Report U. S. F. C. 1898. (To face page LXX 



Plate XIII. 



3. Whitefish, 12 hours, showing first cleavage. Water 38°, 4 Whitefish eggs, 18th hour. Water 38°, showing second 



segrmentation, four cells forrped 



5 Whitefish egg 24 hours. Water 38°. 6. Whitefish egg 48 hours. Water 38° 



DEVELOPMENT OF THE WHITEFISH EMBRYO 



