434 



BULLETIN OF THE BUREAU OP FISHERIES. 



TABLE IV. INCIDENCE ov THYROID CARCINOMA IN DIRT PONDS, CRAIG BROOK, 1909-1912. 



[Where there are two entries for August, 1909. under total number of fish, the number before and after removal of tumored 

 fish is indicated.] 



Female, humpback; male, blueback. 



fr Female, brook trout; male, landlocked salmon. 



