FISHES OF THE MISSOUKI RIVER BASIN. 413 



88. Hiodon tergisus Le Sueur. Moon-eye. West of Fort Union (as Jfyodon tergisus, 



Suckley, I860); Kansas Fiver uear Fort Riley (as llyodon. tergisus, Cope, 

 1865) ; Judith Fiver and river pools near Battle Creek, S. Dak. (as Hyodon 

 tergisus, Cope, 1879); "common in Kansas" (Graham, 1885); Kansas River 

 at Topcka (Cragin, 1885a). 



89. Dorosomacepedianum(Le Sueur). Hickory Shad ; Mud Shad. Missouri River, 



St. Joseph, Mo. ; Taho Creek, Lexington, Mo. ; Grand River, Clinton, Mo. ; 

 Tabo Creek, Calhoun, Mo. (Jordan & Meek, 1885); "very common" in 

 Kansas (Graham, 1885); Shunganunga and Ward creeks, Kans. (Cragin, 

 1885a) ; Osage River, La Cygne, Kans. (Gilbert, 1889) ; Little Finey River at 

 Newburg and Arlington, Mo. (Meek, 1891) ; Missouri River and Big Sioux 

 River at Sioux City (Meek, 1892) ; Floyd River at Sioux City and Elkhoru 

 River at Fremont (Meek, 1894). 



90. Pomolobus chrysochloris Rafinesque. Skipjack; Blue Herring. "Abundant 



in large streams" in Kansas (Graham, 1885). 



91. Coregonus williamsoni cismontanus Jordan. Rocky Mountain Whitefish. 



Headwaters of the tributaries of the upper Missouri as {€. ivilliamsonii, 

 Cope, 1879) ; Madison, Yellowstone, and Gardiner rivers, and Horsethief 

 Creek, Mont., typos, Jordan, 1891&) ; Red Rock River, Red Rock, Mont. ; 

 Beaverhead River, Dillon, Mont.; junction of Firehole and Gibbon rivers 

 (Evermann, 1892); Missouri River, Craig, Mont. (Eigenniann, 1894). 



Whitefish were found only in Tongue River and Big Goose Creek near 

 Sheridan, 13 small specimens being secured. In Tongue River they arc said 

 to be quite common. This variety of Williamson's whitefish is found in 

 most of the cold streams of the upper Missouri Basin, particularly in the 

 streams about the Yellowstone Park. The differences which are assigned as 

 distinguishing the Missouri River whitefish from Williamson's are scarcely 

 perceptible, if at all. The body is said to bo somewhat more slender and 

 the fins lower. All the young examples in the present collections show the 

 parr marks very distinctly. 



92. Salmo niykiss lewisi (Girard). Cut-throat Trout ; Yellowstone Trout. Falls of 



Missouri River (as Salar lewisi type, Girard, 1858); Falls of Missouri River 

 (as Salmo (Salar) lewisi, Suckley, 1860) ; Yellowstone River, Yellow Creek, 

 Gallatin Fork, and Yellowstone Lake (as Salmo pleuriticus type, Cope, 1872) ; 

 St. Mary River (as S. clarki, Jordan, 1878) ; Yellowstone River at Livings- 

 ton, Mont. ; Gardiner River below tho Falls ; Solution Creek, Riddle Lake ; 

 Canyon Creek and Madison River, Yellowstone National Park (Jordan, 18916) ; 

 Atlantic Creek in Two-Ocean Pass and below the pass; upper Yellowstone 

 River; Meadow Creek in Yellowstone Park; east fork of Gardiner River, 

 and McClellan Crook, Helena, Mont. (Evermann, 1892). 



Two specimens of the black-speckled trout are in the collection from south 

 fork of Tongue River and two from Big Goose Creek near Sheridan. Numer- 

 ous other examples were caught with hook from these streams. In these 

 and in nearly all the streams in this part of Wyoming trout are abundant 

 and afford excellent sport to the angler. Small parties often report catches 

 of 400 to 600 as the result of two or three days' fishing. Upon comparing 

 the specimens from Sheridan with others of the same size from Big Wood 

 River at Galena, Idaho, tho following differences are noted: The Sheridan 

 specimens have the eye a little larger, the snout a little shorter, tho maxillary 

 notably longer and heavier, and the fins all much larger; the height of the 

 dorsal is less than 2 in head and that of the anal is 1| in head. In the Idaho 

 specimens tho dorsal and anal are at least a fourth lower; the pectorals and 

 ventrals are also correspondingly shorter. The Sheridan specimens have 

 smaller scales and differ somewhat in coloration. In both, the back is pro- 

 fusely spotted throughout the entire length, but in tho Sheridan specimens 

 there are but few spots below the lateral line, while those from Idaho are 

 almost as thickly spotted below the lateral line as on the back; in the Sher- 



