174 BULLETIN OF THE BUREAU OF FISHERTES. 
an equal distance posteriorly when fin is depressed; posterior edge of fin slightly concave; caudal 
deeply notched; origin of ventrals about a pupil’s diameter in advance of dorsal; tips of fins just reach- 
ing anal opening; pectorals obtusely pointed, Color plain; dusky above, light below. Length about 
290 mm. 
Willamette River. 
16. Leuciscus bicolor (Girard). 
One specimen was taken in the Klamath River near the mouth. 
17. Leuciscus balteatus (Richardson). 
Among the coastwise streams of Oregon this species has been taken in the Umpqua, Siuslaw, 
Takenitch, and Tsiltcoos rivers. It probably does not occur south of the Umpqua, nor in any of the 
streams between the Siuslaw and the Columbia. 
Specimens of this form from the Siuslaw River were lately described by Dr. Evermann and Dr. 
Meek@ under the name Leuciscus siuslawi. They were said to differ from ZL. balteatus in having smaller 
anal and dorsal fins, a more slender body, smaller and more slender head, longer and more pointed 
snout, and fewer anal rays. Ina large series of examples from the Siuslaw, Tsiltcoos, Umpqua, Willa- 
mette, and Columbia rivers, these distinctions disappear entirely, and the Leuciscus from the isolated 
coastal streams of Oregon does not appear to differ in any way from that of the Columbia. It is to be 
noted, however, that no western Oregon specimens, whether from the Columbia or neighboring basins 
have been seen in which the anal fin rays numbered more than 16. It will be of interest in this 
connection to compare the following table of counts of fin rays with a similar one published by Dr. 
Gilbert and Dr. Evermann.? 
Willamette, Siuslaw, Tsiltcoos, Takenitch, and Umpqua basins. 
MerasureMENts Or Leuciscus BALTEATUS FROM Four River Basins. 
Umpqua River, Callapooia Creek, 
Oakland: Takenitch Creek, near mouth. 
Mang th DOW y sce cen cee ee enemies mm. . 97 | 92 94 93 96 96 
Depthibod yy: <Senmc. ck ane neceeee nn neeaene seer a 26 } 29] .27 -28 +25 .25 
Length head. _. 24 | 25] .25: | 0255) 225% ||saas 
Length snout.. 6 08 -O8 | .085]} .08 -085 | .08 
Height dorsal... -| 175 -18 -18} .185} .18 -19 .175 
SUNT ar WN eo es arc SoG soe pate eines | .18 VW eek) cathy | saith, -18 
| Columbia River, Umatilla River, 
Siuslaw R 
Siuslaw R Pendleton. 
ODS th DOG ys.n s\los tents seis seers mm. . 110 84 | S40 78 78 77 70 
MOP tH DOG yas secs ee ee cele: eevee eects inane se 26 27| .26 i ~26 | .265 ~27) .28 
Length head... 25) .25 -25 | .25) .23 ~25,| 325 
Length snout... OS | .08 | 08 -O8 | .075 -O8 | .075 
Height dorsal... 20 -17 | | .18 219)! 31% -20 | .20 
Palehe anal eee esc cen ene ee eee ee eecncens 19 17 18 -18} .18 -18 | .19 
a Leuciscus siuslawi Evermann & Meek, Bulletin U. S. Fish Commission, vol. Xvm, 1897, p. 72. 
> Gilbert, C. 11., & Evermann, B. W., Bulletin U. S. Fish Commission, vol. Xrv, 1894, p. 196, 
