428 WILLIAM A. KEPNER AND WILLIAM H. TALIAFERRO. 



EXPLANATION OF PLATE III. 



FIG. 6. (a) The Chilomonas first lay at the apex of the pseudopodium. As the 

 pseudopodium advanced it glided by the Chilomonas so that the latter lay to the 

 right in contact with the ectoplasm at the point indicated by position 2. (b), (c), 

 and (d) show the wave-like character of the reaction. This reaction crowded or 

 dragged the passive prey down into the fundus of the interpseudopodial space 

 where the Chilomonas was enclosed in a vacuole formed by the fusion of the apex 

 of the lateral active pseudopodium and the base of the right, inactive pseudopodium. 

 Xi66. 



FIG. 7. The large pseudopodium of Amceba came in contact at its apex with 

 the Chilomonas (i). The Chilomonas was then pushed to position (2). The 

 pseudopodium next advanced beyond the prey and turned to the right at (a) 

 along its upper side. At the same time a secondary pseudopodium was thrown out 

 at (b). Later this reaction on the part of the Amoeba was changed; the pseudopo- 

 dium at (&) was withdrawn and one thrown out at (c) to better meet the con- 

 ditions necessary for the capture of the prey. Pseudopodia (a) and (c) then grew 

 around the Chilomonas and enclosed it in a food vacuole. X333- 



