Abstract
The systematic status of ciscoes of the Coregonus autumnalis complex in Alaska and northwestern Canada is discussed. Two forms of "autumnalis" ciscoes occur in this area: a form with 26–30 gill rakers on the lower limb of the first gill arch is found in the Beaufort and Chuckchi Seas, and a form with 21–25 gill rakers on the lower limb of the first gill arch is found in the Gulf of Alaska, the eastern Bering, and the Chuckchi Seas. Both forms occur along the arctic coast of Alaska, apparently without intergrading, and therefore are considered valid species. The form with the high gill raker number is Coregonus autumnalis (Pallas) (sensu stricto), and that with the low gill raker number is Coregonus laurettae Bean.
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