures from seven to ten inches, 

 weighs half a pound, is olive-green on the back, green- 

 ish-yellow on the sides, the under surface golden yellow, 

 and sprinkled all over with small beautiful black and red 

 spots. When the golden color predominates, they are 

 called the golden trout. Their teeth are many and 

 pointed ; living in the clear brooks and mountain streams, 

 they swim rapidly, and, like the salmon, overleap all 

 hindrances. The larvae of insects, worms, snails, young 

 fish, etc., serve the trout for food; sometimes they will 

 seize on a water snake. The manner of fishing for trout 

 is by a small seine, bow net, or hook and line. The 

 English mostly choose the latter, baiting the hook with 

 an artificial fly, made of silk and horse hair ; this bait, 

 held just above the surface of the water, is a sufficient 

 lure for the fish to spring at. As they not unfrequently 

 remain stationary with their heads up against the stream, 



