Jordan and Evermann. Fishes of North America. 1913 



brown, marbled with yellow; dorsal, caudal, and pectoral fins with nar- 

 row black transverse bauds ; a dark spot on the pectoral fin near its base ; 

 anal and ventrals colorless. 



Concerning its occurence in Alaska, Dr. Gilbert observes : 

 " Not hitherto recorded from Pacific waters. Our specimens are more 

 constant in their characters than the Atlantic individuals reported on by 

 Collett (Den Norske Nord-Havs Expedition, 1880, 35). A definite narrow 

 band of line prickles extends along the upper edge of the dorsal series of 

 plates, usually occupying less than | the space between plates and base 

 of dorsals, and extending posteriorly to end of soft dorsal. Similar 

 prickles cover top and sides of head. The plates of the lateral lino 

 invariably extend to the root of the caudal fin, and the dorsal series to 

 the back of the caudal peduncle. None of the specimens before us has 

 plates along the base of the anal fin. The species differs conspicuously 

 from Icelus spiniycr and fcelns canaliculatus in having a deep pit on occi- 

 put, bounded laterally by high occipital ridges, each of which bears 2 

 rounded prominences or spines. The preopercular spines are longer and 

 sharper, and the bifurcation of the upper spine deeper than in the species 

 mentioned. In 2 individuals the upper spine is trifurcate, the branches 

 very long and curving upward. The fin rays in 6 specimens are as fol- 

 lows : Dorsal VIII, 20 ; IX, 19 ; IX, 21 ; IX, 20 ; IX, 20 ; IX, 19. Anal 16, 16, 

 15, 17, 16, 15. These average slightly higher than counts of Atlantic 

 specimens, none of which is at hand for comparison. The Pacific form 

 may prove specifically separable. The species is not abundantly repre- 

 sented in our collection. It was taken only within a limited area north 

 of Uniniak Island, in depths of 17 to 49 fathoms, at Albatross Stations 

 3250, 3252, 3253, 3254, 3255, and 3256." 



Arctic seas; circumpolar, if all specimens named bicornis and hamatus 

 belong to one species, which is doubtful. Spitzbergen to northern Russia, 

 Finland, Alaska, Labrador, and Cape Cod; abundant about Greenland in 

 2 to 100 fathoms. Length 6 inches. (Eu.) (bicornis, two-horned.) 



Cottus bicornis* REINHARDT, Vid. Selsk. Natur. Math. Afh., vm, 1833, 75, Greenland. 



Centridermichthys bicornis, GUNTHER, Cat., n, 172, 1860. 



Icelus bicornis, JORDAN & GILBERT, Synopsis, 693 ; GILBERT, Kept. U. S. Fish. Comm. 1893 

 (1896), 411. 



Icelus hamatus, KROYER, Nat. Hist. Tidsskr., I, 253, 1844, Belsund. in Spitzbergen; 

 GUNTHER, Cat., n, 172; GUNTHER, Challenger Report, xxn, 63; COLLETT, Norges Fiske, 

 35; COLLETT, Forh. Vid. Selsk. Christ., 14, 1880; COLLETT, Norsk Nordh.Exped., Fiske, 

 34, tab. 1, tig. 8; Nyt Mag. f. ]S T aturvid., xvm, 56, 1884; LUTKEN, Kara-Havets Fiske in 

 Dijmphna-Togtet, 123; LUTKEN, Vid. Met. Nat. For., 92, 1876; STROM, Norsk. Vid. Selsk. 

 Skrift., 18, 1884; LiLLJEBORG, Sverig. och Norg. Fiske, 164; DRESEL, Proc. U. S. Nat. 

 Mus. 1884, 252. 



Icelus furciger, MALM, Forhandl. Skand. Naturf., 9 Mote, 410, 1865, Bohuslan, Sweden. 



* According to Dr. Liitken, Cottus bicornis is identical with Icelus hamatus, this opinion 

 being based on a drawing of bicornis left by lleinhardt. Liitken also thinks that Coitus 

 polaris may be the same fish. Cottus polaris is said to have D. VI to VIII, 13; A. 14; 

 Cottus bicornis was said to have D. VIJI, 15 ; A. 14 ; while in Icelus hamatus, Collett counts 

 D. 7111, 19; A. 15; Liitken, D. IX, 19 or 20; A. U or 15. 

 3030 43 



