44 



AN INTRODUCTION TO ZOOLOGY 



In advancing the Amebcz " extend the anterior end free in the 

 water and attach it at or near the tip and then contract. At the 



FIG. 13. Photographs of Ameba proteus inside view to show method of loco- 

 motion. A, B, and C show a specimen attached at two points a and b; the 

 pseudopod projecting from one end bends down to the substratum as 

 shown in B at d ; C shows two more attached pseudopods at c and /, 

 and several free pseudopods at . 



