FISH FAUNA OF LAKES OF SOUTHEASTERN OREGON. 93 
jaw projecting slightly; gillrakers 16, sometimes 14 or 15, very short and pointed; teeth 4-5, rather stout, 
the posterior one more slender than others; grinding surface well developed; tips of teeth, especially 
the middle ones, slightly hooked; peritoneum dusky; intestinal canal short, about 1} times total length 
of fish; lateral line complete, decurved just behind head; origin of dorsal immediately above that of 
ventral, free edge of fin behind third ray slightly concave; free edge of anal straight; pectorals and 
ventrals short and rounded, the latter not reaching anal opening, in some examples extending to base of 
anal fin; lobes of caudal rather acutely pointed. 
Color in alcohol silvery, very dark on upper parts. In life, specimens taken at Warm Springs 
were of a remarkably beautiful deep-green color on the dorsal parts, the sides being tinged with brassy. 
The cheeks and opercles were steel blue, growing brassy toward the ventral parts. The pectorals, 
ventrals, and anal were tinged with red. Examples from Silvies River were not so highly colored. 
The fins of males are sometimes slightly longer than those of females. The appended table will 
show some individual variations. 
Specimens were taken in the Malheur basin from Silvies River near Burns, and from Warm Springs. 
The presence of this species in the Columbia River was discovered by Dr. C. H. Gilbert, who found 
specimens in the Portland market, and also collected them in the Weiser River at Weiser, Idaho, and 
in the Payette River at Payette, Idaho. Its relation to the form found in the Bonneville basin is not 
known. 
MEASUREMENTS OF SPECIMENS Or RUTILUS COLUMBIANUS. 
From Warm Springs, Harney County, Oreg. 
| | 
Length of body =e coeaces mm.. 126 | 144 119 | 112 109 109 107 105 | 103 101 
Length head a) E29. -28 -28 -28 -20 "529 -29 sa0) |) pee 30 
Snout to oeciput- Seton) 22 215 | -22 o2e: || 22 225 22 -22 -22 
Snout to dorsal. ..............- -|  - 585 | 58 -56 | .56 - 60 -58 59 -58 56 57 
Snout to ventral. .............- 5 sat |). 687. -55 | .56 58 57 58 -575 56 55 
Meni NOGV ane dswscces = «nae EP 27a 1228 -29 -29 -28 «2 30 .30 -28 -29 
Depth caudal pedunele. ....--- : BIS ah) 3. oS 13 .12 -125 13 13 13 
Rengthianonb.. 0. 25 2..22.--2- -| 09 -09 -08° | .08 . 09 -08 | .09 -085 | .09 . 085 
Length maxillary......-.....--- aie) 08. 09 075 075 -09 | =. 08 -09 - 085 - 085 - 085 
Diameter eye...-....--...-.--- e -055 | .05 055 - 06 -055 | .06 05 - 055 06 06 
Interorbital width...........- -10 10 - 085 08 09 09 10 abl -09 10 
aighy.dorsalcs3) 2). 2 S2sc-o0= di -18 -19 ook -20 | .20 -20 -19 -19 -18 -23 
Height-analois ie. -:. 2-2. 2222-5. < Si sty -18 -17 -15 -16 15 -15 15 -18 
Length pectoral............----- A Se -20 -20 ile s)he cits} 17 -18 16 32Y 
Reneth ventralis 2252 tht _ -16 . 155 19 -19 -16 -16 -16 -16 -14 -20 
Lengeth:caudal .-.5.22-2..255. 4 «28 . 265 «29 -28 -26 27 +28 - 25 +25 30 
Scales lateral line.....-........ 49 45 45 46 | 45 | 46 47 45 45 43 
Scales above lateral line... -. a 12 | ll 11 ll 12 ll ll 12 11 11 
Scales below lateral line........- 6) 6) 6 5 6 5 6 5] 6 6 
Scales before dorsal.......-.-. 27 28 | 29 26 26 | 27 27 28 | 25 27 
Donsalithvssc on 3. see eae 2 8 | 9 9 9 9) 8 9 9 9 9 
PATIGUITAW SS toca see eae Se toroe ce baste 8 8 8 | 9 8 | 8 8 8 8 8 
\ | | 
Bengthiotbodyeaces-----22.5.-8.+ 0: mm..!| 98 90) ett! a Sail) wuss 
Vaan Rs SS eae Be eee = ae ie eae -29 -29 -28 -29 31 
BMOUELOOCCIDNtereec ats ete sees eee vce le - 22 -23 22 Bes) AL PE 
Bnoubite dorsal ses ss22o.- ce ee ek. ase -58 59 57 00h.) | meLbS 
ROOM GUO WEN Url sic cpeee ees eee eae 57 57 . 575 - 59 57 | 
WMapnhibad yi cee. 2a cbs cee ek ace ect -27 27 -29 «29 80 
Depth caudal peduncle. -.....-......-..--. 12 213 12 212 et2 
Denpiianoutiae owenc re: <a- 5 eee soos - O85 -09 08 09 09 
ene th mamilary ccc ss cece al ae secede ee -08 .09 -08 | .085 . 095 
WIRMELEU EVA aca” «ten ese rOnae sr aatens 05 06 . 055 - 065 . 055 
Unterorbital width<<-222..20525.22 32.2. -09 - 09 -10 10 
Height dorsal. ..... a - 20 | -19 BLS ili! Sued 20) 
Height anal.... -17 -15| .14 -16 16 
Length pectoral -19 16 215 -18 17 
Length ventral. = -17 15 -14 -16 16 
are HAGA Se eae eee oa anes keto 129 Ba Seri) Sy BOR | Sz 
Seales lateral line-.-/.2...-2-.2.--2-2.-- se 45 45) 44 48 45 44 
Seales above lateral line..........-....-. | 11 12 11 12 11 | il 
Scales below lateral line................--- | 6 6) 6 | 7 6 5 
Scales before dorsal..........,..---------- 26 28 | 26 27 | 26 25 
1D Tepe tok Oe ae oa 8 | 9 | 8 | 9 8 | 9 
DAE. ble ee aes ee Ee se ae 8 | 8 8 8 8 | 8 
