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BULLETIN OF THE UNITED STATES FISH COMMISSION. 
II.— THE BIG SIOUX RIVER. 
The Big Sioux River, at Sioux Falls, South Dakota, has a very rocky bed above 
the falls, while below the falls the bottom is both muddy and rocky. At Sioux City 
the river is much larger and has a very muddy bottom. A short distance above its 
mouth it widens into a sort of lake. There is some timber along the shores and con- 
siderable vegetation in the lake. Our collections were made below the falls, at Sioux 
Falls, in July, 1889, and near the mouth of the river, in the neighborhood of Sioux City, 
in August, 1890. 
FISHES OF THE BIG SIOUX RIVER. 
1. Ictalurus punctatus (Rafinesque). Channel cat, White cat ; Silver eat. Sioux City, common. 
2. Noturus flavus (Rafinesque). Stone cat. Sioux Falls, one specimen. Dorsal rays, 14 ; pectoral 
spine with retrorse serrae in front, grooved behind ; head, 3f j depth, 6. Sioux City, rare. 
3. Noturus gyrinus (Mitchill). Stone cat. One specimen; anal, 14; body short; adipose fin con- 
tinuous with caudal; posterior part of adipose fin raylike; head, 3^; depth, 4; pectoral 
spine entire. 
4. Catostomus teres (Mitchill). Common sucker . Sioux City, common. 
5. Carpiodes velifer (Rafinesque). Quillback; Carp sucker. Sioux City, common. 
6. Moxostoma duquesnei (Le Sueur). Common redhorse ; Mullet. Sioux Falls, rare; Sioux City, 
common. 
7. Hybognathus nuchalis Agassiz. Silvery minnow. Sioux City, rare. 
8. Pimephales notatus (Rafinesque). Blunt-nosed minnow. Sioux Falls, common ; Sioux City, rare. 
9. Notropis cayuga Meek. Sioux City, rare. 
10. Notropis deliciosus (Girard). Abundant. 
11. Notropis topeka Gilbert. Sioux City, rare. 
12. Notropis hudsonius (DeWitt Clinton). Sioux City, common. 
13. Notropis whipplei (Girard). Sioux City, rare. 
14. Notropis atherinoides Rafinesque. Rosy minnow. Sioux City, rare. 
15. Notropis megalops (Rafinesque). Common shiner. Six specimens obtained. 
16. Notropis dilectus (Girard). Emerald minnow. Sioux Falls, common. 
17. Hybopsis kentuckiensis (Rafinesque). Hornyhead. Sioux Falls, common. 
18. Notemigonus chrysoleucus (Mitchill). Golden shiner; Bream; Roach. Sioux City, rare. 
19. Hiodon alosoides (Rafinesque). Moon-eye; Toothed herring. Sioux City, rare. 
20. Dorosoma cepedianum (Le Sueur). Gizzard shad; Hickory shad; Mud shad. Sioux City, abundant. 
21. Fundulus zebrinus Jordan and Gilbert. Sioux City, rare. 
22. Percopsis guttatus Agassiz. Trout perch. Sioux City, rare. 
23. Ambloplites rupestris (Rafinesque); Rock l tass; Red-eye; Goggle-eye. Sioux Falls, rare; Sioux 
City, common. 
24. Lepomis cyanellus (Rafinesque). Green sunfish. Sioux Falls, common ; Sioux City, abundant. 
25. Lepomis humilis (Girard). Red-spotted sunfish. Sioux Falls; Sioux City. Palatine teeth well 
developed; scales, 35; opercular flap long and surrounded by a red margin. Abundant. 
26. Etheostoma nigrum Rafinesque. Johnny darter. Sioux City, common; Sioux Falls, abundant. 
27. Etheostoma zonale (Cope). Sioux City, rare. 
28. Etheostoma aspro (Cope and Jordan). Black-sided darter. Two specimens obtained. 
29. Perea flavescens (Mitchill). Yellow perch. Sioux Falls, rare ; Sioux City, common. 
30. Stizostedion vitreum (Mitchill). Wall-eyed pike; Jack salmon; Pike. Rare. 
31. Stizostedion canadense (C. H. Smith). Pike; Sand pike. Common. 
32. Roccus chrysops (Rafinesque). White bass. Sioux City, common. 
33. Aplodinotus grunniens Rafinesque. Fresh-water drum. Sioux City, common. 
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