DEVELOPMENT OF YOUKG FISH. 105 



the body. I have already ascertained one 

 fact, and this (as the question has frequently 

 been put to me) I shall venture now to 

 mention. The eggs do not grow — i. e.^ they 

 do not increase in circumference or in 

 diameter — but the fish inside them most 

 certainly increases in bulk, till at last it 

 becomes so large that the egg-shell suddenly 

 • bursts, and out comes the young fish. 



I have never yet seen a more beautiful 

 sight than the gradual development of the 

 young salmon and trout. We begin with a 

 globule of albumen (or white of Qgg) ; we 

 see within it a faint line, and two black spots ; 

 day by day these become larger till the 

 young fish is born. Time goes on ; the 

 umbilical vesicle is absorbed, the colour 

 appears on the scales, the long single crests 



