FISH FAUNA OF LAKES OF SOUTHEASTERN OREGON. 85 
MEASUREMENTS OF SPECIMENS OF PryCHOCHEILUS OREGONENSIS—Continued. 
From Willamette River, near Corvallis, Oreg. 
. | 
Length of body-=-32.-...::-. se -.---- mm... 
TANT NE sR i ee ers Se ne eee 
LE ets he a ES ae aor 
BSMOUG EO GOFSAl eee eee cons canis slen tn 
Bnoumbonventralee —ocreetes sane snee soya nae 
ania Oia = ca eee secon ee sane acl. 
Menp inna ear y= = se eee. Senn senate 
DUBIN BEAL OVerer ss oweeat cerita tan Js ape 
Interorbital width.......-.........--.:.-- | 
TS CAPS TU Gs Se ee nls ae 
IPR anes Saeco nee seen do cs. = 
Length pectoral: 2. 2221 ----- 2.5.6: 
Length ventral. .-....-...--..2..... 
Length caudal 
Dorsal rays 
Anal rays.. 
Seales later: = | 
Scales before dorsal... ..---.----- At 
Scales above lateral line. ................-- 
Ptychocheilus grandis (Ayres). 
Pitt River, near Alturas, and in Big Valley. 
Leuciscus balteatus (Richardson). 
Warm Springs, Silver Creek, and Silvies River. 
Specimens collected at Warm Springs and at Silver Creek were brilliantly colored, especially the 
former, a description of which follows: Dorsal surface of body deep green; a narrow, diffuse, brassy stripe 
extending from eye along lateral line, falling below it posteriorly, forming-a ventral border to the greenish 
dorsal area; an indistinct dark greenish stripe extending from eye along the side just below the brassy 
band; breast and abdomen silvery; sides just below greenish band bright red; snout anterior to eye 
greenish; cheeks below eye and opercle brassy; fins golden. Immedately after death the greenish dorsal 
area turns to a steel blue. 
In this connection a color description from life made at Cow Creek, a tributary of the Umpqua 
River, may be of interest: Dorsal surface dark, dull olive; a narrow, sharply defined yellowish orange 
band, one scale wide, extending from posterior edge of orbit to middle of caudal peduncle, dividing 
the olive area posteriorly so that a narrow space of the latter color extends below the yellow stripe; 
breast and abdomen silvery white; sides below yellow stripe orange, the upper edges of the orange area 
deeply suffused with red; snout, upper part of head, olive; a bright red patch below eye, separated 
from the latter by a narrow olive area; opercles brassy; fins yellowish. 
The following table shows the number of rays in the anal fins of 124 examples. Attention is directed 
to the fact that Warm Springs and Silver Creek are closely connected, while Silvies River is isolated 
from both. 
ale wrGs ] 
Warm |_ Silver | Silvies 
Springs. Creek. River. 
Anal fin rays. 
Specimens. | Specimens. | Specimens. 
2 
: = ees J 
aF¥or a discussion of the variation in the number of anal fin rays of ZL. balteatus see Gilbert and Evermann, Bulletin 
U.S. Fish Commission, vol. xiv, 1894, p. 196. 
