FISH-CULTURAL INVESTIGATIONS IN MONTANA AND WYOMING. 
45 
sprinkled over with similar black specks, most numerous above the lateral line; lower 
jaw and branchiostegal membranes with numerous very fine dark specks; lower bor- 
der of orbit dark; dorsal, anal, caudal, and ventral fins with a few fine black points; 
pectorals slightly yellowish green, with few black specks, the outer ray edged with 
black; a yellow blotch at base of pectoral extending forward to gill-opening. 
This species is closely related to Leuciscus montanus (Cope), but differs from it in 
the shorter maxillary, smaller eye, greater width of the interorbital space, the shorter 
head, and the much greater depth. Compared with specimens of L. montanus from 
Utah Lake and Bear Biver, at Evanston, Wyoming, and with specimens of S 'qualms 
tcenia (Cope) from Utah Lake, the snout is much more bluut and the anal fin larger. 
It is also related to Leuciscus hydrophlox (Cope), but the body is much deeper, the 
snout is very much blunter, the lower jaw does not project, and the lateral line is 
considerably more decurved; the dorsal fin in L. hydrophlox is midway between snout 
aud base of caudal fin, while in this species it is placed midway between posterior line 
of head and base of caudal; there is also a difference of one in the number of dorsal 
rays ; the anal fin is very much larger and the number of rays greater than in L. 
hydrophlox , from which it also differs notably in the brilliancy of its coloration. 
In the following table I give measurements of the fourteen specimens: 
Length in 
in<dies. 
Head in 
length. 
Depth in 
length. 
Eye in 
head. 
Snout in 
head. 
Base of anal 
in length. 
Dorsal 
rays. 
Anal rays. 
4-1 
4+ 
34 
4 
4 
54 
9 
14 
41 
4+ 
34 
4- 
4 
6 
10 
15 
41 
41 
31- 
34 
34 
6 
10 
14 
4 
4 
3i 
34 
4 
54 
10 
14 
4 
4 
3| 
34 
4 
54 
10 
14 
4 
4 
3| 
34 
34 
51 
10 
14 
4 
4+ 
3| 
4 
4 
54 
9 
14 
4 
4| 
34 
4 
i 
51 
10 
14 
4 
41 
3 § 
34 
34 
54 
10 
14 
4 
4 
34 
3| 
34 
5 
9 
13 
31 
44 
34- 
34 
3| 
54 
10 
14 
3J 
44 
34 
34 
34 
51 
10 
14 
34 
44 
34 
3i 
34 
5 
9 
13 
3 
4 
34 
34 
34 
54 
11 
16 
One small specimen, If inches in length, from the outlet of Swan Lake, near 
Flathead Lake, seems to belong to this species. Head, 4; depth, 4; eye, 2f, greater 
than snout; the mouth more oblique than in the Browns Gulch specimens; the max- 
illary barely reaching the eye ; body much compressed. 
I may add that I have made a careful comparison of the specimens of Glinostomus 
montanus Cope from Utah Lake and Bear Biver, at Evanston, Wyoming, and those 
called Squalius tcenia (Cope), from Utah Lake, which are in the National Museum, and 
I can not see any differences between them. 
I take pleasure in naming this handsome minnow for Dr. Theodore Gill, whose 
studies have added so much to our knowledge of fishes. 
