316 NAT DEAL HISTOEY (COLLECTIONS IN ALASKA. 



:W871. (47.) Nuliito, Yukon River, January, 1878. 



(Notes on original No. 47.) 



Grayling. — Nalato, Yukon, Alaska. Specimen brought frozen in January, 187S. Color, dull 

 purplish-brown, very dark, with traces of black spots along sides. Fins nearly black. Dorsal 

 greatly developed. Eye golden-brown. A light fleshy tint is apparent on the sides of head and 

 body about .shoulders. 



3->930. {\h-l.) AmU-aevsky, spring, 1H78. 



This is a fiesh-water species, straying occasionally into the bx-ackish water near the mouths of 

 streams on the Arctic coast or along the shore of Behring Sea. They are very common about 

 Nulato in spring, but are not numerous at other seasons. They are one of the characteristic and 

 common species in all the clear streams tributary to the Lower Yukon, and to Behring Sea and the 

 Arctic coast thence north. 



In midsummer, 1881, when hunting near Cape Lisburue, on the Arctic coast, I saw a number 

 of these fish in a small stream. They kei)t in the pools, and when I drew uear swam hurriedly 

 about, trying to escape. I watched them from concealment for some time, but did not see them 

 open the large banner-like dorsal fin either while they Avere unaware of my proximity or when 

 alarmed by me. This fin lay closely folded along the back in both cases. This fin is probably a 

 sexual character, as it can scarcely have a practical function. The creek where I found these Gray- 

 ling is a tributary of the Kowak River, which flows into Kotzebuc Sound. These fish are caught 

 by the Eskimo with small, brightly ornamented hoolis, and also in nets and traps of wicker-work. 

 The following is the description of the life colors of a fine male, which was written down directly 

 after taking the subject, with several others, from a fish-trap in Anvik Elver on Noveuiber 20: 



Scales, on the sides and back, with golden bronze reflections. On the sides, extending longi- 

 tudinally through the middle of each scale, is a bar of light color, thus forming a series of light 

 lines along the body. Extending back from the head for about half the length of the fish is a 

 straggling series of ten or fifteen black .spots, each covering about half of a scale. The ventral 

 surface diugy white, with irregular dingy dotting in minute points. From pectorals to veutrals on 

 each side extends a bar of from two to three scales in width of dark golden bronze, fading quickly 

 to brown after death. Back of ventrals this liue is to be faintly traced. 



In tine specimens, mainly on the posterior half, particularly near the tail, the body is shaded 

 with purple, bluish-green, and dark livid blue, the latter color covering the entire tail. This col- 

 lection of colors gives an iridescent appearance to the posterior part of the body. The anal fin is 

 colored a lighter shade of the same tint as the tail. Five narrow bars of pink extend diagonally 

 across the upper surface of the ventral fins from uear their bases to the outer borders ; these bars 

 show nearly white on the under surface of these fins. The ground color of these fins is diugy 

 bluish-green, puuctulate with minute white specks on the under surface. Pectorals dingy olive, 

 with a dark-purplish shade. Head olive-brown, with bright-bluish and greenish-purple reflections 

 from the opercula. Dorsal fin pur^jlish, darkest on posterior half. From front to back on the mem- 

 bi\ane of this fin extend five or six pretty regular series of light spots in so many rows. These spots 

 are small in front and larger posteriorly. Their color is light purple in front, but changes i»osteri- 

 orly to bright purplish, red, green, indigo, and violet, sometimes blending and sometimes separate, 

 so as to form a beautiful combination difiicult to describe. 



The fin on its posterior half also becomes much more intensely colored with shades of greenish 

 and purple. The upper and outer border of this flu is narrowly edged with pink. It is impossible 

 to convey by description the beautiful array of colors this species presents when first taken from 

 the water, most of which quickly fiide after death. 



Stenodus MACKENzn Eichardsou. Whiteflsh (^"t'//H(( of Eussiau ; CVuofEsk.) 



29888. (-239 ana 240.) Kotlik, January 20, 1681. 



Nehna, or Large Whitefish. — Lower half silvery white, and shaded by dusky olive on upi)er 

 half. Lower fins pale or colorless. Upper fins dusky. 



29889. (25.5 and 356.) Nulato, March, 1881. 



xV. native brought one of these fishes from Selawik Lake this winter (1S30-'S1), which weighed 

 forty-odd pounds and was nearly 4 feet long. 



