. Report upon natural history collections made in Alaska : between the years 1877 and 1881 . ey are common alsojust before ice makes in the large streams, and many are taken in gill-nets, although very few areever secured in fyke-traps for some reason. I also saw a number of Whitefish taken in gill-nets on the north coast of Siberia in August,1881, which I considered to be this species. In spring, during June, the Whitefish of various species run up the small streams. CoREGONUS NELSONii Bean. (Plate XX.) 29898. (243.) Nulato, Yukon River, March, , Yukou River. March,
. Report upon natural history collections made in Alaska : between the years 1877 and 1881 . ey are common alsojust before ice makes in the large streams, and many are taken in gill-nets, although very few areever secured in fyke-traps for some reason. I also saw a number of Whitefish taken in gill-nets on the north coast of Siberia in August,1881, which I considered to be this species. In spring, during June, the Whitefish of various species run up the small streams. CoREGONUS NELSONii Bean. (Plate XX.) 29898. (243.) Nulato, Yukon River, March, , Yukou River. March, , Yukou River, winter, , Yukou River, winter, , Yukou River, winter, , Yukou River, winter, , Yukon River, winter, , Yukon River, June, , Yukon R ver, June, , Yukon River, Juno, , Yukou River, winter, 1877-78. 29903. (249.) 32889. (110.) 32890. (111.) 32899. (107.) 32900. (108.) 32901. (109.) 32950. (308.) 32951. (309.) 32953. (311.) 32983. (106o.) < I. FISHES. 315 CoREGONUS QVADRiLATEEALis EicL. WLitefisb [Sigi of Eussiaus). 32854. (Go.) Nulato, Yukon Kiver, March, Whitefish.—Below white; sides to lateral line light flesh color, approaching with flue specks, which make the color darker: above lateral Hue olive with silvery and steelblue luster. Lower fius orauge shaded. Tail aud dorsals olive. 3-2855. (.50.) Unalakleet River, January 30, 1878. Slender Whitefish.—This specimen was obtained of a native, who said they were abundantat this; time (January 30, 1S7S) iu the river, but do not stay until spring. The lish is remarkablyslender, aud has a very pointed snout, which I have seen in no other whitefish. The color of theback is the usual olive and the ventral surface white. On the sides between the white and oliveaud underlying, but nearly disguising the latter color, is a band of salmon-reddish the entire len
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