714 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [14] 



Daphnia laevis Birge. 



A single specimen of this strictly American species occurred in my 

 Lake Michigan! me collections. 



Daphnella brachyura Lievin. 



Excessively abundant in Lake Michigamme, where it was the common- 

 est crustacean, but not noticed in the Lake Superior material. 



Sida crystallina O. F. M. 



Very abundant in the rather dirty waters of PAnse Bay, but not seen 

 elsewhere. 



Holopedium gibberum Zaddach. 



A very remarkable form included among the pelagic species of the 

 European lakes, and hitherto reported in America only from the deeper 

 waters of Lake Michigan.* Taken in moderate number at PAnse, in 

 shallow water from the pier. * 



The following lists will show how the species above mentioned were 

 associated under the circumstances represented by my collections: 



Marquette breakwater, August 9, surface, shallow water, sandy bot- 

 tom, bright weather, good wind. Fairly full collections. 



Polyphemus pediculus, very rare. 

 Chydorus sphwricus, few. 

 rugulosus, few. 

 Bosmina longirostris, few. 

 Daphnia intexta, not uncommon. 



Diaptomus sicilis, very abundant. 



imperfectus, very abun- 

 dant. 

 Epischura lacustris, a few. 

 Limnocalanus macritrus, rare. 

 Cyclops thomasi, common. ' 



Off Light-House Point, near Marquette, August 9, 3 p. m., deeper 

 water, sandy bottom, bright weather, high wind. Net hauled at a 

 depth of about 40 feet. Collection scanty. 



Diaptomus sicilis, common. | Cyclops thomasi, a few. 



imperfectus, common. Leptodora hyalina, very few. 



Epischura lacustris, a few. I Bosmina longirostris, several. 



Limnocalanus macrurus, a few. | Daphnia intexta, a few. 



Marquette breakwater, August 11, at 5 a. m., clear, still. A scanty 

 collection. 



Diaptomus sicilis, common. I Chydorus rugulosus, several. 



imperfectus, common Bosmina longirostris, many. 



Canthocamptus, sp., a few. Daphnia intexta, few. 



Cyclops thomasi, common. | 



Marquette harbor, August 11, 9 p. m., clear, calm, shallow water, sur- 

 face. A large collection. 



Diaptomus sicilis, very abundant. 



i )nperfectus,\ ery ab nndan t . 

 Epischura lacustris, common. 

 Cyclops thomasi, common. 



agilis, less abundant. 

 Eurycercus lamellatus, several. 



Alona ohlonga, few. 

 Pleuroxus procurvus, few. 

 Chydorus spharicus, few. 

 Bosmina longirostris, several. 

 Daphnia intexta, many. 



* "On some Eutomostraca of Lake Michigan and Adjacent Waters." Araer. Nat., 

 xvi, p. 641. 



