1923] 



Swezy: Pseudopodial Method of Feeding 



395 



held quite firmly, a necessary requirement in the turmoil going on 

 around it if the animal is to feed at all. This appears to be done by 

 means of secretions of the ectoplasm at the point of contact. A small 

 pseudopod of clear ectoplasm may now be seen moving along the 



Fig. 4—9. Leidyopsis sp., drawn freehand from living specimens. Figure 4 

 shows beginning of process of ingesting food body. Figure 5 shows a somewhat 

 later stage. Note long clear pseudopod. Figures 6 to 9 give successive stages in 

 the ingesting of a food body, process occupying about one hour. Note clear 

 pseudopods creeping along wood particles. X 300. 



surface of the wood (fig. 4). The pseudopod maj'^ continue along 

 one side at first (fig. 6), or the ectoplasm may move out in a ring 

 around the particle, drawing it into the body by one end, dependent 

 apparently on the location of the point of its first contact. When 

 this point is at the side the pseudopods may extend in either direction 



