WHITE PERCH, SMELTS, ETC. 217 



conducted in 1907 at Wayne, Pa., by Nathan 

 Buller, wlio reported that at his station the 

 suckers began to ripen about June 1, and 

 by the 12th most of them were ready for spawn- 

 ing. It was found to be remarkably easy to 

 take the eggs and milt, handled exactly as with 

 brook-trout. The eggs passed from the female 

 separately and as freely as those of the char, 

 while the milt was extracted with ease. The 

 fish were handled with great care, given a 

 salt bath immediately after the stripping, and 

 of the two or three dozen used none died. 

 Each female, which was the size of the ordi- 

 nary adult, yielded approximately 5,000 eggs. 

 When first expressed, they were about the size 

 of the spawn of lake-herring and of a whitish 

 flesh-colour. They were treated the same as 

 trout-eggs, and there was no adhesion during 

 the period of resting and washing. 



After fertilising and washing, the eggs were 

 set aside for a quarter of an hour. Impregna- 

 tion and water-hardening left the eggs round 

 and increased the size about one half. In three 

 days they changed to an oval form and showed 

 a distinctly light spot, similar in shape to the 



