276 
Birge—Notes on Gladocera. 
lake Julia and in marshes ; lakes Tomahawk and Kawaquesaga in 
Oneida county, Pioneer and Twin lakes in Forest county, and 
Ashland and Bayfield harbors on Lake Superior. Mr. Cheney coll¬ 
ected in lake Yieux Desert on the line between Michigan and 
Wisconsin, and I have visited lake Gogebic in Michigan and 
have received material collected, at Watersmeet by Prof. C. 
R. Barnes. 
Collections were also made at numerous other points in north¬ 
ern Wisconsin, among them Goodnow, Harshaw, Hixon and 
Tomahawk on the Valley Division of the C. M. & St. P. R. R., 
Lac du Flambeau, Woodruff and Bolton on the M. L. S. & W. 
R. R., but they did not show any species not included in the 
lists from the lakes where more careful work was done. 
The lakes in which I collected differ considerably in charac¬ 
ter. Lake Winnebago is a large sheet of water, about thirty 
miles long by fourteen in width. It is very shallow—nowhere 
over twenty to twenty-five feet deep. At the place where my 
collection was made—about eight miles north of Oshkosh—the 
lake yielded a great amount of pelagic material and but little 
from the shore waters. Anchistropus minor is the only rare 
species found here. Lake Butte des Morts was visited only at 
the end nearest Oshkosh. The collection from this lake as well 
as that from lake Winnebago can not represent their fauna at 
all adequately. 
Green lake near Ripon has been thoroughly studied by Prof. 
C. Dwight Marsh so far as its pelagic Copepoda are concerned. 
Its physical characters are described by him in a paper pub¬ 
lished in the Transactions of this Academy, vol. VIII, p. 214. 
The lake is over 200 feet in depth. It afforded very few pe¬ 
culiar forms. Pleuroxus nanus was found here and this is the 
furthest point to the south at which it has been found. If 
further study shows this species to have a wider southern 
range, the Cladoceran fauna of the lake will not differ from 
that of the shallower lakes in the same region. 
Collections were made at Necedah and New Lisbon from 
streams, ponds and marshes. Latonopsis australis was found 
at the former place, the only locality where it has been found out¬ 
side of Madison. 
