10 
dance of the species in some of the large tributaries of 
the Mississippi River. Supplemental records for pools 
4-11 (UMRCC 1953) are available. 
*Etheostoma caeruleum Storer.—A recent record of 
the rainbow darter in pool 25 is probably based on a 
straggler from a small tributary. 
Etheostoma chlorosomum (Hay).—The bluntnose 
darter appears to have a northern disjunct population 
in pools 8 and 9 (UMRCC 1953), but it seems to be 
accidental in pool B-26. 
*Etheostoma exile (Girard).—The Iowa darter is 
represented by published records for pools 5, th ae 
(UMRCC 1953), and 9 (Nord 1967). 
*Etheostoma flabellare Rafinesque.— The fantail 
darter is probably accidental in the Mississippi River. 
Supplemental records for pools 4 and 10 (UMRCC 
1953) are available. 
Etheostoma nigrum Rafinesque——The johnny darter 
is widely distributed but rather uncommon. Supple- 
mental records are as follows: pools 5 (UMRCC 1967), 
6, 9, and 11 (UMRCC 1953). 
*Etheostoma spectabile (Agassiz) —The orangethroat 
darter, recently taken in pool 25 and at river mile 43, 
is probably accidental in the river. 
*Etheostoma zonale (Cope).—The banded darter, 
recorded from pools 9-11 (Nord 1967), is probably ac- 
cidental in the river. 
Perca flavescens (Mitchill)—The yellow perch is 
generally distributed above pool 19 and locally common. 
Supplemental records are available for pools 5 (UMRCC 
1964), 8-11 (UMRCC 1960), 15-17 (UMRCC 1958), 
and 22 (Nord 1967). 
Percina caprodes (Rafinesque)—The logperch is 
widely distributed and rather common in the upper 
pools. Supplemental records for pools 5 (UMRCC 
1967), 6, and 11 (UMRCC 1953) are available. 
*Percina maculata (Girard).—The blackside darter 
is probably accidental in the river. Supplemental rec- 
ords for pools 4, 5, 8, 9 (UMRCC 1953), and 10 (Becker 
1966) are available. 
Percina phoxocephala (Nelson).—The slenderhead 
darter is widely distributed but rare. Supplemental rec- 
ords for pools 4, 6, 7, 9, and 11 (UMRCC 1953) are 
available. 
*Percina sciera (Swain) —The dusky darter is repre- 
sented by a 1963 collection from river mile 43, but this 
species is accidental in the river. 
Percina shumardi (Girard).—The river darter is 
widely distributed, and it is common above the mouth 
of the Missouri River. Supplemental records for pools 
5-10 (UMRCC 1953) are available. 
Stizostedion canadense (Smith).—The sauger, wide- 
ly distributed and common throughout most of the river, 
is especially common below the mouth of the Missouri 
River. Supplemental records are available for pools 5 
(UMRCC 1967), 13 (Nord 1967), and 26 (Rock 1963). 
Stizostedion vitreum (Mitchill).— The walleye is 
widely distributed, but it is distinctly less common be- 
low pool 20 than it is above that pool. Supplemental 
records are as follows: pools 5 (UMRCC 1967), 6 
(UMRCC 1953), 17, 19 (UMRCC 1960), 115515, 16 
(Barnickol & Starrett 1951), 24, 25 (Nord 1967), and 
26 (Rock 1963). 
Aplodinotus grunniens Rafinesque—-The freshwater 
drum is common throughout the river and is particu- 
larly abundant below the mouth of the Missouri River. 
A supplemental record for pool 5 (UMRCC 1963) is 
available. 
*Cottus carolinae (Gill) —-The banded sculpin, taken 
in 1963 at river mile 70, is accidental in the river. 
PROBLEMATIC AND ERRONEOUSLY 
REPORTED SPECIES 
The following species, included in Bailey’s prelimi- 
nary list (UMRCC 1952) because most of them are 
known to occur in the lower reaches of tributary streams, 
have not been taken in the Mississippi River: spotted 
gar, Lepisosteus oculatus; brown trout, Salmo trutta, 
muskellunge, Esox masquinongy; redfin shiner, Notropi: 
umbratilis; blacknose dace, Rhinichthys atratulus; long. 
nose dace, Rhinichthys cataractae ; river redhorse, Moxo: 
stoma carinatum; spotted sunfish, Lepomis punctatus 
bantam sunfish, Lepomis symmetricus; and slough darter 
Etheostoma gracile. 
The report of the spotted gar in the “Mississipp 
River system of Illinois’ (Hubbs & Lagler 1941:26) 
evidently referred merely to the drainage, and a speci 
men recorded from pool 19 (Anonymous 1962), mad 
available to us through the courtesy of Dr. Kenneth D 
Carlander of Iowa State University, is reidentified as ar 
aberrant specimen of the shortnose gar. 
The brown trout is, as Bailey suggested, likely to br 
found eventually as a straggler in the river. 
The muskellunge, reported from pools 10, 17 (Nor 
1967), and 9 (Greene 1935) but presumably based or 
old records, probably does not now occur in the river 
The redfin shiner, blacknose dace, and longnose dac 
are abundant in a number of tributaries, and it is sur 
prising that recent specimens of these species have no 
been represented among the many thousands of min 
nows we have examined from the Mississippi River. 
The river redhorse occurs in Lake St. Croix (Phillip 
& Underhill 1967:177), and it will probably be foun 
eventually in the Mississippi River. 
The spotted and bantam sunfishes have become s 
rare in the northern parts of their ranges that they ar 
no longer probable additions to the Mississippi Rive 
fauna. 
The slough darter is common in many tributaries an 
adjacent swamps in southern Illinois but has not bee 
taken in the river proper. 
The cisco, Coregonus artedii, was reported from poc 
8 (UMRCC 1953). Details are now lacking, but what 
ever the provenance of the specimen, if indeed it wa 
correctly identified, the cisco does not occur naturall 
in the Mississippi River. 
The cypress minnow, Hybognathus hayi, was ¥ 
ported from three sites below the mouth of the Mi 
souri River (Smith 1965:7), but the specimens are her 
reidentified as juveniles of H. nuchalts. 
THE CONTRIBUTIONS OF TRIBUTARIES 
Of the 134 species recorded here, 30 probably repr 
sent stragglers that are accidental in the Mississippi Rive 
Salmo gairdneri evidently came from trout-stream tribt 
taries, and the following eight species probably cam 
