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



Plate XCI. 



Kl<;. 84. — Section of wild Wisconsin brook trout. Raw liver feedinn IJ months, hocal developnitnl CMrcinoni.i of the 

 thyroid. Small group of follicles with columnar epithelium. Reduced colloid. Hypersemia about follicles. At neripherv 

 normal unaltered thyroid follicles. X86. 



Fig. S5. — 



-Wild Wisconsin brook trout 



Raw heart feeding 12 niouths. BegiuniiiK carcinoma of the th.\ roid. X.Sh. 



