Plankton Crustacea from the Thelon Watershed, N.W.T.

HERE are but a few plankton collections from the north-central portion of the American continent.Arctic and subarctic fresh-water plankton has been taken sporadically from lakes along the coast of the Northwest Territories, the Yukon and Alaska (Marsh 1920, Juday and Muttkowski 1915, Juday 1920).Later Hooper (1947) collected mainly in waters accessible from the Alaskan Military Highway at stations in Northern British Columbia, the Yukon Territory and Alaska.At present the work of Wilson (1951) at the Arctic Health Research Center of the U.S. Federal Security Agency is, in part, concerned with the distribution of northern fresh-water microcrustaceans.