Bull. U. S. B. F. 1912. 



Plate XCI. 



Fic. 84. — Section of wild Wisconsin brook trout. Raw liver feeding 12 months. Focal ikvclopment caroiuonia of tlie 

 tliyroid. Small group of follicles with columnar epithelium. Reduced colloid. Hypentiuia atiout fullicks, Al periphery 

 normal unaltered thyroid follicles. X86. 











KiG. 85. — Wild Wisconsin brook trout. Raw heart feeding 12 months. Beginning carcinoma of the Ui>ruid. XSh. 



