 
 
|  Genus: Species: | 
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400 :
 150 μm; x 400 : 
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
E. elegans Ehrenberg: A colony composed of 32 or 64 cells in a smooth-layered gelatinous envelope 60-120 μm diam. Vegetative cells spherical, 8-10 μm diam., with 2 flagella, 1 chloroplast cup-shaped, 1 pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).