Smith—Algae Found in Wisconsin Lakes. 
531 
A PRELIMINARY LIST OF ALGAE FOUND IN 
WISCONSIN LAKES 
GILBERT MORGAN SMITH 
Notes from the laboratory of the Wisconsin Geological and Natural 
History Survey IX. 
At the request of Director Birge of the Wisconsin Geologi¬ 
cal and Natural History Survey, a phycological study of the 
lakes of the state was undertaken. This paper presents the 
results to date. The determination of the various phyto¬ 
plankton is emphasized especially, and only cursory atten¬ 
tion paid to littoral forms. Collections, employing the usual 
methods of obtaining plankton, were made during the sum¬ 
mers of 1914 and 1915. The specific determinations are based 
on camera lucida drawings of living material; since I find 
that many of the finer points are lost on preservation. At 
present only the eastern half of the state has been studied, 
but it is expected that the survey will be extended to other 
sections. The thoroughness of the work varies from single 
plankton catches in some lakes, to close observation during 
an entire season on others. The Madison Four Lakes, 
Devil’s Lake, and certain lakes of the Oconomowoc-Waukesha 
region have been studied the most thoroughly. In citing the 
distribution of various species the caption “along shore” 
has been used to include the algae epiphytic on rocks, those 
epiphitic on Phanerogams, and those which grow among the 
Phanerogams in sheltered places. 
The large number of species new to North America is not 
surprising, when one considers that with the exception of 
Miss Snow’s investigations of Lake Erie, there has been prac¬ 
tically no systematic work done on North American phyto¬ 
plankton. In the following list of species new to the continent, 
the plankton are indicated thus (*). 
