50 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Two specimens, 4 and 7 inches long, respectively, from Crawfish Creek, just below 
Moose Falls, can not be distinguished from specimens of the same size from Cottonwood 
Greek or from McClellan Creek. 
Ten specimens from Little Blackfoot Biver, 34 to 74 inches in length, show 
considerable variation among themselves as to number, size, and shape of the spots, 
but these variations are independent of size, sex, or age of the fish. 
An 11-inch specimen from Lolo Creek, in life, was washed with red along the 
lateral line, more on upper parts of belly; back dark, with numerous black spots 
which arc larger and more irregular in outline toward the caudal peduncle; seven 
rather regular vertical rows of spots on the tail, about same number on dorsal fin; but 
few spots below the lateral line anteriorly, more numerous behind; two black spots 
on opercle; bright red dash on lower jaw; pectoral fins pale yellow, ventrals and 
anal darkish; very few spots on head. Little or no red on jaw of younger specimens. 
A great many examples from Dempsey Lakes were examined. These present no 
peculiarities of coloration, but some of them are a trifle deeper than any others that 
I have examined. The specimens from Rattlesnake Creek are also inclined to be deeper 
than the usual form. 
Two specimens, each 7 inches in length, from Swan Biver, at outlet of Swan Lake, 
present some peculiarities. Oue of them has the spots of the usual form and number, 
but the other has scarcely any spots on the anterior two-thirds of the body, while those 
on the caudal peduncle and caudal fin are much less numerous than usual. 
A specimen, 14 inches long, from Lewis Biver, just below the lower falls, showed 
the following color markings in life: Ground color of the body dirty ivhite, yellowish 
toward under side; spots very thick, largest posteriorly; dark greenish on back; no 
spots on top of head; sides ot head yellowish silvery, with a few small, round, black 
spots; a red blotch below and behind eye, wash of same on preopercles; opercles 
washed with red on lower two-thirds, extending over the branchiostegals to the red 
cut on the throat; a reddish wash along sides, mostly below lateral line; pectorals, 
anal, and ventrals all dark-reddish with some little traces of yellow; caudal and dorsals 
well covered with spots. 
A small specimen, 6 inches long, from Big Blackfoot Biver, in life showed four 
pale red splotches on side, the last one under the dorsal fin; few black spots on top of 
head, along back, and on dorsal and caudal fins; other fins, plain pale yellow; under 
parts silvery ; opercles purplish ; small red lines on lower part of throat, the beginning 
of the red gash characteristic of the species. 
I have given thus fully color notes on so many individuals and from streams trib- 
utary both to the Columbia and the Missouri, to make plain the little importance of 
color distinctions and the futility of attempting to find even varietal differences among 
the trout of the Columbia and Upper Missouri river basins. 
14. Salvelinus malma (Walbaum). (PI. xxv.) 
Salmo malma Walbaum, Artedi Pise., 66, 1792. 
This is the salmon trout or bull trout of western Montana. We obtained six 
specimens, 64 to 10 inches long, from Rattlesnake Creek, at Missoula, and from informa- . 
tion gained from local fishermen we have no doubt that it is common in most of the 
larger affluents of the Columbia in Montana, particularly in the Hell Gate, Missoula, 
Pend d’Oreille, Flathead, Bitter Boot, and Big Blackfoot rivers and in Flathead and 
