186 BULLETIN OF THE BUREAU OF FISHERIES. 
appears to bear no relation to the armature of the preopercle:or to the condition and extent of the 
prickly investment of the skin. The skin is commonly smooth. A restricted axillary area of fine 
prickles is often present, being in some examples prolonged posteriorly to the origin of the anal. The 
lateral line is incomplete, ending at some point below the base of the soft dorsal. Rare exceptions have 
the lateral line complete or nearly so. The dorsal fins are generally joined by a membrane which 
extends about halfway up the first articulated ray. The width of the connecting membrane varies 
greatly and specimens are frequently met with in which it scarcely rises above the base of the first ray. 
The upper pectoral rays are occasionally branched. The color varies considerably, although some 
modification of the same general pattern is always preserved. Other slightly variable features, as the 
shape of body, the length of fins, number of rays, etc., are indicated in the appended tables. The 
variations here described are not greater than are commonly found among individuals of a widely 
distributed species, and while extremes of variation in certain characters may be seen among specimens 
of one locality, they are perhaps more often exhibited by examples from different basins. 
FIn CHARACTERS OF CoTrus GULOSUS. 
Bipsobence Number of rays Number of rays Number of rays 
orsal— in dorsal— in anal— in pectoral— 
Locality. 
6. | 7. | 8 | 9. | 16.} 17. | 18. | 19. | 20. | 12. | 13. | 14. | 15. | 16. | 18. | 14. | 15. | 16. | 17. 
| — 
Holmans Creek, Oregon...-.----.-------|---- TO lh Pad ese) bees| | abstlse Bate s2|/ 6 Mere) eee 
Klaskanine River, Oregon----.--- Sea eat Gh 2 I 4 19") 241 2 Soe) 22:1) 8} 
McKenzie River, Oregon......-.-.- See) | By) eee Neca), ah) eb) Shs bce! 4°) (au ates 
Nehalem River, Oregon.....-.-.--- eerste oreo | UL | eon | Eger |e | veer Sb ed 1 3/10} 2 1 
Tillamook River, Oregon....---- Sao) Hy bees at) My) ORY 3 14:)..6)|5-2 bee 
Siletz River, Oregon.-........... 2) 34S oe |F seo eal alee ole 3 4) 2). 
Deer Creek, Roseburg, Oreg....- el ak Bic oer reescl neces pee 56 |Eaasle 
Elk Creek, Drain, Oreg a |e i eed ees | eel | elie oS 4 || Soe 
Cow Creek, Oregon... ..- EEO seca) ase || abel este eal le 3 Bilbasels 
Coquille River, Oregon a Css 2) le 2a 7 5| 51}. 
Rogue River, Grants Pass, Ore ZAR 4) Mase) Gl) 28115 35)|) od | noaie 
Butte Creek, Oregon. .......- Saeed yb ees val ae: 2) 19 8) 1}. 
Bear Creek, Ashland, Oreg. 105] eo) | ee eel Ab On| [as lee 
Noyo River, California...........- 7 | 24 | De} 13) |) 23) 2|241| 7 21) S42 
South Fork Big River, California. - PAE Rese Asoo ol aulackal See AG Saas Wilsosclls 
Warm Springs Creek, California. - - aac |gGs| gees 3| 3 5| 1 Sh this 
Knights Valley Creek, California. - Boe aes || 202 asa ses pee | Fala G5 5| 9 
Napa River, California.......--. Saal) Clip Ay oat S|) Ed |p ate) 9 | 12 4/17 
McCloud River, Baird, Cal... Be ees Pee 5 ero | 4| 2 UN 5315 
Berryessa Creek, California. -.... aoe Sane eaod lee Late Zi le. 63) al Zileri 
Etna Springs Creek, California.......... ...- UM eck | HE leas 2)! Shi we 
| 
MEASUREMENTS OF CoTTUS GULOSUS. 
Columbia River basin. 
Skookumehuek A ; 
F Holman Creek, Klaskanine River, 
Creek, Chehalis, Ilwaco, Wash. Olney, Oreg. 
Wash. 
60 50 57 69 74) 71 69 66 71 74 72 60 51 
Length of body 
-300 | .64 | .38 | .33 84) 234 | 32 | .33 | .33 | .32 | .32 | 34 33 
Length head... 
Map thy bodyenie aessecemcn echoes 
Depth caudal pedunele....-.--.-- 
Length caudal peduncle. ...-.-.-.-- ee) he : : : : o : : A é 5 
Dengthysnouts -2 ee ee a le090i) LO) FoL0) jel0 200 |) 220) je OL (| tO. 0) S10) 5) LON | elOb RO 
Length maxillary el beg | 6 5 
Diameter'eye nei ensae. =e sere 
Interorbital width....-......-..- Salt 3 ° . . : C 6 5 ° 5 
Depthiherd: ee See elho74t FOO | -=205 PQ" i) SQV D0 Das TG OR ROS rei Ons | eer 
Snout to dorsal | 
Snouttojanal ee ee eee 
Length base of spinous dorsal. -- -165 | .16 
Length base of soft dorsal. ....-- 43 | .46 | .43 | .43 41 | .39 43 | .40 | .41 42 | .44 40 39 
Length base of anal-.......--..-- | 34 | 235. || «33 34 34} .32 31. | 233 34 33 | .34 335 33 
Height spinous dorsal.....-...---- Bene -115 | .12 11 10 | .10 09), |i ))) 2109 10 095 | .09 IL 
Height soft dorsal... -+-.--.----.-.- -| Si alee |) Gales | oaks 16 | .14 LBS enon | elo Tbs 155 16 
Heightiangl eee se: 2a ae BE Saeee |Peale et Giles heal! 15 | .14 14 14 | .14 14 | .125] .14 13 
Length pectoral 27 | 226 || .26 | -28 28 | .30 29 27 «| .28 27 28 27 = 28 
Length ventral. 21 21 - 20 | 20 oak 20 19 TE) allt) 19 20 21 21 
| 
| 
| 
| 
Mength\ caudal=.22-22eeese esse sees ‘ 26 | 127 | :24 
