BULL. U. S. B. F. 1912. 



PLATE LXXXII. 



FIG. 63. Fish thyroid tumor showing tubular type resembling- the struma of Geisslar, as illustrated in plate 6, 

 figure 27 of L,anghans' article. X160. 



fai fefV^: 



FIG. 64. Section of fish thyroid tumor. Solid type. From five-months-old domesticated brook tro 



