SALMON INVESTIGATIONS IN THE COLUMBIA RIVER BASIN IN 1896. 73 
last dorsal ray but two, its height equal to that of dorsal, its base equal to its longest ray ; free edges 
of dorsal and anal nearly straight; pectoral 1£ to in head, not reaching insertion of yen trals; 
ventrals short, 1-j- in pectoral, reaching anus; caudal deeply forked ; lateral line complete, decurved; 
color in spirits, brownish or olivaceous above, middle of side with a broad dark band involving the 
lateral line anteriorly and posteriorly, but lying chiefly above it mesially; middle of side from gill 
opening to beneath dorsal fin with a broad rosy band, following closely beneath the lateral line; 
lower part of sides and under parts silvery, dusted over with fine dark specks; a light yellowish band 
extending backward from upper posterior border of eye nearly halfway to origin of dorsal fin; cheek 
with a silvery or golden crescent; top of head dark; opercles dusky silvery ; snout dusky; fins plain, 
dorsal and caudal somewhat dusky. Numerous specimens were obtained in the Siuslaw River and 
one from Tsiltcoos.Lake. 
At Mapleton both this minnow and PtychocUeilus oregonensis are known as “chub,” while on the 
lakes south of Florence they are called “dace.” It is probably common in these lakes, but a single 
specimen only was obtained there. 
Compared with Leuciscus balieatus, which our specimens most closely resemble, the latter are seen 
to have smaller anal and dorsal fins, a more slender body, smaller and more slender head, and longer, 
more pointed snout. The extent of variation in proportional measurements and in the number of anal 
fin rays appears to be much less than in L. balieatus. 
This species also resembles Leuciscus cooperi of Girard. In the type of L. cooperi (No. 238, 
U. S. N. M.) the lower jaw is notably shorter and the snout more pointed. 
In the following statement will be found measurements of a number of specimens from Siuslaw 
River, Mapleton, Oregon : 
Total 
length 
Head. 
Depth. 
Eye. 
Suout. 
Dor- 
sal. 
Anal. 
Scales. 
Total 
length 
Head. 
Depth. 
Eye. 
Snout. 
saL 
Anal. 
Scales. 
\ Inches. 
5.75 
4. 20 
4.17 
3. 50 
9 
13 
11-58-7 
Inches. 
4. 50 
4. 00 
3. 83 
3.50 
3. 50 
7 
12 
10-60-7 
5.50 
4.00 
4.00 
4’. 00 
3. 60 
8 
11 
12-59-7 
4.50 
4. 00 
4. 00 
3. 80 
3. 50 
9 
12 
10-59-7 
5.50 
4.00 
4. 17 
4. 00 
3. 60 
9 
13 
10-59-7 
4.50 
4. 00 
4. 40 
3. 40 
3. 80 
9 
12 
10-61-7 
5.50 
4. 17 
4.17 
4. 00 
3.60 
9 
13 
12-64-6 
4. 50 
4. 00 
3. 80 
3. 80 
3. 75 
9 
13 
10-59-7 
5. 25 
4. 00 
4. 00 
4. 00 
3. 75 
g 
12 
12-60-7 
4. 25 
4. 00 
4. 00 
3. 60 
3. 80 
9 
11 
10-63-6 
| 5.00 
4. 00 
3.80 
3. 50 
3. 60 
g 
13 
12-60-7 
4. 00 
4. 00 
4. 00 
3.20 
4. 00 
9 
13 
10-61-7 
4.50 
4. 00 
4. 17 
3. 50 
3. 50 
9 
13 
12-64-6 
The anal fin rays were counted in 16 additional specimens with the following results, the average 
for the total 29 specimens being 121 : 
13. Leuciscus balteatus (Richardson). 
Abundant throughout the Columbia River basin except above Shoshone Falls. Specimens obtained 
from Alturas, Pend d’Oreille, Gamlin, and Washington lakes. The variation in the number of anal fin 
rays of specimens from these localities is shown in the following table. The length is measured from 
tip of snout to base of caudal fin. The last ray, though usually deeply divided, is counted as one. 
There are usually two rudimentary rays at front of fin, which are not counted. Of 30 specimens 
from Gamlin Lake, 1 has 13 rays, 7 have 15, 14 have 16, 4 have 17, and 4 have 18, the average being 16 
rays. Of 10 specimens from Lake Washington 5 have 14 rays, 3 have 15, 1 has 16, and 1 has 18, the 
average being 15 rays. 
