NO. 3534 EURYTEMORA — WILSON AND TASH 575 



including the Chukchi seacoast south to about Cape Krusenstern, 

 Euryiemora is known from scattered locahties along the Beaufort and 

 Chukchi seacoasts to about 65 miles inland. The nine Arctic Slope 

 species include those of inshore-offshore waters (E. americana, herd- 

 mani, pacijica) which have been found at least once in a body of 

 water on land. The species composition of the tAvo large lagoons 

 south of Cape Thompson at Kivalina and Cape Krusenstern, studied 

 by Heron (1964), is similar to that of some lagoons at Cape Thompson 

 except that E. americana was present and E. canadensis was absent 

 from Heron's samples. Further exploration of fresh waters may add 

 to the Arctic Slope list the tenth species known from Alaska, E. 

 yukonensis M. S. Wilson (1953a). The northernmost record of this 

 species is just southeast of Cape Thompson in the Noatak River 

 watershed (above, p. 564). 



Four Cape Thompson species are recent additions to North 

 American fauna. In addition to E. arctica described above, E 

 foveola was described from Cape Thompson lagoons by Johnson 

 C1961). E. raboti ranges from Spitzbergen and the Siberian coast to 

 the Barrow region, Alaska, where it has been found in collections of 

 J. L. Molir and associates, made in 1953 in brackish ponds (Wilson 

 collection) and in 1960 in Nuwuk Lake (Mohr et al, 1961). It was 

 collected in 1961 from Sinclair (or Minga) Lake, east of Barrow, by 

 Holmquist (1963). It was first recognized in North American waters 

 by Heron (1964) in 1959 samples from Krusenstern and Kivalina 

 Lagoons. E. gracilicauda, another Asian species new to North 

 America, was described by Akatova (1949) from freshwater Siberian 

 lakes in the basin of the Kolyma River (about 69° N., 161° E.). 

 The Wilson collection has several samples of E. gracilicauda from 

 Alaskan fresh and brackish waters, ranging from the Arctic Slope 

 south to the Alaska Peninsula; figm-es and notes are in manuscript to 

 be published elsewhere. 



Literature Cited 



Akatova, N. A. 



1949. Zooplankton Reki Kolymy i ee basseina. Uchenye Zapiski Lgu., 

 no. 126, Ser. Biol. Nauk [Sci. Rep. Univ. Leningrad, no. 126, Biol. 

 Sci. Ser.], vol. 21, pp. 341-367, 5 figs. [In Russian.] 

 Carpelan, Lars H. 



1964. Effects of salinity on algal distribution. Ecology, vol. 45. no. 1. 

 pp. 70-77, 3 figs. 

 GuRNEY, Robert 



1933. British fresh-water Copepoda, vol. 3, 384 pp., figs. 1196-2061. Lon- 

 don: Ray Society. 

 Heron, Gayle A. 



1964. Seven species of Eurytemora (Copepoda) from northwestern North 

 America. Crustaceana, vol. 7, pt. 3, pp. 199-211, 26 figs. 



