XXVIII.-FOOD OF FRESH-WATER FISHES. 



By Sidne\^ I. Smith. 



The following notes were made almost wholly from the contents of 

 the stomachs of a few fresh-water fishes collected by Mr. J. W. Miluer. 



[ITumbers in brackets ([ ]) are the numbers under which specimens were received.] 



White-fish, {Coregomis albits.) 



[No. 202.] Specimens from Outer Island, Lake Superior, contained 

 great quantities of Mysis relicta ; Fontoporeia Hoyi ; and Fisidium abdi- 

 tum, yar. aljyssorum ; and with these were a few specimens of dipterous 

 larvfB of the genus Chirononms ; a small worm, {Lumhricus lacustris ;) 

 Daphnia galeata ; D. pellucida ; and a small species of Flanorhis. 



[No. 115,] From Sand Island, Lake Superior, Fontoporeia Hoyi; 

 larvae and pupre of Chironomus ; Valvata sincera ; and Gyraulus parvus. 



(No number.) From Sanlt Sainte Marie, one lot contained scarcely 

 anything but small shells. Among these, Valvata tricarinata ; V. sincera, 

 Yav. striateUa ; Amnicolagenerosa ; A.paUda 0)', Gyraulus parvus ; and a 

 species of iiwrntcft were in abundance ; while there were fewer specimens 

 of Goniohasis livescens ; Fliysa vinosa (?), young; Sphwrhwi sfriatinum ; 

 and Fisidium compressum. 



[No. 407.] Other specimens contained nothing but the remains of 

 insects, among which were the imagos of tw'o species of Biptera ; larvte 

 and pupae of Chironomus ; larvae and i^upae of some specimens of Eplie- 

 meridcc : great numbers of the larvae, pupae, and subimagos of a species 

 of Hydropsyche ; and the larvae of a species of some other genus of P/try- 

 ganeidcv. 



[No. 3S0.] From Ecorse, Mich., specimens contained a species of 

 Sydracluia, the leg and the scales from the wing of some lepidopterous 

 insect, and a species of Limncea. 



White-fish which I examined at lie Eoyale, in August, 1871, con- 

 tained scarcely anything but Mysis relicta and Fontoporeia Hoyi. 



[No. 65.] Ecorse, Mich. Eemains of a small fish and several speci- 

 mens of a species of water-boatmen, [Corixa.) 



Specimens of Goregonus quadrilateral is from Madeline Island, Lake Su- 

 perior, contained a number of specimens of a leech [Xephelis fervida) 

 and a neuropterous larva allied to Ferla. 



These few observations are sufficient to show that the white-fish, like 

 the difierent species of trout, feeds on a large number of species be- 

 longing to very different groups of animals. In this brief enumeration, 



