FISHES OF THE KLAMATH BASIN. 
13 
smooth except for a postaxial band of prickles, and in one specimen these are absent, leaving the body 
entirely naked. Lateral line variously incomplete, interrupted at some point under posterior half of 
second dorsal. 
Color light olive with darker markings, which may on the head take the form of vermiculating 
lines. Seven quadrate dark blotches along base of dorsal fin, the first and third usually narrower 
than the others, an eighth on back of caudal peduncle. Very distinctly marked individuals show a 
series of blotches along middle of sides, which may be connected with the dorsal series by broad, dusky 
bars. Dorsal, caudal, and pectoral with faiut bars. Yentrals and anal unmarked. 
I subjoin table of fin rays in 12 specimens. 
Fins. 
No. of 
specimens. 
Spines 
or rays. 
] 
1 Dorsal spines 
3 
VI 
9 
VII 
Dorsal rays 
7 
21 
4 
22 
1 
23 
! Anal rays , 
2 
16 
17 | 
3 
18 
Pectoral rays 
1 
14 
11 
15 
Numerous specimens were obtained in shallow water along the shore of Klamath Lake, on a 
bottom of fine sediment and vegetable debris. 
This differs widely from any other species of Cottus in the very narrow, slender form, the long 
fins, and especially in the extreme development of the mucous tubes and pores. 
