FISH FAUNA OF LAKES OF SOUTHEASTERN OREGON. 81 
TABLE SHow1inGc NuMBER OF Rays IN Dorsat FIN or CATOSTOMUS OCCIDENTALIS FROM DIFFERENT 
Locauitres IN THE SACRAMENTO BAsIn. 
e | Cache 
Cotton- : Creek, 
Dorsal rays. wood Go wes Yolo 
| Creek. | ‘ County, 
| | Cal. 
Po mes Tae ; ie i 
rn | Specimens. Specimens.) Specimens.| Specimens. 
ber csec 68 eed aoe 3 lou We eee en od 
2 40 9 13 15 
5 2 | 1 5 
. Ve | Se ee esas 2 
| 
Catostomus macrocheilus Girard. 
A few specimens were collected from the deeper parts of the Silvies River, near Burns. 
agree in all details with examples from the Columbia. 
Thisspecies and C. occidentalis of the Sacramento appear to be very closely related. They resemble 
each other perfectly in general appearance except that the Columbia form seems to have a smaller eye 
and shorter and more rounded pectoral fins. The scales are alike in both cases, and the fin rays are 
about equal in number. 
They 
MEASUREMENTS OF SPECIMENS OF CATOSTOMUS MACROCHEILUS FROM SILyIES River, NEAR Burns, 
Harney County, OrEG. 
| | 
SSE Gh) OL DOC wre. ener ant os - mm..! 160 | 156 150 152 150 140 124 96 95 
Length of head. edie sa Jonase 24 | -25 25 25 ~25 26 255 26 25 
Depth of body.. 235 235 22 24 -23 245 24 -23 + 235 
Snout to dorsal... . 525 etsy” -52 . 525 . 52 . 54 - 525 ~53 - 525 
Snout to ventral........... . 575 -o7 - 595 -58 ~ 595 -59 - 595 - 60 - 58 
Depth of caudal peduncle... -075 | .08 +075 -075 - 075 -077 -08 - 08 075 
Width of lower lip.--...... - 045 -05 05 - 05 . 046 05 05 -05 - 042 
Length of snout... . - 125 - 125 - 125 12 -115 13 125 wiz 11 
Diameter of eye... 05 - 045 - 05 -05 -05 05 - 055 . 052 06 
Depth of head... . -18 175 oles - 185 ~175 - 185 .18 18 .18 
Height of dorsal -18 -18 -18 -19 18 - 185 - 205 - 205 20 
Height of anal. ..... -18 18 18 .18 18 .18 - 185 +17 .18 
Length of pectoral... wae - 195 -19 . 185 .19 .19 -20 -19 - 20 
Length of ventral... 16 155 15 145 15 155 -16 15 16 
Length of caudal. ~25 - 26 255 26 . 265 - 26 27. -28 26 
Dorsal rays.-....-.-- 15 14 14 14 14 13 14 14 13 
Scales of latera! line... 7 66 65 64 64 64 66 64 66 
Scales above lateral line 4 13 13 14 13 13 13 14 14 14 
Scales before dorsal...-...........-----..-. : 33 33 36 31 34 34 37 32 33 
Catostomus warnerensis, new species. 
The catostomid found in the Warner basin appears to be related to both C. tahoensis of the Lahontan 
system and C. catostomus of wide distribution to the north and east. Although resembling each very 
closely, it can not as we now recognize those species be identified with either. The Warner form has 
larger scales, there being fewer in the lateral line (73 to 79 compared with 79 to 104), smaller eyes,and a 
smaller mouth with narrower lower lips. Its affinities are also with the very similar small-scaled species 
C. microps@ of the Sacramento andC. rimiculus of the Klamath. It appears, however, to have larger scales 
than either of these forms. It differs from C. microps also in having a larger eye. 
Cope? identified C. warnerensis with the species common to the basins of the Lahontan system, but 
it appears no more closely to resemble that form than it does C. catostomus. As here defined the species 
is found only in the Warner basin. It inhabits the larger streams tributary to the lake, appearing 
aRutter, Cloudsley, Bulletin U.S. Bureau of Fisheries, vol. xxv, 1907, p. 120. 
Cope, E. D., Proceedings Academy Natural Sciences, Philadelphia, 1883, p. 152. The difference in the size of the seales, 
as shown by examples from the two basins, was noted by this author: ‘‘ Pyramid Lake; scales, 14-89-14."’ “‘ Warner 
Lake; scales, 16-83-15.’" 
