() PHYSIOLOGY OF MTSCI.KS AM> M.KVKS. 



tion in this case occurs in two ways. Sometimes single 

 processes are seen to protrude from the whole mass; 

 thc-e processes gradually affect the whole granular 

 mass, so that the whole body is displaced, and a genuine 

 change of position happens to the animal ; or the pro- 

 cesses being again retracted, other similar processes are 

 protruded from another part of the body, in such a wav 

 that the direction of motion is changed ; in short, the 

 animal creeps about on the glass plate on which it is ob- 

 served by means of these proc<>---. .Meanwhile currents 

 of granules can be seen within the mass; closer obser- 

 vation, however, shows that the motion in this case is 

 only passive, and that it is the result of a continuous 

 wave like displacement of the protoplasm. 



1 



Fit;. I. AAKKII.K. 



n. Anni-ti:i vi -rrnci'i-;!. /. Anm-l a |irnvta. 



."). .Movements entirely similar to those in these 

 independent living animal>, called Aiunhn, occur in 



