FISHES OF THE ROCKY MOUNTAIN REGION Wye 
OrpER APODES (The Eels) 
Famity Anguillide 
The common eel, Anguilla chrysypa Raf., is found in the Rio Grande. Girard 
separated the Rio Grande fish as a distinct species, A. tyrannus, but Jordan and Ever- 
mann treat it as a synonym. 
OrvER ISOSPONDYLI 
é Famity Chirocentride 
Portheus thaumas Cope, is from the Niobrara Cretaceous of Kansas, and perhaps of 
Colorado. 
Famity Hiodontide (The Moon-Eyes) 
Body oblong, much compressed, covered with brilliantly silvery scales. The moon- 
eye, Hiodon alosoides (Raf.), and the toothed herring, H. tergisus Le Sueur, have been 
found in Montana (Henshall). H. alosoides has the dorsal with 9 developed rays, H. 
tergisus has it with 12. 
Fairy Clupeide (The Herrings) 
Six species occur in the Green River shales of Wyoming. ‘These are Diplowstes 
analis Cope, D. dentatus Cope, D. pectorosus Cope, D. theta Cope, Knightia alta (Leidy), 
K. eocena Jordan. The last is Clupea humilis Leidy, and C. pusilla Cope, both names 
preoccupied. Dr. Jordan justly objects to Dr. Dollo’s proposal to rename Diplomystus 
Cope, calling it Copeichthys Dollo. 
The genera of Green R. Clupeids are thus separated: 
Dorsal scutes transverse, with pectinate borders, a median tooth especially prominent 
Diplomystus Cope. 
Dorsal scutes not wider than 5 dia with only a single median tooth, at the end of a longi- 
tudinal carina. . . Werte Knightia Jordan. 
The scales of Knightia are aaron eaves isa dices of Desire about 35 in lateral 
line (over 60 in Diplomystus). (See Jordan, Univ. of Calif. Publ., Geology, Vol. V, No. 7, 
p- 136.) 
The Museum of the University of Colorado contains good material of D. analis. 
There is also a well-preserved example of Knightia eocena. 
Famity Salmonide (Salmon and Trout) 
Jaws toothiess\or gicarly so; scalesilarge 1. 66 (yo) ey “xeciyel onl, ret nae | at ie) Ue 
Dentition strong and complete . . . 3: 
1. Olivaceous above, sides white, but not ieee cli pate 9 + Gupeennceds in Flathead 
Lake, Montana) . . . . . . Coregonus clupeiformis (Mitchill) (Whitefish). 
Bluish above, sides silvery . . Bai aki eats Owes abo 
2. Scales in lateral line 83 to 87; feaeek ont a fon (Great Basin and Pacific Slope, 
reaching Montana). . . . . . * . . « Coregonus williamsoné Girard. 
(Williamson Whitefish). 
Scales in lateral line go; slenderer than the last, with lower fins. (Upper Missouri 
Basinin Montana) . . ate ie Coregonus cismontanus (Jordan). 
Henshall gives only ertaenare oe Montana, calling it the Rocky Mountain White- 
fish. However, Coregonus couesii Milner, which Jordan and Evermann refer to wil- 
liamsoni, was from Chief Mountain Lake, Montana. 
