Figure 1 



This figure, which was drawn from life, at a magnification of about 500 

 diameters, portrays a large specimen of the primitive, unicellular animal, 

 Amoeba, moving along filaments of the common, green, water-living plant, 

 Spirogyra. At the time the figure was drawn, the animal was moving down- 

 ward along the vertical strand at the right of the figure as is indicated by the 

 large, protruding pseudopodium. At the lower left, a related species, the 

 beautiful Sun-animalcule, Adinophrys, is shown. 



21 



