VARIETIES OF TROUT. 81 



fresh source or stream, and at the other end 

 of the side of the box there were a number of 

 holes to permit the exit of the water : the 

 bottom of the box was filled with pebbles and 

 gravel of different sizes, which were kept co- 

 vered with water that was always in motion. 

 In November or the beginning of December, 

 when the trout were in full maturity for 

 spawning, and collected in the rivers for this 

 purpose upon beds of gravel, he caught males 

 and females in a net, and by the pressure of 

 his hands received the ova in a basin of water, 

 and suffered the melt or seminal fluid to pass 

 into the basin ; and after they had remained 

 a few minutes together, he introduced them 

 upon the gravel in the box, which was placed 

 under a source of fresh, cool, and pure water. 

 In a few weeks the eggs burst, and the box 

 was filled with an immense number of young 

 trout, which had a small bag attached to the 

 lower part of their body, containing a part of 

 the yolk of the egg, which was still their nou- 

 rishment. In this state they were easily car- 

 ried from place to place in confined portions 

 of fresh water for some days, requiring appa- 



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