FISHES OF THE MISSOURI RIVER BASIN. 421 



125. Hypohomus nianguae (Gilbert & Meek). Niangua River, Marshfield, Mo. 



(Meek, 1891). 



126. Cottogaster uranidea (Jordan & Gilbert). Little Piney River and Gasconade 



River, Arlington, Mo. (Meek, 1891). 



127. Diplesion blennioides (Rafinesque). Wild Cat Creek, Manhattan, Kans- 



(Graham, 1885); Lock Fork, Mansfield, Mo. ; Osage Fork, Marshfield, Mo. ; 

 Little Piney River at NeAvburg and Arlington, Mo.; Gasconade River, 

 Arlington, Mo.; Marais River, Dixon, Mo.; Sac River, Springfield, Mo. 

 (Meek, 1891). 



128. Boleosoma nigrum Rafinesque. Johnny Darter. Platte River near Fort Kear- 



ney, Nebr. (as PceciKchthys mcsivus type, Cope, 1864 and 1865; tliis second 

 reference is by error made to Fort Riley, Kans.); Tabo Creek, Lafayette 

 County, Mo. (as Poecilichthys beani type, Jordan, 1884); Hundred and Two 

 River at Bedford, Iowa, and Maryville, Mo. ; Blactwater Creek, Browns- 

 ville, Saline County, Mo. ; Flat Creek, Sedalia, Mo. ; Grand River, Clinton, 

 Mo.; Tabo Creek, Calhoun, Mo. (as Boleosoma olmstedi maculatum, Jordan 

 & Meek, 1885); Kansas River (as B. olmstedi maculatum, Graham, 1885); 

 Shunganunga Creek and Blacksmith Creek, Shawnee County, Kans. (as B. 

 olmstedi maculatum, Gilbert, 1886); Big Creek, Texas County, Mo., and Bear 

 Creek, Boone County, Mo. (as B. olmstedi ozarcanum, Call, 1887); Solomon 

 River, Boloit, Kans. ; north fork of Solomon River, Lenora, Kans. ; Saline 

 River, Wakeeney, Kans. (as B. olmstedi, Hay, 1887); Sappa Creek, Oberlin, 

 Kans. (as Etheostoma olmstedi maculatum, Gilbert, 1889) ; Marais River, Dixon, 

 Mo. ; Niangua River, Marshfield, Mo. ; Lock Fork, Mansfield, Mo. (Meek, 

 1891); South Platte River, Denver (Jordan, 1891); Big Sioux River at 

 Sioux City and Sioux Falls; Silver Lake, Iowa, and Boyer River at Arion, 

 Iowa (Meek, 1892); Platte and Elkhorn rivers at Fremont; State fish com- 

 mission ponds at South Bend, Nebr. ; Spirit and East Okoboji lakes; Floyd 

 River at Lemars and Sioux City; Elkhorn River at Fremont (Meek, 1894) ; 

 Dakota River at Jamestown (Woolman, 1896). 



Much less common than B. iowce. We found it only at the following places : 

 Enemy and Rock creeks, Mitchell; Norfolk Creek, Norfolk Junction, and 

 Elkhorn River, Ewing. The total number of specimens obtained is 66, the 

 majority being from Norfolk Junction and Ewing. They do not differ appre- 

 ciably from more eastern examples, as the following description of specimens 

 from Rock Creek shows: Head 3f; depth 6.V; eye 4; snout 4. D. viii or 

 ix-11 to 13; A. i, 7 or 8. Scales 6-46 to 50-6 or 7. Body slender, fusiform; 

 head short; snout blunt aud decurved, tho upper lip below level of lower 

 edge of orbit; maxillaries protractile; gill membranes scarcely connected. 

 Eyes high up, tho interorbital width narrow, l.V in eye. Cheeks and breast 

 naked; opercles with a few scales; nape mostly scaled ; lateral line nearly 

 straight and usually complete, an occasional scale, especially in posterior 

 portion, without pore; ventral lino with ordinary scales. Opercular spine 

 woll developed; no black humeral scale. Colors as in typical nigrum. 



129. Etheostoma zonale (Cope). Big Sioux River at Sioux City (Meek, 1892). 



130. Etheostoma iowae Jordan & Meek. This is by far tho most abundant and 



widely distributed darter in this region. It was found by us in the following 

 localities: Crow Creek, Chamberlain; Enemy and Rock creeks, Mitchell; 

 Emanuel and Choteau creeks, Springfield; Prairie Creek, Scotland; Creighton 

 Creek, Niobrara ; pond at Creighton ; Minnechaduza Creek, Valentine; pond 

 at Verdigris; Elkhorn River, Norfolk Junction; ponds at Long Pine, and in 

 the State fish commission ponds at South Bend. At most of these places wo 

 found it to bo abundant, the collections containing not fewer than 350 

 excellent specimens. It is also an abundant species in tho Dakota River at 

 Jamestown (Woolman, IS96). This species is preeminently an inhabitant of 

 small lakes, ponds, isolated overilow pools along river courses, and of the slug- 



