Where Collections were Made. 
277 
The most important collection of the excursion was made at 
Minocqua in lake Kawaquesaga. This is a very irregular sheet 
of water, whose numerous shallow bays are filled with an 
abundant growth of Utricularia and other water plants. Its 
depth is not over thirty feet in any place which I visited. 
Thirty-nine species of Cladocera were found here, the most re¬ 
markable being the new species, Bunops scutifrons and Chydo¬ 
rus faviformis. Here, too, Acantholeberis curvirostris and 
Streblocerus serricaudatus were found for the first time. 
The other lakes examined in northern Wisconsin were Julia, 
Tomahawk, Twin, and Pioneer. They are much alike in 
-character. They are twenty to thirty feet deep, rather 
regular in outline, at least in the parts visited. The bottom 
is sandy, the shore abrupt with little marsh and few water 
plants. Rushes grow in the shallower parts but usually 
spring from the sand, so that the conditions are not the best for a 
large variety of Cladocera. Holopedium gibberum was found in 
-only one of these lakes, lake Julia at Rhinelander. Leptodora 
hyalina did not occur at all, although it was looked for. The 
species has however been found in the same region at Waters- 
meet, Mich., so that no conclusion as to its distribution can be 
drawn from its absence in these cases. 
Gogebic lake, Michigan, is a large lake about fourteen miles long 
and two to three in width. It is shallow,being only about twenty- 
two feet deep at the southern end which was the part I visited. 
Into this end the Slate river flows and there is an abundant 
growth of weed. There are many littoral species, and as the 
lake is so long and so much exposed to the wind, the pelagic 
species are mingled with the littoral fauna. Here was found a 
remarkable variety of D. hyalina , whose crest resembles greatly 
that of D. intexta , Forbes. In this lake were found the rare 
forms, Anchistropus minor , Rirge, Chydorus rugidosus , Forbes, 
Chydorus faviformis , Birge. 
Pelagic collections were made at Ashland and Bayfield, Wis. 
Nothing of especial interest was found except Holopedium gib¬ 
berum at Bayfield and a single specimen of Macrothrix rosea at 
the same place. 
