Report U. S. B. F. 1904. PLATE Il. 
1. YOUNG PUFFERS (SPHEROIDES) 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 Springs, W. Va.) 
