FISHES OF THE MISSOURI RIVER BASIN. 395 



fEvermann 1893); Poplar River. Poplar, Mont. (Eigenmann, 1894) ; Floyd 

 RJver, Lemurs, Iowa, and Bine River, Crete, Nebr. (as M. macrolepidoUun 

 duquesnei, Meek, 1894) ; Dakota River at Jamestown (Woolnian 1896). 



Many good-sized examples were obtained in 1892 at Belle Fourcbe from 

 the Reclwater and the Belle Fonrche. The collection of 1893 contains speci- 

 mens from the following places: Dakota River, Mitchell; Emanuel Creek 

 Springfield: Choteau Creek, Springfield; Crow Creek, Chamberlain; canal 

 a! Niobrara ; Verdigris Creek, Verdigris ; Elkhorn River, Norfolk Junction ; 

 Elkhorn River, Ewing ; South Loup River, Ravenna ; Long Pane Creek Long 

 Pine ; Niobrara River, Long Pine ; North Platte R.ver, Douglas ; North Platte 

 River, Casper; Deer Creek, Glenrock; Clear Creek, Clermont. There is but 

 little variation among the specimens from different localit.es either m num- 

 ber of fin ravs, size of scales, or proportion of parts. The «f"™*™ ™**J 

 specimens counted, 6 or 7-42 to 45-4 or 5. D. 12 or 13; head 4* to 4f ; depth 

 3« to 4 In large specimens the upper caudal lobe is the longer. This species 

 is of sufficient size and abundance to make it of considerable value as a food 



35 Placophar^L r duquesnii(Le Sueur). Big-jawed Sucker. Floyd River at Sioux 



Citv and Lemars, Iowa (as P. carinatus, Meek, 1894). 



36 Campostoma anomalum (Rafinesque). Stone-roller Platte River at Fort 



Kearney (as C. M W o P s type, Cope, 1864 and 1865) ; Alma, Wabaunsee County, 

 Kans.; Kansas River, Topeka; Ellis, Ellis County, Kans. (Gilbert 1884), 

 Blackwater Creek, Brownsville, Mo. ; Flat Creek, Sedalia, Mo. ; Grand River, 

 Clinton Mo.; Tabo Creek, Calhoun, Mo. (Jordan & Meek, 1885); common 

 in small streams in Kansas (Graham, 1885) ; Shunganunga Creek and Kansas 

 River at Topeka; Ward Creek, Shawnee County, Kans ; Alma and Ellis, 

 Kans (Gilbert, 1885); Kansas River, Shunganunga, Mill, and Wild Cat 

 creeks, and Ellis (Cragin, 1885a) ; Blacksmith Creek, Shawnee County, Kans. 

 (Gilbert, 1886) ; Solomon River, Beloit, Kans. ; north fork of Solomon River, 

 Lenora, Kans. ; Saline River, Wakeeney, Kans. ; Smoky Hill River, Wallace, 

 Kans (Hay 1887); Middle Beaver Creek and Spring branch of Spring Creek, 

 Smith County, Kans. (Gilbert, 1889); Jones Creek, Dixon Mo ; Big Piney 

 River, Cabool, Mo.; Osage Fork, Marshfield, Mo.; Lock .Fork, Mansfield, 

 Mo. ; Marais River, Dixon, Mo. ; Niangua River, Marshfield, Mo ; Sac River, 

 Springfield, Mo. (Meek, 1891); Floyd River, Sioux City, Iowa (Meek, 1894); 

 Dakota River at Jamestown (Woolman, 1896). 



Obtained bv us as follows: Floyd River, Sioux City; Emanuel Creek- 

 Springfield; Enemy Creek, Mitchell; Prairie Creek, Scotland; Firesteel 

 Creek! Mitchell; Crow Creek, Chamberlain; Wood Creek, Grand Island; 

 Chadron Creek, Chadron; Deer Creek, Glenrock. Not found manyof the 

 streams in or about the Black Hills; nor was it found in any of the streams 

 that are strongly alkaline in character. The largest specimens are those 

 from Chadron, some of which are about 5 inches long. No differences 

 between these and eastern specimens are apparent. Head 4-, ; depth 1 , ; c> e 

 54- snout 2*: D. 8; A. 7; scales 8-52-7. The black band in the dorsal and 

 an'al fins distinct in males; those from Glenrock paler. Glenrock, Wyo., is 

 the most western point from which this fish is known. 

 37 Chrosomus erythrogaster Rafinesque. Eed-bellied Dace. Marais des Cygnes, 

 Kans (Grabam. 1885); north fork of Solomon River, Lenora, Kans. (Hay, 

 1887); Jones Creek, Dixon, Mo.; Big Piney River, Cabool, Mo. ; Osage Fork, 

 Marshfield, Mo.; Marais River, Dixon, Mo.; Niangua River, Marshfield, 

 Mo. ; Sac River, Springfield, Mo. (Meek, 1891). 

 38. Chrosomus dakotensis sp. nov. Typo locality: Crow Creek Chamberlain, 

 S. Dak., where 11 specimens were collected June 22, 1893. (Type, No. 4o680, 

 U. S.Nat. Mus.) 



