THE WHITEFISH OF SILVER ISLAND LAKE. MINNE- 

 SOTA. 



By George Wagner. 



In August,. 1909, Air. W. D. Tomlin, a mechanical engineer 

 of Duluth, Minnesota, and a wellknown writer on outdoor things, 

 submitted to Air. Jas. Nevin, Superintendent of the Wisconsin 

 Commissioners of Fisheries,, a sketch and a small photograph of a 

 whitefish, taken by him in Silver Island Lake, Minnesota. These 

 were referred to me for identification, but proved insufficient for 

 that purpose. In February, 1910, Mr. Tomlin sent me three spec- 

 imens of the same fish, brought to him at Duluth by trappers. 



Silver Island Lake is located on the border between Cook and 

 Lake Counties, R 6 W - 61 X., in the extreme northeastern part 

 of Minnesota. The region is but little explored and I have been 

 unable to obtain very definite data as to whether Silver Island 

 Lake drains into Hudson's Bay or into Lake Superior. I am in- 

 clined to think, however, that the former is the case. 



The specimens submitted to me were unfortunately gutted, 

 with the gills removed, and were slightly damaged by the fact 

 that they arrived while I was out of town. However, their exter- 

 nal features were fairly well preserved. It was immediately 

 apparent that they were rather different from anything known to 

 me from Lake Superior or Michigan, or from the inland lakes of 

 Wisconsin. 



The principal measurements made on the specimens are as 

 follows : 



X umber 1711a 



Sex ■. ? 



Length, mm 304 



Head in length 4.2 



Depth in length 3.4 



Eye in head 4.8 



Maxillary in head 3.6 



Dorsal height in head 1 .0 



