434 BULLETIN OP THE BUREAU OP FISHERIES. 



Table IV.— Incidence of Thyroid Carcinoma in Dirt Ponds, Craig Brook, 1909-1912. 



(Where there are two entries for August, igog. under total number of fish, the number before and after removal of tmnored 

 fish is indicated.] 



Pond 



No. 



Lot No. 



ig^oT 



I99S 



20I7 



3027 and 2028B 

 2133 



2133 



2133 



1944 



1950 



I934A 



I939A 



1937 



■939 



1947 



1947A 



Age. 



Aug., 

 July. 

 July. 



Aug., 



July. 

 July. 

 Aug., 

 July. 

 July. 

 Aug.. 

 Aug., 

 July, 

 July, 

 July. 

 July. 

 July. 

 July. 

 Aug., 

 Aug., 

 July. 

 July. 

 Aug., 



Aug., 



July. 



July. 

 Aug. 

 July. 

 July, 

 Aug , 



Aug., 



July, 

 July, 

 Aug., 



Aug., 



July. 

 July, 

 Aug , 



Aug. 



July. 

 July. 

 Aug. 

 Aug 

 July. 

 July, 

 Aug. 

 Aug. 

 July. 

 July, 

 Aug. 



Species. 



Landlocked salmon. 



....do 



....do 



Hybrid salmon a. . . . 



do 



do 



Hybrids'" 



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 



a Female, humpback; male, blueback. 



6 Female, brook trout; male, landlocked salmon. 



