10 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The head is 3.9 to 4.2 in length. The barbels are conspicuous and constantly present. The max- 
illary reaches vertical from middle of nostril. The mouth is little or not at all overlapped by the 
snout. In adult males the paired fins are very long, the pectorals strongly overlapping the ventrals, 
the ventrals reaching to or beyond front of anal. In females of the same size, these fins fail to meet. 
In fourteen specimens examined the scales along lateral line are 70, 71, 71, 72, 72, 72, 73, 73, 74, 74, 74, 
76, 77, 77. The species seems to differ from A. nubila carringtoni only in the smaller scales. 
Numerous specimens were secured in Willow Creek, at Ager, California, and in Lost River. One 
specimen was taken in Upper Klamath Lake. 
11. Salmo gairdneri Richardson. 
Very abundant in Upper Klamath Lake and River; but few specimens obtained by us. These I 
am unable to distinguish from typical S. gairdneri, the larger specimens with the characteristic appear- 
ance of sea-run or landlocked fish, i. e., with few small spots and a truncate tail. Young specimens 
are also more silvery and with fewer spots than are found in S. gairdneri from coastwise streams. 
There is no patch of fine teeth at the base of the hyoid, nor any red dashes under the mandible. In 
five specimens examined, the scales are 134, 135, 136, 143, 146. As the California Fish Commission has 
operated on the Klamath River, it is not improbable that one or more species of trout have been 
planted there. 
12. Salvelinus malma (Walbaum). 
Reported by Cope from Williamson River; not seen by us. 
Gottus klamathensis Gilbert, new species. Drawn by Anna L. Brown from tbe type (No. 48226, G. S. N. M.) 
from Upper Klamath Lake. 
13. Cottus klamathensis, new species. 
Uranulea minuta Cope, Proc. Ac. Nat. Sci. Phila. 1883, 152 (Klamath Lake) ; not of Pallas. 
Type, No. 48226, U. S. Nat. Mus. ; Upper Klamath Lake near Klamath Falls, Oregon, June 12, 1894. 
(C. H. Gilbert, Frank Cramer, and K. Otaki, collectors.) 
A large, strongly matked species, very abundant in Upper Klamath Lake. It is characterized by 
its short, spinous dorsal, broadly joined to the long, soft dorsal, the unbranched pectoral rays, the 
very incomplete lateral line, the weak development of prickles, the lack of palatine teeth, and the 
distinctive coloration. It is most nearly related to C. perplexus. 
Head 2, 2 ff to 3-iV in length ; depth 3& to 4|. D. vu, 19 ; A. 14 ; P. 15 ; V. i, 4. 
Body heavy and deep, the head narrowed and wedge-shaped anteriorly, the snout rather acute, 
and the mouth with much lateral cleft. Maxillary broadly exposed, its tip reaching vertical from 
behind front of pupil, its length 2| or 2£ in head. Broad bands of teeth on jaws and vomer ; palatines 
toothless. Anterior nostril with a distinct tube. Eye of moderate size, 1} in snout, 4f to 5 in head. 
Interorbital space and occiput gently concave in adults, the total interorbital width 1J to 14 in orbit, 
the bony septum narrower. 
Upper preopercular spine robust, straight, directed backward, or backward and slightly upward. 
Below this the margin of the bone is without evident spines, but bears one or two slight prominences, 
which may be rounded or acute. Anterior angle of subopercle with a short spine directed forward; 
opercle ending in a short, flat spine. Head with large pores ; two pairs above front of orbit, those 
