n6 



AMEBOID MOVEMENT 



of these the ameba moved on with the reestablishment of the 

 wavy path. The tendency to wave formation evidently has to 

 overcome resistance of some sort. 



57 



28 



Figure 37. An illustration showing that sudden changes from the 

 expected direction of the wavy path are centrifugal, not centripetal; that 

 is, away from the focus of the wave, not toward it. The tendency to 

 break away from the first smooth wave became apparent at 3 145, as 

 indicated by the extension of pseudopods near 'the anterior end. In the 

 stage about two minutes later, a number of small pseudopods were thrown 

 out in various directions. At 3 148^2 several large pseudopods were thrown 

 out near the anterior end almost at right angles to the main axis, instead 

 of at an angle of about sixty degrees or less, as is the usual case. The 

 same thing occurred at 3:57, except that the angle of the pseudopod was 

 not so large. 



