G96 KEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



DAPHNIA PULEX (?). 



Baii-d, Nat. Hist. British Eatoraostraca, p. 89, pi. 6, figs. 1-3, 1S50 ; Lilljeborg, 

 Cladocera, Ostracoda et Copepoda iu Scauia, p. 30, pi. 2, figs. 2, 3, pi. 16, figs. 

 10-12, 1853; Leydig, Naturgeschicbte der Daphnideu, p. 117, pi. 1, figs. 1-7, 

 1860 ; Miiller, op. cit., p. 110, pi. 1, fig. 4. 



A species which it is not easy to distiuguish, by the figures and 

 descriptions referred to, from the common Baphnla of Europe was 

 found in great abundance in a small pond at Sault Sainte Marie by 

 Mr. J. W. Milner. A more careful examination than I have been able as 

 yet to make may, however, show it to be a distinct but very closely allied 

 species. 



B0S3IINA, species undetermined. 

 Taken at the surface a few mile's south of Saint Iguace Island. 



EURYCEEOUS LAMELLATUS Baird(?). 



Op. cit., p. 124, pi. 15, fig. 1. 



Ljjnceus lamellatus Lilljeborg, op. cit., p. 71, pi. 5. figs. 7-12 ; pi. 6, figs. 1-7 ; pi. 7, 

 fig. 1, 1853 ; Leydig, op. cit., p. 209, pi. 7, figs. 52-56, pi. 10, fig. 72. 



A species of Uurycerciis, identical with or closely allied to the typical 

 species of Europe, was dredged, among Cladophora, in 8 to 13 fathoms, 

 on the south side of Saint Ignace Island, and is, doubtless, common in 

 other similar situations. 



Leptodora hyalina Lilljeborg. 



Ofversigt af Veteuskaps Akademieiis Forliaudlingar, 1860, p. 265, pi. 7, figs. 1-22; 

 Miiller, op. cit., p. 226, j)!. 6, figs. 14-21; G. O. Sars, Om en dimorph Uudvik. 

 ling saint Geueratiousvoxel hos Leptodora, Forbaudlin ger i Videusk. Selsk. i 

 Cbristiania, for 1873, pi. 1; Weismauu, Ueber Bau und Lebeuserscbeiuuugen 

 vou Leptodora hyaliua, Zeitscbrift fiir wissenschaftl. Zoologie, vol. xxiv, p. 

 349, pis. 33-38, 1874, 



A single somewhat mutilated specimen, which agrees well with the 

 descriptions and figures above referred to, came up in the dredge a few 

 miles south of Saint Ignace Island, in company with Daphnia galeata, 

 D. pellucida, &c., and, like them, was undoubtedly taken iu the dredge 

 on its way up. It is one of the largest and most remarkable forms of 

 Gladocera known. It is wholly transparent, and grows to fully half an 

 inch in length. The shell is very small, and incloses no part of the 

 body ; the head with the large eye at its extremity is produced far for- 

 ward; the basal portion of the natatory appendages is long and very 

 stout, while the rami are comparatively short and four-jointed; the six 

 pairs of legs are crowded together below the natatory appendages; and 

 the abdomen is very long, and the last segment terminates in two stout 

 stylets. 



OSTRACODA. 



Quite a number of species belonging to several different genera were 

 dredged at different points in the lake, one or two species occurring 



