218 FISH CTJLTUBE 



circle of a " ringer" trout-egg. For a while it 

 was thought by Mr. Buller that the eggs were 

 all ringers, but after close watching it was seen 

 that the ring kept changing and growing larger 

 until the tenth day, when the outline of the em- 

 bryonic fish became visible without a distinct 

 sign of the head or eyes. On the 15th day the 

 young fish began to break from the shell and 

 by the twentieth they were all out. When they 

 first emerged, the fry were white and possessed 

 a very heavy yolk-sac, which was entirely ab- 

 sorbed in five days. 



Subsequently sucker propagation was tried 

 by other fish-culturists with equal success, using 

 jars instead of troughs. No trouble whatever 

 was met with during the process of incubation. 

 The eggs remained free, and during the entire 

 period there was no indication of fungus. 



