Crustacean Life 



N 19 



PLATE I. 



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, 1916. 



43788 2J 



