5 
122 BULLETIN OF THE BUREAU OF FISHERIES. 
Description based on 4 specimens 5 to 6.5 inches long from Warner Creek, a tributary of North Fork 
of Feather River. The following table gives the variation in the number of scales in the lateral line in 
specimens from four localities: 
| Warner | Duck | Beck- | Miller Scales. | Warner | Dueck Beck- | Miller 
Creek. | Lake. with. | Creek. = | Creek. Lake. | with. | Creek. 
Scales. 
Speci- | Speci- | Speci- | Speci- Speci- Speci- | Speci- 
mens. mens. | mens. | mens. mens. mens. mens. 
1 : 
1 
Sia] dee el 
1 || 
| 
1 |] 
2 
2 
L | 
Loca Distripution. 
Locality. | Stream or lake. Basin division. | Collector. 
Rutter & Cham- 
berlain. 
do. 
do. 
Rutter & Atkin- 
| son. 
Oho eBess- 55254 do. 
Miller Pass: 55sec saee ences ae eases te MilleriCreekt\3s-.2) ee tees see eee esse 
| 1 
The specimens from Miller Creek were obtained at its source in Miller Pass, at an elevation of 
7,100 feet, with several miles of impassable waterfalls either on the Lake Tahoe or Sacramento side. 
Trout from Lake Tahoe have been planted in the stream, and it may be that suckers were accident- 
ally introduced at the same time. 
6. Catostomus occidentalis Ayres. Western Sucker. 
Catostomus occidentalis Ayres, Daily Placer Times and Transcript, May 30, 1854, San Francisco markets. Agassiz, Amer. 
Jour. Sci. Arts 1855, p. 94. Jordan & Evermann, Fishes of North & Mid. Amer., pt. 1, p. 178, 1896. 
Catostomus labiatus Ayres, Proc. Cal. Ac. Sci. 1855, p. 32, Stockton. 
Catostomus areopus Jordan, Bul. U. S. Nat. Mus. 1878, p. 173, South Fork Kern River. 
Head 4.1 in body; depth 5; eye 5.5 in head, 2.7 in snout, 2 in interorbital; snout 2 inhead. (Meas- 
urements on a specimen 218 mm., or 8.5 inches, long, not including caudal fin.) 
In general the head is rather slender and somewhat conical. The lips are of moderate size (for 
the genus), the lobes of the lower extending about to vertical through nostrils; about 7 rows of papille 
on upper lip, those of the middle rows larger; one row of papillze across symphysis of lower lip and 
about 9 in a row through lobes. Eye in posterior half of head. Gillrakers few and short. Dorsal 
outline of body regularly curved, the scales enlarged posteriorly, as is usual with the genus. Dorsal 
fin inserted about in middle of body, but varying from 0.50 to 0.53 of the body length from tip of snout; 
rays 12 or 13, sometimes 14; its height greater than base, margin slightly concave. Lateral line straight; 
pectorals reaching almost to vertical through origin of dorsal; yentrals inserted below middle of body, 
not quite reaching vent; anal about reaching rudimentary caudal rays, its base about half its height; 
lobes of caudal about equal, the middle rays about 1.5 in longest; depth of caudal peduncle slightly 
less than width of interorbital. 
The type of this species was secured in the San Francisco markets, and probably came from the 
lower Sacramento or San Joaquin or their lowland tributaries. Cache Creek is the nearest stream to 
the probable type locality, from which many specimens have been preserved, and we have based our 
description on specimens from that stream. They were collected by Mr. Snyder in 1899. 
The extremes of measurements, expressed in hundredths of the body, are as follows: 
Mead 26) c33 SS Saeko esc 2 ae sn ore be i Length oficaudal peduncle2_-2_------.--------.--5 0. 155-0. 17 
Depthis = 2222s cose ee eee- csoe sete aoe aa ee eee é .24 | Origin of\dorsal from) snout. --=----.22----------26 . 49- .54 
YO s 25 scenes See ear ee ne eee mee ones S dnsentionlofive wt lel seeps eee ene ee . 56- .58 
Interorbital Oniginvofians beeerserate een see eee eee df= 0) 
Snout Base Ofdorsaliieases 2 ee 4 se es ence oe ae ee eae . 15- .185 
Depth of caudal peduncle F 7 Heiphtior dorsalissaseae-pacseenem ance eieeae cece . 155— . 22 
