434 



BULLETIN OF THE BUREAU OF FISHERIES. 



Tablb IV. — Incidencb of Thyroid Carcinoma in Dirt Ponds, Craig Brook, 1909-1912. 



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

 fish is indicated.! 



Pond 

 No. 



r-8 

 9 



Lot No. 



1950T 



1995 



2017 



2037 and 2028B 



2133 



2133 



»>33 



1944 



19.^0 



1934 A 



1939A 



1937 



1939 



1947 



I947-^ 



Aug., 1909 

 July, 1910 

 July, 191 1 

 Aug., 1909 



July, 

 July, 

 Aug., 

 July, 

 July, 

 Aug., 

 Aug., 



July. 



July, 

 July, 

 July, 

 July, 

 July. 

 Aug., 

 Aug., 

 July, 

 July. 

 -*ug., 



.\ug,, 1909 



July, 

 July, 

 Aug. 

 July, 

 July. 

 Aug., 



.^ug , 



July, 



July, 



Aug., 

 •^ug., 



July, 

 July, 



Aug., 



.^ug., 



July, 

 July, 

 Aug., 

 Aun., 

 July. 

 July, 

 Aug., 

 Aug.. 

 luly. 

 July. 

 Aug., 



1910 

 191 1 

 1909 

 1910 

 1911 

 1912 

 1909 

 1910 

 191 1 

 1910 

 1911 

 1910 

 1911 

 1912 

 1909 

 1910 

 1911 

 1912 



1910 

 1911 

 1909 

 1910 

 1911 

 1912 



1909 



1910 



I9II 

 1912 



1910 

 1911 

 1912 



1909 



Z910 

 1911 

 I912 

 1909 

 I910 

 I9II 

 I912 

 1909 

 1910 

 I911 

 X912 



Age. 



Years. 



Species. 



Landlocked salmon. . 



do 



...do 



Hybrid salmon *>. . . . 



....do 



...do 



Hybrids 6 



....do 



...do 



. ..do 



Chinook salmon 



do 



...do 



Rainbow trout 



do 



do 



do 



do 



Landlocked salmon. 

 do 



...do 



...do 



do 



do 



do 



Brook trout 



do 



do 



do 



do 



do 



do 



do 



do 



do., 

 do., 

 do.. 



.do.. 



...do 



...do 



...do 



Scotch sea trout. 



....do 



...do 



...do 



...do 



....do 



...do 



do 



<* Female, humpback; male, blueback. 



6 Female, brook trout; male, landlocked salmon. 



