EXPLORATIONS IN WESTERN CANADA, ETC. 
115 
39. Hiodon tergisus Le Suenr. Winnipeg, Brandon. 
40. C'oregonus williamsoni Girard. This species is extremely abundant in the Missouri River at 
Craig. It was also taken at Idaho Falls in the Snake River, at La Grande in the Grand Ecnide; 
at Golden, Eevelstoke, and Umatilla in the Columbia River; at Caldwell in the Boise Eivmr; 
at Calgary and Banff in tlie Bow River, where it is called grayling, and at Sicamoiis in 
Shushwap Lake. There are miiuite ditferences between the specimens taken at different 
places, but I am unable to distinguish specific characters to separate them. 
41. Coregonas coulteri Eigenmann & Eigenmaun. Many specimens, the largest measuring 195 mni., 
from the Kicking Horse, at Field, British Columbia; one specimen from Golden. Head, 41-5; 
depth, D. 101-11-^; A. 12-13; scales 7, 60-63, 7 (to ventrals). Form rather heavy, 
little elevated, the snout liroad, very liluut and decurved; greatest depth of head equals its 
length less the opercle. Mouth low, the snout but little projecting, maxillary reaching eye 
in largest specimen, further in the smaller ones. Eye equals snout, 4 in head. Supplemental 
bone a crescent. Gill-rakers much as in wilUamsoni. Dorsals and anal shorter and higher 
th.'in in williamsoni. Scales large, dnll silvery; the spots of the young not so conspicuous as 
in those of williamsoni. Length of largest specimen to origin of dorsal, 68 mm. (Plate 6.) 
42. Oncorliynchus t.scliawytsclia Walbaum. Golden, 11 specimens, the largest 120 mm. Revel- 
stoke, a large number of sxiecimens, the largest 120 mm. La Grande, 1 sxiecimeu. JIi.ssion, the 
largest 95 mm. Kamlooxis, 1 specimen. 
43 . Salmo mykis,s Walbaum. Calgary, Banff, Griffin Lake, Sicamous, Kamlooiis, Idaho Falls, and 
Craig? The sx)ecimens from Calgary and Banff' resemble verj^ closely sxiecirnens in the 
collections of the Indiana Llniversity from the Rio Grande at Del Norte, Colorado. In one of 
the Eio Grande specimens I count 181 rows of scales; Dr. Jordan counted 155 to 160 in those 
he examined. In one of the Calgary sxiecimens I lind 156 rows. In the shap)e of the head and 
in color the specimens from Calgary and Banff' are almost exact reproductions of the Rio 
Grande sx>ecimens. I therefore see no reason why the two should go under different names. 
The question of the number of s|recies of trout does not appear settled as yet, nor is it 
prol)able that it will be until all the trout are caught. Specimens from Kamloop>s differ from 
those from Calgary in having slightly larger s^jots. Those from Griffin Lake have still larger 
and more numerous sx>ots. 
44. Thymallus .signifer ontariensis Valenciennes. A single s^jeeimen, 212 mm. long; D. 21; A. 12; 
scales, 91. Craig, Montana. This sxjecimeu differs from the sxiecimens obtained by Jordan 
in the Aladison River and at Horsethief Sxu'ings, in the larger scales, being in this res^iect 
identical with the typical signifer, and in having the black spots extend quite to below the soft 
dorsal fin. The color of the dorsal is as described by Jordan.* 
45 . Salvelinus namaycusli (Walbaum). Calgary, Banff, Devils Lake, Golden, and Eevelstoke. A, 
sjiecies of Salvelbiiis, iirobably to be referred to this species, reaches a large size, a meter and 
more in Devils Lake, in the Canadian Eocky Mountains Park. A jjhotograxih of one of these 
larger individu;ils shows it to be everywhere x>i’oftisely spotted on head, sides, and back. 
The sjjots are slightly larger on lower ])arts of sides. Those of the head do not differ froin. 
those of the body. The dorsal, caudal, and to some extent the anal, ventrals, and piectorals,. 
are also profusely S]rotted. The largest siiecimen obta.ined measures about 435 mm. The.- 
spots are much less numerous than in the pdrotograph and those of the head show a tendeircy 
to unite, leaving a dark reticulation as a background. Dorsal, soft dorsal, and caudal well 
spotted; anal and inner surfaces of ventrals and piectorals also spotted. The anal margined 
in front and above with white. In this larger sxrecimen the teeth of shaft of vomer are 
well developed. 
In the Bow, into which Devils Lake has an outlet, and in the Elbow there are numerous 
small trout which are considered distinct from those in the lake. The largest of those obtained 
at Banff measured 300 mm. in length, the rest from Calgary are all smaller. In this largest 
s])ecimen and in all the smaller ones no teeth are develoj)ed on the .shaft of the vomer. In a 
s}iecimen about 300 mm. long, from Lake Michigan, the shaft of the vomer has well-develoiied 
teeth. This would lend color to the X50x>ular belief that those of the river are different 
from those of the lake. The river spiecimens have smaller and much fewer sjiots, the dorsals 
and caudal and inner surface of piectorals are dusky without indications of spiots; there are 
few or no spiots on the head. A specimen 165 mm. long has these character.s still more emiiha- 
Bull. IT. S. Fisli Com., i.x, 50, jjl. viii, lig. 7. 
