46 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
10. Leuciscus atrarius (Girard). (PI. xx.) 
Siboma atraria Girard, Proc. Acad. Nat. Sci. Phila. 1856, 208; P. R. R. Survey, x, 297, 1858 
(spring in Utah); Cope, Zool. Wheeler Survey, v, 667, 1875. 
Squalius atrarius, Jordan and Gilbert, Proc. U. S. Nat. Mus. 1880, 461 (Utah Lake); Syn- 
opsis, 241, 1882. 
Leuciscus atrarius, Jordan, Bull. U. S. Fish Com., ix, 48, 1891 (Heart Lake and Witch Creek, 
Yellowstone Park). 
Tigoma obesa Girard, Proc. Acad. Nat. Sci. Phila. 1856, 206; P. R. R. Survey, x, 290, 1858 (Salt 
Lake Valley, Utah). 
Squalius obesus, Jordan and Gilbert, Synopsis, 237, 1882. 
Tigoma squamata Gill, Proc. Bost. Soc. Nat. Hist. 1861; Ichthyol. Capt. Simpson’s Expl., 405, 
1876. 
Squalius squamatus, Jordan & Gilbert, Synopsis, 241, 1882. 
Squalius cruoreus Jordan and Gilbert, Proc. U. S. Nat. Mus. 1880, 460 (Utah Lake; young 
specimens). 
Squalius rliomaleus Jordan and Gilbert, Proc. U. S. Nat. Mus. 1880, 461 (large specimens from 
Utah Lake) ; Synopsis, 240, 1882. 
Siboma atraria longiceps Cope, Zool. Wheeler Survey, v., 667, 1875. 
This species is represented in the collection by nine large specimens taken with 
the hook in Jackson Lake, and by numerous smaller specimens from the small creek at 
the head of Jackson Lake, and from Snake River at President Camp. It is very 
abundant in Jackson Lake and takes the hook readily. 
Measurements of nine specimens. 
No. 
Length 
in 
inches. 
Head 
in 
length. 
Depth 
in 
length. 
Eye in 
head. 
Snout 
in 
head. 
27 
n 
31 
4 
6 
44 
28 
12 
3£- 
4 
6— 
31 
29 
11 
4 
31 
6 
4 
30 
10i 
4 
4+ 
6- 
4 
31 
9 
4 
4+ 
51 
4 
32 
11 
4 
4 
6 
31 
33 
13 
4 
4+ 
6 
31 
34 
12 
4 
4+ 
6- 
31 
35 
11 
4 
34 
6 
31 
Scales, 11 to 13-56 to 63-6 or 7 ; 12-63-7 being the most usual number. 
Teeth, oftener 2, 5-4, 1 than 2, 5-4, 2. 
I have compared these specimens with those collected by Dr. Jordan in Heart Lake 
and find them identical. Girard’s type of Siboma atraria , a specimen 6£ inches long, 
from “ near 38° latitude, in Utah,” agrees well with these, as do also others collected 
at Willow Springs, Utah, by Dr. G. K. Gilbert, and those called S. rliomaleus by Jordan 
and Gilbert. Specimens in the National Museum, labeled Squalius squamatus Gill, from 
Utah, are evidently atrarius. An examination of the type of Squalius cruoreus J. and G 
shows it to be a little more slender than other examples of atrarius , but it differs in no 
other partierdar. Specimens in the Museum collected in Beaver River, Utah, by 
Henshaw and Yarrow, and called Squalius egregius Cope, cannot be distinguished from 
atrarius , and that species should probably go in the above synonymy. 
The type of Girard’s Cheonda ecerulea, from Lost River, Oregon, is a very different- 
looking fish. The head is longer, the snout much longer and more pointed, the mouth 
is larger, the maxillary is longer and less oblique, the eye is somewhat larger, and the 
top of the head more flat. 
