Report U. S. B. F. 1904. 



Plate II 



1. YOUNG PUFFERS (SPHEROIDESl WITH GAS DISEASE INFLATION. 

 (Photograph by F. P. Gorham.) 



2. RAINBOW TROUT (SALMO IRIDEUS> FRY ABOUT 6 WEEKS OLD, SHOWING DISTENTION OF 



THE ABDOMEN WITH GAS. 

 (Photograph by T. Surber, White Sulphur Spring.s, W. Va.) 



