. A final report on the Crustacea of Minnesota, included in the orders Cladocera and Copepoda, together with a synopsis of the described species in North America, and keys to the known species of the more important genera . distributed Note.—As the systematic part of this work draws to a close, anote is received from Prof. Birge, who was so kind as to glancethrough advance sheets of the portion upon Cladocera, Prof. Birgeinforms me that his Scapholeberis nasuta is the same as S. (Daph-nia) aurita, Fischer, as published in 1849 in the Bull. Natur-forsch. Gesellsch. in Moscaii, Bd.
. A final report on the Crustacea of Minnesota, included in the orders Cladocera and Copepoda, together with a synopsis of the described species in North America, and keys to the known species of the more important genera . distributed Note.—As the systematic part of this work draws to a close, anote is received from Prof. Birge, who was so kind as to glancethrough advance sheets of the portion upon Cladocera, Prof. Birgeinforms me that his Scapholeberis nasuta is the same as S. (Daph-nia) aurita, Fischer, as published in 1849 in the Bull. Natur-forsch. Gesellsch. in Moscaii, Bd. 22. This paper I have not Prof. Birges suggestion, then, read on page 43. Sp. 4, Scapholeberis aurita, Fischer. Daphnia aurita, namita, 176 TWELFTH ANNUAL REPORT. CHAPTER IV. COLLECTING, PRESERVATION AND MISCELLANEOUS NOTES. The appliances employed in the capture and study of Entomo-straca are, in the main, those employed by the student of aquaticvegetation. The first in order of importance is the hand-net andits accompaniment, long rubber boots, such as cover the entireleg being preferable. Thus equipped, the student can collect byfar the greater numbe* of fresh-water Crustacea. The net is bestmade by obtaining an ordinary gaff or dipping net of extrastrength but small size. If jointed, the ferrule must be unusuallystrong, not, indeed, because of the weight or activity of the prizes,but because it is often necessary to lift a net full of water, which isa greater strain than the strongest fish would produce in a netwith open meshes. The ring of such a net is furnished with a me-dium-sized bag of some porous but still rather close fabric. Thewriter usually uses for this purpose the thinner variety of floursacking. This
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