PLATE 3 
EXPLANATION OF FIGURES 
9, 10, 11 ij, margin of a mass of detritus by which a Paramecium was lying. 
9, shows ameba advancing toward Paramecium; 10, ameba sending pseudopods 
a and h forward until they made contact with detritus, after which they were 
moved apart and enlarged. In the meantime a pocket was formed within the 
body of the ameba into which the Paramecium moved as it moved to positions 
2 and 3. X 200. 
12 A ciliate being captured by pseudopods a, b, c, d, while a Euglena has 
been grasped as it was retreating from a forming food vacuole. X 200. 
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