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BULLETIN OF THE UNITED STATES FISH COMMISSION. 
FISHES OF THE IOWA RIVER. 
1. Ammoccetes branchialis (Linnaeus). Mud lamprey. A few specimens are contained in the 
Museum of the Iowa State University. 
2. Petromyzon concolor (Kirtland). Brook lamprey. A few specimens in the museum of the Iowa 
State University. 
3. Amia calva Linnaeus. Dogfish; Bow-fin; Mudfish. Iowa City and Amana, not common. 
4. Lepisosteus osseus (Linnaeus). Common gar-pike; Long-nosed gar; Bill-fish. Iowa City; said to 
he quite common in the spring. The specimens examined are in the museum of the Iowa 
State University. 
5. Polyodon spathula (Walbaum). Paddle-fish; Spoon-Mil; Duck-hilled vat. The specimens examined 
are in the museum of the Iowa State University. Said to have been frequently taken in pre- 
vious years. 
6. Ictalurus punctatus (Eafinesque). Channel cat; White cat; Silver cat. Small specimens were 
obtained in considerable numbers at Amana and Iowa City. Larger specimens are said to 
be more rare than formerly. 
7. Ameiurus melas (Eafinesque). Bullhead. Garner and Belmond, commou. 
8. Noturus gyrinus (Mitchill). Stone cat. Belmond and Amana, rare. All the specimens taken 
were small. 
9. Carpiodes velifer (Eafinesque). Quillback; Carp sucker. Iowa City and Amana, very abundant 
in bayous at the side of the river. The specimens exhibit considerable variations. In some 
the first dorsal rays are prolonged to near the caudal fin, while in others these rays scarcely 
reach the middle of the dorsal fin. Some are deeper than others, and in all the profile is 
quite trenchant. 
10. Catostomus teres (Mitchill). Common sucker. Belmond, Amana, and Iowa City, not common. 
11. Catostomus nigricans (Le Sueur). Sog sucker; Stone-roller; Hog mullet. Belmond, abundant 
just below the dam. 
12. Moxostoma duquesnei Le Sueur. Common redhorse; “Mullet.” Belmond and Iowa City, com- 
mon; Amana, rare. 
13. Minytrema melanops (Eafinesque). Striped sucker. One specimen was obtained at Amana. 
This species seems rare in Iowa, and I have taken it in only three localities. 
14. Campostoma anomalum (Eafinesque). Stone-lugger ; Stone-roller. Iowa City and Amana, rare ; 
Belmond, common. Scales, 44 to 48. 
15. Chrosomus erythrogaster Eafinesque. Bed-bellied minnow. Belmond, abundant. 
16. Hybognathus nuclialis Agassiz. Silvery minnow. Amana, rare. 
17. Hybognathus nubila (Forbes). Belmond, abundant. 
18. Pimephales notatus (Eafinesque). Blunt-nosed minnow. Amana, very common; Iowa City and 
Belmond, rare. 
19. Cliola vigilax (Baird and Girard). Silver-fin. Iowa City, rare. 
20. Notropis heterodon (Cope). Bare. 
21. Notropis cayuga Meek. Belmond, common; the specimens taken at this place agree with those 
from the Cedar Basin and elsewhere in the State. 
22. Notropis deliciosus (Girard). Iowa City and Amana, not common. 
23. Notropis topeka Gilbert. Amana, rare. 
24. Notropis gilberti Jordan and Meek. Iowa City and Belmond, abundant; Amana, rare. 
25. Notropis whipplei (Girard). Amana, very common; Iowa City, not common. 
26. Notropis megalops (Eafinesque). Shiner. Belmond and Iowa City, very common ; scales before 
the dorsal fin, small. 
27. Notropis ardens (Cope). Bedfin. Belmond, rare. Scales, 43; anal rays, 11; color, dark blue; 
dark spot at the base of first dorsal ray prominent ; base of first dorsal ray midway between 
the nostril and base of caudal fin. 
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