EXPLORATIONS IN AVESTERN CANADA, ETC, 
111 
25. Rhinichthys dulcis (Girard ). Swift Current, very abundant; Medicine Hat, few ; Calgary, few; 
origin of dorsal equidistant from nostril and base of middle caudal rays. Banff, common in 
Bow River. One specimen lias very much larger fins than the others, the pectoral quite reach- 
ing the anal. Also in hot sulphur springs, Bautf, very abundant. I’oplar, one sjiecimen. 
Craig, alumdant. 
26. Agosia nubila (Girard). Iilaho Falls, abundiint. 
27. Agosia falcata Eigeumauu & Eigeumanu. Abundant in the Boise River at Caldwell, Idaho; 
two specimens from Um,atilla. In the following description the statements and figures given in 
parentheses refer to J. ni(hUa. Head, 3f-4i (4j--4^) ; dejith, 41-5^ (4-4|); 1). 114 (8^-11^); A. 
94(74-94). Scales, 53-60 (59-67). Teeth, 1, 4-4, 1 oh 2. Elongate, slender, head longer than in 
nubila. Eye much larger than in ))u?u7«, about 14 in snout, 3^-44 in head in larger specimens. 
The he.ad l>eiug longer the proportional numliers do not differ from those of nuhiJa. Scales much 
larger than in unbiln, about 10 above the lateral line (14 in nubila). Dorsal usually inserted 
directly over the origin of the veutrals, tlie fin large, its anterior rays prolonged. Origin of 
dorsal equidistant from base of middle caudal rays and from nares. Caudal deeply forked, the 
lobes acute, 3| to 3* in the length. Anal very obliquely truncate, the anterior rays very higii, 
44-4f (-5-5J) in the length. Ventrals alw.ays more x'osterior in position than in nubila, about 
equidistant from base of middle caudal rays and from nares, their tips extending to or past 
middle of base of anal, 4f-5 (5-6) in the length ( reaching to vent, very rarely to origin of .anal). 
Pectorals not reaching ventrals. A dark band forward from eye; d.ark, lateral band scarcely 
evident; silvery below ; sides and back with numerous, irregular, well-defined blotches. Anal 
and sometimes ventrals with ,a dusky spot ne.ar base in front. Dorsal and caudal faintly 
mottled; crimson siiots on mandible, .axil of ventrals, and .along base of anal. (Plate 6.) 
28. Agosia falcata shuswap Eigeumanu & Eigenmann. This variety seems well est.ablished by 
four specimens from Shushwap Lake at Sicamous. It is not at all improbable, however, 
that iutergradations will lie found. The specimens differ constantly in the more posterior 
position of the dorsal and veutrals; otherwise there is no dift’ereuco of any note. Head, 
34-44; dejith, 4-4f; D. 10^11^; A. 94. Scales, 10-55-8. Teeth, 1, 4-4, 2 in two specimens; 
2, 4-4, 4 in another; and 2, 4-4, 0 in the fourth. Head pointed, the snout scarcely projecting 
beyond the month. Eye large, equidistant from tip of snout iuid from upper angle of gill- 
opening, the orbit about equal to the snout, 3|— 34 in the bead. Dorsal inserted directly over 
origin of ventrals, ecpiidist.aut from base of middle caudal rays and from posterior half of 
eye. Its first two developed rays elongate, the margin of the tin strongly concave. Highest 
dorsal ray equal to distance from tip of snout to upper angle of opercle. Caudal long, deeply 
forked, the lobes finely pointed, the middle rays half as long as the lobes, at least as long .as 
the head. Strnctnre of anal similar to that of dors.al. Ventr.als inserted equidistant between 
base of middle caudal rays and posterior half of eye, pointed, extending to middle of base of 
anal, equal to head less opercle. Pectorals less pointed than the other tins, as long as head 
or a little shorter. Light lirown with numerous wrcll-deflned Idotches, a dark band from tip 
of snout to base of caudal. All the tins with dark points along the rays collected in places, 
giving the fins a faintly mottled appearance. 
29. Hybop.si.s storeriaiiu.s (Kirtland). A number of small specimens from AVinnixieg are iirobably to 
be referred to this species. 
30. Couesius dissiniilis (Girard). Very abundant at Swift Current, Medicine Hat, Calg.ary, I’oplar. 
The sx>ecimens from Medicine Hat and from Poijlar are quite light in color. Those from Cal- 
gary and from Swift Current are darker, the lateral band being well defined. Scales along 
the lateral line 58-62. 
31. Platygobio gracilis (Richardson). Craig, Poxilar, Brandon, Medicine Hat. This siiecies is 
extremely abundant in the (Missouri River at Craig, and in its tribut.ary. Poplar Creek. A 
number were obtained with hook and line in the main stream at Craig, where the current 
is too swift for seining. In the slough at the same jilace none w'ere seen. One was obtained 
at Brandon, and I was told that it is abund.aut .at that jilace. Their xirojectiug snout and 
frosted silvery c.olor make them a striking species. The Largest obtained measures 20 mm. 
There is a dusky vertebral liand and a brown lateral one. 
32. Mylocheilus caurinus (Richardson). Mission, Kamloops, Sicamous, Revelstoke, Golden, .and 
Umatilla. 
33. Ptychocheilus oregoneiisis (Richardson). Kaiidooxis, Sicamous, Umatilla, La Grande, .and. 
Caldwell. Teeth usually 2, 4-4, 2. Dorsal with nine well-developed rays (i, 94). 
