Smithsonian Report, 1896. 



Plate XI. 



Locomotion 



$,y. 



i ■ a*:-r.- ■--■■■ 



■;-'.' r^,Vji 





Choice 



;--^-i 



"'"'.v. 





•bpi 



ifefSR 



IP c 



&J 



Nutrition 



&£ • 



Reproduction 





i^" 





Processes of Life Revealed by the Microscope. 



Fig. 1. The amoeba in its various phases of activity — locomotion, choice (irritability), nutri- 

 tion, and reproduction. The figures should be read from left to right, as with words in a 

 book, p, Pseudopod; c, crystal of substance distasteful to the amoeba, hence the amoeba 

 withdraws from it; /, food ingested and digested by the amoeba for its nourishment. The 

 indigestible matter (iv) is extruded from the body and left behind, n, Nucleus. This is seen 

 to divide first in reproduction, then the division of the cell body is completed, thus giving rise 

 to two individuals. 



