Report U. S. F. C. 1899. l,To face page XCVI.; 



Plate XXII 



Fiff. 1. 



Fig. 0. 



Fis. 7. 



Fig. 10. 



Fig. 11. 



DEVELOPMENT OF SALMON EGGS FROM TWO DAYS OLD TO THIRTY DAYS AT 54° F. 



Fig. 1. Appearance of egg two days after fertilization, and wliile it can be handled. 



Fig. 2. Egg at four days, when it can be picked over but must be handled with extreme care. 



Fig. 3. Egg at six days, when it should not be touched. 



Figs. 4, rt, 6, 7, and S.' Egg on tlie seventh, eighth, ninth, and tentli days, wlicn it is very tender and 



can not stand handling. 

 Fig. 9. Egg at eleven days, when it can- be handled but with extreme care. 

 Figs. 10, 11. and 12. Egg at fourteen, twenty, and thirty days, when very hardy. 



After the loop, shown in figs. 6, 7. and .s, has closed and all trace of it disappeared, as in fig. 9. the 

 ogg can be picked over, and from that time on it grows constantly more hardy and can be shipped. 



(Drawings by Leroy Ledgerwood.) 



