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CHAPTER II 



PROTOZOA (One-celled Animals) 



The Ameba 



Suggestions. — Amebas live on the slime found on submerged 

 stems and leaves in standing water, or in the ooze at the bottom. 

 Water plants may be crowded into a glass dish and allowed to 

 decay, and after about two weeks the ameba may be found in 

 the brown slime scraped from the plants. An ameba culture 

 sometimes lasts only three days. The most abundant supply 

 ever used by the writer was from a bottle of water where some 

 oats were germinating. Use } or } inch objective, and cover 

 with a thin cover glass. Teachers who object to the use of 

 the compound microscope in a first course should require a 

 most careful study of the figures. 



FIG. 9. —Ameba PROTEUS, much enlarged. 



