80 BULLETIN OF THE BUREAU OF FISHERIES. 
3) 66 
set forth than when such expressions as ‘‘closely related,” “its affinities are with,”’ 
and the like are alone used. Jn many cases the results of comparative measure- 
ments of certain parts are merely negative. They are valuable, however, and are 
generally recorded. Characters which for one reason or another may at once be 
determined valueless, such as the number of caudal rays, occasionally the dopa of 
the body, ete., are omitted. 
The measurements have been made by means of a proportional scale, from 
carefully prepared specimens. They are expressed in hundredths of the length of 
the body (which is recorded in millimeters), measured from the tip of the snout to 
the end of the last caudal vertebra. (See diagram, p. 79.) 
CATALOGUE OF SPECIES. 
Entosphenus tridentatus (Gairdner). 
Goose Lake, Pitt River near Alturas, and Burney Creek. 
Catostomus occidentalis Ayres. 
Drew Creek, Muddy Creek, and Cottonwood Creek, in Lake County, Oregon; Goose Lake, Pitt 
River, in California. 
MEASUREMENTS OF SPECIMENS OF CATOSTOMUS OCCIDENTALIS FROM GoosE LAKE, CALIFORNIA. 
Pengthiof body. 22. 3- 22-2 see. eee eee mm. .| 255 265 235 248 190 236 255 222 222 
Dene th of head eas eee eteseen sone eee eens zeae 235 225 225 ~24 +235 226 -23 -23 - 235, 
Depthiof bodyzsen--- eee aeons 205 -20 - 205 -215 -195 21 -19 20 «225 
Snowtitoidorsaliyse ee cee se ense eee eee 50 - 495 - 485 -505 - 505 51 50 515 51 
Snouttonventraleces eee eseneeete see é 59 - 585 555 - 565 - 575 -57 585 ~575 545 
Depth of caudal peduncle..-.....-.......-.- -09 - 093 - 08 - 085 -09 - 085 - 085 -09 - O85 
Wildthiotlowerliphesesssssser esses aaa 05 - 055 - 045 -05 - 045 -05 045 -05 05 
Mengthtorsnoutacweccecastee ee eee cee eee A e12) 115 -115 -115 125 - 105 call -105 -115 
Dismeter\otievercn-. ces nce meee oe oe eee -| 035 - 035 04 - 04 04 -04 - 037 04 04 
Depth of head... 185 17 17 175 -17 165 17 17 165 
Height of dorsal. 155 165 165 18 165 155 175 165 175 
Height of anal. -.... Reet : 185 195 245 235 -175 19 185 195 ~215 
Dengthiot pectoral. 2-22 - sen ee ees : SO 1205) -22 21 -20 -21 -19 -215 ~215 
Wengithrohiventralee ess sas seeseeeee eee : 15 - 155 - 165 -17 145 -15 - 145 -155 16 
Ven p cho MCR UC oi Ba eee eee eee -| 23 -23 -23 23 245 -23 -225 «23 23 
Dorsalkraystec cece sees. eee ee E 12 12 1 12 13 12 12 ll 11 
Scales/otilateralilinesen-=-e=--=2-.-s=see ee -| 73 73 72 63 72 72 63 67 70 
Scales above lateral line....-..-......-... Al| 15 16 15 14 15 15 16 17 16 
Seales before dorsal ae 35 | 37 36 34 38 39 36 35 37 
Length of body. - 181 130 153 156 140 155 133 131 
Length of head. - 24 24 -235 25 -2 24 233 +24 $245 
Depth of body... 21 22 -23 225 222 22 215 -22 215 
Snout to dorsal. . 48 485 51 515 -50 51 49 -50 52 
Snout to ventral 555 58 57 585 -575 57 55 59 60 
Depth of caudal peduncle -|  .085 -09 - 083 - 085 - 08 -09 -08 -09 - 08 
Widthtomlowerlip. = 2a. << 2s5e----ne ee “ 05 - 065 04 - 045 05 - 055 - 045 047 - 055 
Length of snout... -| 11 115 10 12 ell ell 105 115 115 
Diameter of eye... y 04 +05 - 045 04 045 045 - 045 - 047 -05 
Depth of head. .-... - -17 -18 - 165 17 -18 - 165 - 155 18 -18 
Height of dorsal. . . 4 -175 19 -195 -18 -17 -18 - 165 +19 -18 
Height of anal-.... 2 185 -20 ~21 = 22 - 185 20 18 . 185 -20 
Length of pectoral. 3 21 22 225 23 22 21 195 20 22 
Length of ventral. - 15 17 17 165 -15 17 15 155 16 
Length of caudal. 235 | 25 255 265 -25 21 23 24 25 
Dorsal rays....-. -| 12 12 11 13 11 12 1 11 11 
Scales/ofilateraliliness 2 --2s=02-=5-e=—- a 67 | 65 66 67 65 63 66 70 64 
Scales above lateral line...........-.-.- . 16 16 | 15 16 15 15 17 15 15 
Scalesibeforeidorsali-jae seen eee eee eee ecee = | 32 | 35 | 36 37 36 33 38 34 32 
