348 



Janet W. Raff. 



place to one side instead of at the front end, and the protoplasm 

 Btreaniing towards that direction (text figure 1). 



Fig. 1 



While the amoeba is thus advancing, a remarkable movement 

 is going on in the posterior portion. It remains clear and jelly- 

 like, but puts out continuously numerous rounded pseudopodia 

 which merge into one another as soon as they are projected, and 

 are renewed incessantly, giving rather a mulberry-like appear- 

 ance (Plate LXXL, Figs. 1 and 2). 



At times each individual pseudopodium is not visible, the 

 whole forming a clear, oily-looking mass (Plate LXXI., Figs. 3 

 and 4). 



Another peculiarity of this posterior region is that it appears 

 to be able to act as a kind of sucker, anchoring the individual 

 down to some support from which it can extend in any direction 

 I have also observed egestion take place at this reo;ion. The 

 waste material is gradually discharged into it, and by the action 

 of the pseudopodia is ultimately egested. 



When the animal has been moving about for some time the 

 differentiation into anterior and posterior portions disappears, 

 and the amoeba becomes oval or spherical. This state of rest is 

 generally assumed by them soon after they are removed from 

 the intestine and put into saline solution, and one in this stage 

 killed in osmic A'^apour and stained in picro-cannine is represented 

 in Plate LXXL, Fig. fi. Tt measures aV)out 60/x in diameter. The 



