S2 
BULLETIN OP THE UNITED STATES FISH COMMISSION. 
length ; the specimens all slender, with short small head, corresponding to P. platy- 
rliynclms of Cope. 
5. Rhinichthys dulcis liiteus (Garman). P.,J. 
Abundant in the Jordan and Provo with the preceding. It is possible that some 
of the species of Apocope of Cope were based on this, which is certainly the commonest 
species of tliis type about Provo. Some of the specimens recorded by me as Apocope 
vulnerata (Proc. U. S. Nat. Mus., 1880, 402) belong to it, as I find on re-examination. 
The Utah fish is almost or quite identical with the ordinary dulcis^ but the number of 
scales below the lateral line seems on an average to be slightly greater (usually about 
14 above veutrals, while dulcis has 11 or 12). 
6. Agosia nubila (Girard). P. 
Bather scarce, and seen only at Provo. These specimens seem to agree fully with 
those taken in Heart Lake, in the Yellowstone Park. Body robust; head blunt and 
short ; the snout 3 in head, little projecting beyond the mouth. Head 4i in length ; 
depth, 5. Eye 4§ in head; pectoral rather short, not reaching ventrals. Scales, 72; 05 
in two specimens. This species seems to correspond to Apocope carringtoni, vulnerata 
and rhiniclitlvyoides of Cope, and the Ai^ocope henshavii and couesi are not evidently 
ditlerent. The species of this genus are distinguished with great difficulty. The fol- 
lowing analysis gives the chief characters which I am able to find. This arrangement - 
is j)rovisional only, and further study may reduce the number of recognizable forms, 
a. Scales very small, abont 90; snout obtuse, little projecting. Gila River and Lower Colorado Basin. 
{■mtaJnUs = veiitricosa) Oscula. 
aa. Scales small, about 80; suout blunt and heavy, to 3f in head ; upper lij) often joined to the 
snout by a narrow mesial frenum; eye small. Upper Colorado Basin. {9 oscula Cope «& 
Yarrow, not Girard) Yarrom. 
aaa. Scales moderate, 00 to 70. 
6. Hoad short, blunt, and heavy, 4 to 4^ in length ; snout short, high, obtuse, 3|- to 3^ in head, ita 
tip scarcely projecting beyond mouth ; eye large, about 4|- iu head, more than half suout; 
lateral line broken in the young. Great Basin and Upper Columbia River. {Carringtoni—- 
vulnerata = rhinicMliyoides. = ? henshavii = fcouesi) Nuhila, 
hi). Head long, 3f to 3§- in length, with long, rather low, broad snout, pointed iu profile, 2|- to 2| 
in head; eye small, 5 to 6 in head; little more than half snout, lateral line complete. Se- 
vier River Adobe. 
7. Leuciscus montanus (Cope).' Silver-side Minnow. P.,J. 
(Clinostomus montanus and C. tcenia Cope; fFhoxiims clevelandi Eigenmann & Eigenmann.) 
This is the most abundant fish in the Provo Eiver above the city of Provo. It 
reaches a length of about 4 inches, and is useful as food for the trout. In form, color, 
size, and habits, this fish bears a strong analogy to Afotropis coccogenis of the Alle- 
ghany region. I can not separate L. Ucnia from L. montanus. The anal rays vary from 
10 to 13, the usual number being 10 or 11. Dr. Gilbert has examined the types of 
both species and finds no ditference. Phoxinus clevelandi Eigenmann &, Eigenmann 
(West. Amer. Scient., Nov., 1889, 149), from Napa Springs, California, agrees per- 
fectly with L. montanus, but the locality is remote. In life, L. montanus is greenish ^ 
blue below the eye ; a red band below lateral line, ceasing at front of anal. Dark lat- 
eral band almost blue. 
8. Leuciscus copei Jordan & Gilbert. Leather-side Minnow. P. {Squalius alicics Jouy.) 
Abundant in the Upper Provo. There is no difference between Squalius copei from 
Bear River, a tributary of the Great Salt Lake and 8. flh'cta’ described soon after from 
