G94 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



of the species are coufiaed to the shallow pools and other small bodies 

 of water about the lake, and do not occur, or only very sparingly, iu the 

 lake itself. 



Ephemerid^, species. 



The larva of one species was dredged in 32 fathoms in Xeepigon Bay. 



The species of this family did not seem to be abundant iu the lake 

 itself, and the cast skins of the pupie were nowhere, as far as my obser- 

 vations went, iu such great abundance as they are on the lower lakes. 



Hydropsyche, species. 



The larva of a species, belonging apparently to this geuus, was 

 dredged in 13 to 15 fathoms at Simmons' Harbor. The larva?, pupce, 

 and sub-imago of the same or a closely-allied species were found in great 

 abundance in stomachs of white-fish takeu at Sault Sainte Marie. 



Phryganeid^, species. (Plate Iir, figs. IS, 19.) 



The larvie of another Phrygaueid, inhabiting a cylindrical, tapering 

 tube, composed of bits of the stem of the CladopJiora, among which 

 it lives, were abundant in 8 to 13 fathoms on the south side of Saint 

 Iguace Island, and in 15 to 18 fathoms at Simmons' Harbor. The larvse 

 and pupa3 of the same or an allied genus were found in the stomachs 

 of white-fish taken at Sault Sainte Marie. 



ACARIXA. 



Hydrachna, species. 



A small, dark-colored species was dredged in 4 to G fathoms in the 

 cove at the eastern end of Saint Iguace Island. A species, apparently 

 the same, occurred iu the stomachs of the white-fish taken at Ecorse, 

 Mich. 



CRUSTACEA. 



PODOPHTHALMIA. 



Cambarus virtlis Hagen. (p. 638.) 

 Cambarus propinquus Girard. (p. 638.) 

 Cambarus rusticus Girard. (p. 639.) 

 Cambarus Bartonii Erickson. (p. 639.) 

 Mysis relicta Loveu. (p. 642.) 



TETEADECAPODA. 



AMPHIPODA. 



Hyalella dentata Smith, (p. 645.) 

 PoNTOPOREiA HoYi Smith, (p. 647.) 

 Gammarus limn^us Smith, (p. 651.) 

 Crangonyx gracilis Smith, (p. 654.) 



