PLATE 5 
EXPLAXATIOX OF FIGURES 
16, 17, 18 Show process of constricting and stretching the Paramecium con- 
tinued, e and /, pseudopods advancing about a ciliate. As this small ciliate 
was being captured, the paramecium was released by the ameba. X 200. 
19 Shows the shape the living paramecium assumed after it had been released 
b}' the ameba and swam away. X 200. 
422 
