414 WILLIAM A. KEENER AND WILLIAM H. TALIAFERRO. 



men in observing it the left pseudopodium alone grew. As it 

 elongated it travelled along the inner side of the right pseudo- 

 podium to its base. At the base of the right pseudopodium the 

 growing left one turned along the surface of the body and then 

 travelled "anteriorly" until the prey was entwined by it. When 

 thus the enclosing space had been greatly reduced the left pseudo- 



TEXT-FIGURE i. Outline of an Amoeba proteus, showing the manner in which the 

 pseudopodium a developed along the outer side of a Chilomonas. Eventually the 

 apex of the developing pseudopodium, a, fused with the body at b. In this manner 

 the Chilomonas was taken into the body of the Amoeba. (The position of the axis 

 of the Chilomonas was not observed. The point of contact of the Chilomonas 

 with the surface of the Amoeba was likewise not noted.) 



podium fused along its two margins at the place indicated in Fig. 

 i, e by a broken line. 



These observations led us to make further studies on the 

 food reactions of Amceba proteus. An Amceba proteus with two 

 pseudopodia projecting and flowing for the most part into the 

 larger one came in contact with a quiet Chilomonas paramcecium 

 (Fig. 2). The Chilomonas paramcecium, thus disturbed, retreated 

 to the position indicated by the finely stippled outline (Fig. 2). 

 Again the pseudopodium came in contact with the Chilomonas 

 and the latter then retreated to the position indicated by the 

 darkest contour. As the Chilomonas lay in this position the 

 Amceba proteus approached it and this time without disturbing 

 the flagellate sent protoplasmic processes about its sides until 

 the prey was enclosed within a food vacuole. This observation 

 does not depart greatly from what has been generally described 

 as the usual reaction of Amceba proteus to food. 



