28 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
back and below, although the number in the lateral line is about the same as in O. 
rohusta. Scales along middle line of back before dorsal obsolete or nearly so ; mouth 
a little larger than in Gila rohusta. Least depth of caudal peduncle, If in maxillary 
(1:| in O. rohusta). Gila emoryi Baird & Girard seems to be the young of G. elegans. 
7. Ptyclioclieilus lucius Girard. White Salmon. 
This species is generally common, specimens havingbeen taken by us in the Gun- 
nison Biver at Delta, in the Uncompahgre and in Green liiver. It reaches a weight 
of 80 pounds or more in the large streams, and is Justly regarded as a good food-fish. 
The young have always a black caudal spot, the fins are slightly reddish, and 
there is a slight trace of a i^ale lateral band below a darker one. 
The scales are about 87 instead of 104 as shown in Girard’s figure. Maxillary 2| 
in head. 
8. Agosia yarrowi Jordan & Evermanu, sp. nov., Minnow. {Apocope oscuJa Cope and Yarrow; not 
Aryyreus osculus Girard). 
This species is very abundant in the small streams in the mountain meadows. In 
the larger streams it is less common, and in the rivers below the mountains it is rare. 
^Our specimens are from Tomichi Creek, Gunnison Eiver at Gunnison and at Delta, 
Uncompahgre River, Green Eiver, Eagle River at Gypsum, Rio de las Animas Perdi- 
das, Rio Florida, and Leitner’s Creek. 
Descrii)tion from specimens from Tomichi Creek. Head 4^ in length ; depth 5 to 5^- ; 
D. 7 ; A. 7 ; scales 74, 80, 77, 80, 83, 80, 83, 79, 75, 76, 74, 74, 80, 82, in 14 specimens, 
the average being about 16-80-13. Length from 2 to 5 inches. 
Body little compressed, elongate; headlong and rather heavy, bluntish ; snout 
short, obtuse, 2§ to 2| in head ; eye small, 5J to 6 ; barbel small but distinct. Up- 
per lip, ill about half the specimens, separated from the skin of the snout by a fold, 
as usual in Agosia and most other Cyprinidce. In the rest of the typical examples the 
upper lip is joined mesially to the snout by a distinct frenum. These specimens, 
although to all appearance specifically identical with the others, would belong to the 
genus lihinichthys , as now defined. The frenum is, however, considerably narrower 
than in Rhinichthys, and this fact may for the present serve to separate the species 
from that genus. Lips full ; maxillary about 3J in head ; scales small ; lateral line 
complete ; dorsal fin well backward, its insertion about midway between base of cau- 
dal and eye. Pectoral 1^- in head, usually not quite reaching to ventrals, the latter 
reaching past vent. Caudal large. Color dark olive, more or less mottled above with 
black ; sides with two ill-defined dark lateral bands, the interspace paler. Axils of 
fins mostly crimson in life as in related species. This species seems to differ from A. 
nuhila and A. adoheiw its smaller scales, these species having less than 70. Its scales 
are larger than in Agosia oscula. 
In the type of Argyreus osculus., from Rio Babocomori, in Arizona, there are 90 
scales. In the types of Apocope ventricosa Cope, from “Arizona and DIew Mexico,” 
there are 89. We have therefore been compelled to regard our specimen as different 
from the original Argyreus osculus =ventricosa. 
We have named this species for our friend. Dr. Henry C. Yarrow, in recognition 
of his work on the fishes of the Rio Colorado. 
9. Salrao mykiss Walbaum (var. pleuriticiis Cope). 
Trapper’s Lake, Eagle River, Canon Creek, Sweetwater Lakes, Gunnison River, 
Rio Florida. 
