202 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
32. Cottus rhotheus (Rosa Smith). 
This stroEg'ly-markecl species is abimdaut in the Spokane region, and was taken at the 
following stations; Little Spokane River at Dart’s Mill near Spokane, and at Chattaroy, 
Wash.; Colnmhia River at Colvilie, M"ash ; C'cenr d’Alene Lake near Coeur d’Alene, Idaho; 
Clearwater River near Lewiston, Idaho; M'alla Walla River at M'allula, Oreg. ; Hangman 
Creek at Tekoa, M'ash. ; Natchess River at North Yakima, M"ash. ; Newauknm River near 
Chehalis, Wash. ; Snoqnalmie River at Snoqnalmie Falls, Wash. 
The salient features of this species are: (1) The pointed wedge-shaped protile of head, as 
viewed from above; this contrasting strongly with the usual broadly-rounded contour of other 
species. (2) The wide In.u’izoutal month, quite at lower profile of head. (3) The noticeably 
concave interorbital and occipital regions. (4) The very broad and long palatine baud of 
teeth. (5) The rather slender bod3^ and the extremely slender caudal jieduncle, the latter 
expanding fan-like at base of caudal fin. (6) The dorsals usually separate; when united, at 
extreme base onlj^. (7) Lateral line complete. (8) Sides usually well invested with prickles, 
which are triangular and coarse, and less closely placed than in asper. Thej^ are arranged 
more or less delinitely in oblique series. There is considerable variation in the completeness 
of the investment, and in one specimen from Chehalis an axillarj^ patch only is present. 
The specimens from Chattaroj^ and from Snoqualmie Falls are referred to this species with 
doubts as to their identity’. 
The following table will give an idea of the amount of variation in imudjer of tin-rays, 
found in this si>ecies ; 
Siiinou.? 
dorsal. 
Soft dorsal. 
Aiml. 
Pectoral. 
Locality. 
A’ll. 
via. 
1C 17 
11 
12 
13 
15 
10 
Lateral 
line. 
4 
6 
0 I 4 
3 
6 
1 
10 
32 to 84 
01 
2 1 
1 
1 
2 
32, 33 
2 
1 1 
1 
1 
o 
] 
0 
1 1 2 
1 
0 
3 
1 
1 
1 
1 
1 
5 1 
1 
4 
, 1 
1 
4 
3 2 
3 
o 
5 
1 
1 ' 
1 
1 
33. Cottu.s punctulatus (Gill). Jh-trc. 
Cottopsis semiscaher Cope. Hayden’s 5th Report, 1871, 476. Typo locality: Fort Hall, Idaho. 
Numerous specimens from Green River, Wyoming. Comparing these rvith typical seini- 
scaher from the vicinitj' of Pocatello, Idaho, we can appreciate no difference whatever, except 
in the matter of armature. None of our Green River si)ecimens show anj' prickles whatever. 
About half the Pocatello specimens are also naked and are indistinguishable from typical 
punctulatus; in the others more or less prickles are developed, varying from a few in axil of 
pectorals to a baud covering more tha)i half of the sides. As this is not an tmusual amount 
of variation, rve do not consider C. semiscaher worthj’’ of recognition. The relations of C, 
punctulatus with the eastern species have not been carefulljr worked out, and it seems best 
to recognize it for the present as distinct. Specimens from Green River, Wyoming, and from 
Mink Creek, Ross Fork, and Port Neuf River, Pocatello, Idaho. The collection contains also 
two specimens from Thonixison Falls and three from Flathead Lake, which seem to be this 
si^ecies. By the Fort Hall Indians this lish is called ali-we, a word meaning horns. 
34 . Cottus perplexus, sp. nov. (Plate 20.) 
Type locality: Skookumchnck River, near Chehalis, AVash., where 13 specimens were col- 
lecteil, August 28, 1893, by Drs. Gilbert and Jenkins. Associate type locality: Newaukum 
River near Chehalis, AA^ash.; 26 sx>ecimens, collected by Drs. Gilbert and Jenkins, August 28, 
1893, Tyx>e, No. 45387, U. S. Nat. Mus. Co-types, No. 45388 (Newaukum River), U. S. Nat. 
Mus. ; and Nos. 1324 to 1343 (Skookumchuck River), Museum Lelaud Stanford Junior Uni- 
versity. Related to Cottus punctulatus. 
