Crustacean Life 



N 19 



Plate I. 



Fig. 1— Large freshwater lakes near Konganevik, Camden bay, Alaska. July 4, 1914. 



Fig. 2-Tundra pond overgrown with Hippuris, Carex. and Eriophorum on Herschel island, Yukon Territory, July 29, 1016, 



43788—24 



