FISHES OF OREGON AND NORTHERN CALIFORNIA. 165 
ScaLE AND FIN CHARACTERS OF CATOSTOMUS HUMBOLDTIANUS FROM Map, Ext, AND Bear Rivers. 
| 
Mad River. Eel River. Bear River. 
_——-— = = 
Scales | Scales | Scales -« | Scales | Scales | Scales rq | Scales Seales Scales | 7 
in lat- | above | before | ays in lat- | above | before Ray ri in lat- above | before | ae 8 
eral | lateral | corsa sal fin.| @Tal |lateral dorsal | Ant fn. | eral |lateral | dorsal | (2 °or 
line. line. | fin | line. line. fin. | é line. line: fin, | S#! fin. 
== — md } — 4 
| 
| 
65 13 33 12 67 13 32 | 12 64 12° | 29 ll 
65 12 | 28 12 65 12 31 | 12 63 | 12 28° | 12 
65 13 31 12 62 13 31 12 64 13 | 28 12 
62 14 | 29 12 67 13 30 |} 12 64 13 30 ll 
65 13 28 12 64 13 |} 31 12 63 12 28 | 12 
63 13 | 28 | 1 68 13 31 | 12 66 13 31 | 12 
69 13 | 31 | 12 68 13 30 12 62 13 28 | 12 
65 13 | 33 12 66 13 30 | 12 64 4 31 12 
65 14 31 | 12 67 13 30 | 13 70 | 13 30 12 
65 | 12 | 31 | 12 69 | 14 33 | 12 63 14 30 12 
65 13 32 | 12 67 14 33 | 12 64 13 30 | 12 
65 13 30. | 11 68 12 33 12 63 | 13 29 | 12 
66 14 | 32 | 12 67 1 30 | 11 63 13 28 | 12 
68 13 31 12 66 13 29 | 12 62 12' | 29 | 12 
69 1638 | 31 | 2 66 12 28 12 63 12 | 29 | 12 
67 ut) 29 il 67 13 | 28 ll 67 13 30 12 
67 13 | 32 | 12 66 12 29° | 12 | 62 | 12 29 ll 
64 12 | 2 12 62 128) 2950 12 63 | 13 29 12 
65 | 12 | 29 | 11 64 12 | 27 12 64 13 29 12 | 
65 | 12 | 23 | 12 65 13 31 12} 60 12 29 12 | 
| | | 
CoMPARATIVE SCALE AND FIN CHARACTERS OF CATOSTOMUS OCCIDENTALIS AND CATOSTOMUS 
HUMBOLDTIANUS. 
C. occiden- AG hum- | | C.oceiden-| C. hum- 
| talis. | boldtianus. talis. _— boldtianus. 
Having in series above lateral line— | | Specimens. Specimens. || Having in series between occiput | | | 
TIRECHIBH eos serene ne eee thet. oe cee ol 2 | and dorsal fin— iContinuea); Specimens. Specimens. 
12 scales. 32\seales.-...-- ee sel| 23 6 
13 scales. 33 scales. . 
14 scales - - -| 34 scales . . 
15 scales. - 35 scales - 
16 scales. . 36 scales - 
17 scales 
Having in series bet ween occiput and | Showing in dorsal fin— | 
dorsal fin— ML TAYSs Jeo ho ec eotesea eas Seeasalseaseete anes | 12 
RRC HIGH Pie mee claves esate nee eia ln ietninm eles an 1 12 rays... 52 | 55 
BAP RT aod kes OR A ee Sa Bicome ener 12 13 rays... 42 | 2 
29 scales. - 3 14 14 ray 5 |-----5-2-02- 
30 seales - ll 13 15 rays... Bi eet oseae 
31 scales. . - 12 16 | | 
6. Catostomus snyderi Gilbert. 
The coarse-scaled sucker of the Klamath appears to be a rare form, but few examples having been 
seen. One large individual was taken in the Klamath near its mouth. 
The species seems to differ from C. occidentalis and C. macrocheilus in having a shorter and some- 
what deeper head, a narrower mouth with smaller lips, a much deeper caudal peduncle, somewhat 
smaller scales and fewer dorsal rays. 
Klamath River. 
7. Catostomus macrocheilus Girard. 
The coarse-scaled sucker of the Columbia River is so nearly like that of the Sacramento that its 
specific distinctness may be regarded with some doubt. It appears to differ from the Sacramento form 
in having slightly shorter fins, the pectorals being at the same time more rounded, and in usually haying 
asmaller eye. ‘ibe scales are alike in both forms, and the fin rays are equal in number. 
C. macrocheilus occurs in the larger coastwise streams of Oregon north of the Rogue River. No 
characters have been detected which will serve to distinguish specimens taken in any of these rivers 
from those of the Columbia basin. The results of a comparison of a few specimens from each of several 
isolated basins are given in the appended tables. 
