188 BULLETIN OF THE BUREAU OF FISHERIES. 
37. Cottus klamathensis Gilbert. 
Specimens of this species from many widely separated localities in the Klamath system have been 
examined, and with scarcely an exception they have but one preopercular spine, below which the edge 
of the preopercle is entirely smooth. In rare instances there appears below the preopercular spine a 
small elevation not unlike that found in the uncommon, single-spined individuals of C. gulosus. A com- 
parison also of the dorsal fins of this species with those of C. gulosus shows that in C. klamathensis the 
dorsal more often has 7 spines and 19 rays, while in C. gulosus there are most frequently 8 spines and 17 
or 18 rays. ; 
Fin CHARACTERS OF 46 SPECIMENS OF COTTUS KLAMATHENSIS. 
6 letras 19 
| a | Pia ; : E | 13 | re Pe a6 
eat or- or- or- or- or- | dor- or- | pecto- pecto- pecto- 
Locality. sal | sal | sal | sal | sal | sal | sal eral ena anal ral bea Cal 
spines. spines.|spines.| rays. | rays. | rays. | rays.| ~"~* eAssb Peseae "| Tays. | rays. | rays. 
| | | | | i} 
| | 7 zi - | 
Shasta River, near Montague.) 1 | 23 | 2 1 | 7 16 | 2 5 19 73 | 3 23) | sees 
Shasta River, near Yreka....|.....-- 16 | Ce as cabe, 6 130 See 5 14 1 | 4 15 1 
| | | | 
MEASUREMENTS OF CoTTUS KLAMATHENSIS. 
Shasta River near Yreka, Cal. | Shasta River near Montague, Cal. 
| 75 68 | 57 61 57 73 65 55 65 71 50 
--| -325 | .32 | .34 -335 | .32 31 «31 32 -32 -32 -31 
orl -24 -25 -26 -21 -24 24 -26 -25 -30 -25 
-10 -10 -105 | .10 -10 09 -10 alk) -10 -ll -10 
Length of body. - 
Length head - 
Depthsbodyass-e--mee= 
Depth caudal peduncle. - . 
Length caudal peduncle.....................- 15 14 13 -145 | .14 4 -13 12 14 13 oils) 
engthsnouthstesae.- eee eee eee ll -10 -12 ll -10 +095} .11 mill -10 -105 | .10 
Tene thmaxillary.. = eee eee eee -145| .14 -15 -14 -13 -14 -145| .14 13 .14 13 
Didmo terieyet en mesos eee ee eee - 08 -07 08 -085 | .085 |) .085 | .08 -085 | .08 -08 085 
Tnterorbitals wid theese ss2--—easeeneeeae oe | .04 -04 -045 | .04 -05 +045] .05 -04 04 05 05 
Mepphihes dee eon ae yee aeeeeecer )} .21 +22 24 -215 | .20 +20 -21 21 20 21 20 
Snout to dorsal. nap enteperecesesSnEC ses! 37 - 38 -39 39 - 36 - 36 - 36 .37 -36 38 37 
Snoutto;anals wee 2 eee aes eae ene | .54 -60 | .60 nay! tive .54 .58 Bash al) Astyé 56 .59 
Length base of spinous dorsal... ......------ -16 -16 17 -16 -16 -17 -15 a Ay oles -18 16 
Length base of soft dorsal..............--.-- -39 43 43 41 -43 -46 -41 | 645 | 2425] .43 41 
Teng thibase\of anal s-- se=-= = ee sense -.| 33 -325 | .33 -335 | .33 31 33 35 33 =ol 32 
Height spinous dorsal...............-...-.-- | -08 -085 | .11 -08 -09 ll 09 -10 10 olll «ll 
Height soft dorsal......-.. -| .1385} .14 -13 -14 +15 15 14 6) dete -14 15 
Hleigth tana eee ees eee neee -125| .12 -13 -13 -14 -12 139) 213: | -13 -13 .12 
Weng thipectorall teens seen cece ae eeee ee sasees 27 -28 +28 -28 27 -28 -28 -32 -28 27 +27 
Weenie thisyen tree pereereere ee eee eee | -18 -18 -20 -19 SHY | ail) -19 -20 |} -185)} <9 -18 
Menge thvcania all Bet eersen ee aaen a eeee ee emits | 2 -22 +22 -23 +22 | .23 =22i 9) eo! i) a2 -22 22 
88. Cottus aleuticus Gilbert. 
This species has been hitherto recorded from the Aleutian Islands and Vancouver. Specimens 
were recently taken by Mr. A. W. Greeley in the Carmel River just south of Monterey Bay, the range 
of the species being thus materially extended. These and other examples secured at various points 
along the Oregon and California coast have been compared with the types of C. alewticus and appear 
not to differ in any respect. 
Usually the body is perfectly smooth, the palatines without teeth, and the preopercle with but 1 
spine. Spec mens from Maple Creek, California, were found to have a small axillary patch of very fine 
prickles and a second, minute, blunt spine on the preopercle. 
The species is not commonly found. It appears to be confined to the lower courses of the rivers 
near the sea, where it is often associated with C. asper. From C. asper and from C. gulosus it may be 
easily distinguished by its tubular nostrils. 
Specimens were collected in the following rivers: Tillamook, Trask, Nestucca, Yaquina, Coquille, 
Elk, Sixes, Pistol, Smith, Redwood, Mattole, Navarro, Alder, Garcia, and Gualala. 
