MILNER FISHERIES OF THE GREAT LAKES. 45 



merous. At Poiut aux Barques on the north shore of Lake Michigan, 

 where a very large type of the ^yhite-flsh Avas found, the stomach-con- 

 tents were entirely of the Jli/sis relicta Loven. In the Sault Sainte Marie 

 Eapids in July a mass of small Chrysalides was found in the stomachs 

 of a number of white-fish. In October, from the same locality, the 

 larvaB of the caddis-tly were found in the stomachs, apparently carefully 

 separated from their artificial coverings. Stomachs opened in Lake 

 Superior contained principally the Mi/sidw. 



At Ilocky Island, in the northwestern part of Lake Michigan, a vessel 

 with a cargo of wheat was lost a few years ago. The fishermen say that 

 white-fish were taken in that vicinity for several years afterward with 

 wheat ill their stomachs. 



Rarely white-fish will take a bait. The breakwater protecting the 

 Illinois Central Eailway at Chicago was formerly a favorite fishing- 

 place, and in early summer was oft-eu lined with a row of boys and men 

 fishing for perch. There was seldom a day passed but that a few white- 

 fish were taken. Mr. Trompe, of Sault Sainte Marie, has frequently 

 taken them in that locality with a hook baitecl with a May-fly, Epheme- 

 ridce. At a fishing-dock on Sand Island, one of the group of the Apostle 

 Islands, Lake Superior, there were a few taiien this season with a worm- 

 bait. 



The leech, Icfhi/ohdeUa inmciata Smith, parasitic on the white-fish, 

 aud numerous in some localities, was in no instance found in the stomach. 

 This corroborates Dr. Hoy's observations. 



A similar fact was noticed afterv/ard at Detroit River. A parasitic 

 crustacean, a lyernft'rt, was found adhering to the white-fish in numbers, 

 and, though many stomachs were examined, in no instance were any 

 of the parasites found in the contents. 



Both the Lenid'a and the Icthi/ohdella are related to species made use 

 of as food by the white-fish as near in the one instance, as being in the 

 same class, and the other in the same order. 



The mouth is constructed for nibbling along the bottom, the opening 

 beiug directed nearly downward, and they gather in the small life of 

 the bottom and the gravel as they move slowly along. 



Dredging in the lake at different localities and examination of stomach- 

 contents at numerous points prove that the crustaceans and the mollusk, 

 constituting the principal food of the white-fish, are distributed through- 

 out the lake-bottom, in all localities aud at all depths, over about twenty 

 fathoms. 



In Torch Lake, a deep inland lake in the Grand Traverse region, Mich- 

 igan, where a large type of white-fish is found, the dredge brought up 

 the same species of crustaceans and mollusks as were found in Lake 

 Michigan. 



The failure to find food in the stomachs of white-fish has frequently 

 resulted from the fact that the fish examined were taken from the pound- 

 nets, where they had remained long enough to digest the contents of the 



