4 
lections were made at the mouths of 63 tributaries by 
agencies from all five member states of the UMRCC 
during the summer of 1966, and the results were sum- 
marized in a mimeographed compendium of the upper 
Mississippi River fisheries (Nord 1967). 
Since 1967 the Missouri Conservation Department 
has contributed the results of its investigations of the 
lower part of the river, and a few recent collections have 
been secured by Illinois Natural History Survey and Mis- 
souri Conservation Department personnel and by Larry 
Dunham, the biologist assigned to the river by the Ili- 
nois Department of Conservation. As a result of the 
UMRCC cooperative effort since 1962, collections are 
available for virtually the entire upper river (Fig. ole 
Fig. 2—Locations of collecting stations sampled since 1962. 
At each.site one to many minnow-seine collections were made, 
and at many of them electrofishing samples were also taken. 
ACKNOWLEDGMENTS 
We acknowledge the support of our respective ager 
cies and the Upper Mississippi River Conservation Com 
mittee, especially the following present and former mer 
bers of the Fish Technical Section: John G. Brascl 
John L. Funk, William J. Harth, Raymond C. Huble: 
Jr., Jerome H. Kuehn, Robert C. Nord, Roger Schot 
macher, and William C. Starrett. We are grateful t 
the following persons for making collections: Marv 
E. Braasch, Joe P. Bystry, Francis W. Collins, Robe: 
DeCook, William Dornack, Larry Dunham, Bob Dun: 
Alan Finke, Don Garver, Don Helms, Max Hensle 
James L. La Buy, David J. McGinty, Thomas Molamph 
Thixton Miller, Jack Newton, Paul W. Parmalee, Joh 
-“W. Robinson, Kenneth Russell, John Skrypek, Jer 
Stumpf, E. J. Trimberger, and Mark R. Weber. 
We are grateful to W. C. Starrett and P. G. Barnick 
for permission to use the unpublished records in the 
minnow-seine collections, to Kenneth D. Carlander f 
the loan of a critical specimen, to Robert E. Jenkins f 
counsel on records of redhorses, to George GC. Beck 
and James C. Underhill for advising us about certa 
Wisconsin and Minnesota fishes, and to O. M. Pri 
for providing photographs of alligator gars. Robert | 
Nord has freely provided help and encouragement, ai 
Lawrence M. Page and Marvin E. Braasch helped 
process collections and data, plot records, and provide a 
in a variety of other ways. Richard M. Sheets, Illinc 
Natural History Survey Technical Illustrator, design 
the cover, and Robert M. Zewadski, Associate Technic 
Editor of the Survey, edited the manuscript. 
SOURCES OF DATA 
A distribution map is provided for each species kno 
from three or more sites in the upper Mississippi Riv 
Records for specimens personally examined by one 
us are plotted with a solid symbol. A few of them dé 
back to 1944, but most are based on specimens tak 
since 1962. Specimens for most records are deposited 
the collection of the Illinois Natural History Survey; ' 
certain other records specimens are located in the U 
versity of Kansas Museum of Natural History and | 
University of Michigan Museum of Zoology. In af 
cases records are based on large specimens that w 
identified and then returned to the river. 
Supplemental records based on specimens not S¢ 
by one of us are plotted with hollow circles. Beca 
the emphasis in this paper is on present distribution, | 
hollow symbols represent the most recent published 1 
ords available from each locality. The source for ¢ 
hollow circle on the maps can be determined by © 
sulting the corresponding account in the list of spec 
where the sources are indicated. Published records t 
we regard as questionable and certain quite old reco 
are discussed in the annotated list but are not plot 
on the maps. 
ANNOTATED LIST OF SPECIES 
An asterisk preceding the name of a species den 
that we regard its presence in the river as accider 
