THE CRUSTACEANS OF LAKE MAXINKUCKEE.! 
By BARTON WARREN EVERMANN, 
Director of the Museum of the California Academy of Sciences, 
and 
HOWARD WALTON CLARK, 
Scientific Assistant, U.S. Bureau of Fisheries Biological Station, 
Fairport, Iowa. 
During the physical and biological survey of Lake Maxinkuckee, 
Indiana, carried on more or less intermittently from July, 1899, to 
October, 1913, for the United States Bureau of Fisheries, considerable 
attention was given to the Crustaceans inhabiting the lake and its con- 
necting waters. The full detailed report on those investigations will, 
it is hoped, be published elsewhere. In the present paper it is our pur- 
pose to present only the more important considerations and conclusions, 
largely omitting the vast body of details and observed facts upon which 
the present contribution is based. 
A very comprehensive study of the Plankton was made by Professor 
Chancey Judah, now of the University of Wisconsin. It is hoped the 
results of Professor Juday’s studies may be published soon. A similar 
thorough study of the Parasitic Copepods was made by Dr. Charles B. 
Wilson, a brief summary of whose report is made part of this paper. 
Except during the summer of 1899 and 1900, the field work on Lake 
Maxinkuckee was nearly all done by one or two investigators only. 
This made it impossible to pay ejual attention to all the groups of 
animals and plants; indeed, many groups could receive scarcely more 
than passing notice, while others had to be wholly neglected. Among 
those groups which received but slight attention are the worms, poly- 
zoans, protozoans, smaller crustaceans, insects, and the like. Although 
considerable collections were made in some of these groups, insurmount- 
able difficulty was experienced in finding specialists to work them up. 
Our reports on several of those groups are therefore necessarily brief 
and general in character. 
Occasional notes and memoranda were made regarding various spe- 
cies which we did not have opportunity to observe regularly or method- 
ically. Such of these as seem to possess some value or interest are given 
in the following pages. 
1 Published by permission of the U. S. Commissioner of Fish and Fisheries. 
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