PLATE 3 



EXPLANATION OF FIGURES 



S Pelomyxa reacting to a paramaecium that lies above one of its pseudopods 

 and between two other pseudopods. X 100. 



9 Pelomyxa reacting to a Chilomonas that lies above the plane in which the 

 rhizopod is lying. X 100. 



10 Pelomyxa reacting to a paramaecium that lies below the plane in which 

 the rhizopod is lying. X 100. 



11 Pelomyxa capturing a Chilomonas that lies in the angle between the 

 body-proper of the rhizopod and a desmid. Pseudopod a, when it came in con- 

 tact with the desmid, was deflected to grow to b and then to c. X 100. 



12 Pelomyxa reacting to a small ciliate, that, coming along path shown by 

 arrow x, played to and fro against the inner side of pseudopod A between the 

 two lines against which small arrow heads lie. As the pseudopod was thus being 

 stimulated it widened to contour a-a and then to contour a' -a.' From this latter 

 contour two small pseudopods, b and b' were thrown out towards pseudopod B 

 and small pseudopod c arose from the mesial side of B opposite pseudopod b. At 

 this point the prey escaped along the path y. X100. 



404 



