Plate XCIX. 
Bull. U. S. B. F. 1912. 
Kk;. U)0. — Hybrid yearling: salmon, barffe protruding tumor showing marked change with reversion toward normal 
type as the result of treatment with iodine added to the water by continuous flow in the proportion of 1 : 5«0UU,00() for 24 
da\'s. (ireat visible reduction in size of tumor. Fish 1083. table ix. X86. 
Fk;. 101. — vSection through tumor retrograding as the result of treatment witli potassium iodide added to the water 
by continuous flow in a concentration of 1 : 5>000.00(). at the end of 31 days, barge area sliowing organization by connective 
tissue, previous hemorrhage in substance of tumor induced bv treatment, cireat reduction in size of tumor. Fish 1060. 
table IX. X136. 
