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or 
FISHES OF OREGON AND NORTHERN CALIFORNIA. 1 
Anat Fin Rays or Leuciscus BALTEATUS FROM STREAMS OF WESTERN OREGON. 
1 12 13 14 Nee |) ak 
Locality. 
rays. | rays. | rays. | rays. | rays. | rays. 
. = be ee Seas at ys 
Umpqua basin: 
DOUTNAUTN DE a RAVEN COSGDULE . « «ccc cewccesenccqccancnnescuascedeaaps  Nysoe peal Pe il Peeled 24 16 2 
South Umpqua River, Canyonville | | y 25 28 Tall eaee ee 
North Umpqua River, Winchester. ee ayes as S| betta 2 | | speoes Here stad 
To} SLC SST DS Eon = See ee ee ee 
Cow Creek, Douglas County..............-..... 
Callapooia Creek, Oakland... 
Deer Creek, near Roseburg. 
Takenitch Creek...........-. 
Tsiltcoos River............-- 
Junction Lake and Deadwood Creek 
Willamette basin (Columbia): 
Willamette River, Corvallis. 
Willamette River, Eugene. . 
Long Tom Creek........ 
The Lakes, Albany-....-. 
Coast Fork, Cottage Grove..... 
Row River, near Cottage Grove 
18. Rutilus symmetricus (Baird & Girard). 
A minnow of this type occurs in the Navarro, Gualala, Russian, and Napa rivers, Specimens from 
the Russian and Napa rivers are alike in all respects, and they in turn agree closely with representatives 
from the streams tributary to San Francisco Bay. In a majority of cases the dorsal fin has 9 rays and 
the anal 8. The snout is rather pointed, the caudal peduncle slender and the fins long, the whole body 
being trim and well proportioned. Examples from the Navarro and Gualala rivers are distinguished 
from these by having generally 8 rays in the dorsal fin, a more robust body with a deeper caudal 
peduncle, and a more rounded and shortened snout. The fins are also shorter and somewhat less acute. 
While examples from the Navarro and Gualala rivers thus agree in differing from specimens taken in 
the neighboring basins, individuals from each of these streams bear a distinctive local stamp by which 
they may be recognized without difficulty, the Navarro examples haying mostly one more ray in the 
anal fin and larger scales in the series above the lateral line. It has been shown that individuals from 
the partly isolated rivers tributary to San Francisco Bay@ are alike in all points and that these are 
scarcely to be distinguished in any particular from individuals from the Napa and Russian rivers. 
Hence it appears that there are 3 well-differentiated forms of Rutilus in this somewhat restricted 
region, each of which occupies a distinct hydrographic basin or series of contiguous basins. When, 
however, the field is broadened and specimens from distant parts of the Sacramento and San Joaquin 
basins are brought together, similar variations of a local nature are found to occur, but whether any 
geographical significance may be attached to these can not be known until more extensive observations 
have been made. One of these local forms (Rutilus symmetricus) from Drew Creek, a tributary of 
Goose Lake, appears almost exactly to parallel the Gualala form, while another from Mariposa Creek, 
a branch of the San Joaquin, seems to be somewhat intermediate between the Russian River and 
Gualala varieties. 
The males of R. symmetricus when in nuptial dress have the upper part of the head and body 
covered with tubercles. There is a patch of bright orange red at angle of mouth, on edge of preopercle, 
upper edge of opercle, and on bases of the paired fins. The sides of head and lower parts of body 
have a translucent brassy color. 
The species does not occur to the northward of the Navarro River. 
Navarro, Gualala, Russian, and Napa rivers. 
a Rutilus symmetricus, Snyder, Appendix to Report Commissioner of Fisheries for 1904, p. 332. 
