40 



WM. A. KEPNER AND B. D. REYNOLDS. 



EXPLANATION OF PLATES. 



Plate I. 



Fig. i. Difflugia pyriformis. While at position A a fragment was cut off 

 and left with spherical contour at position w. As cell-body moved to posi- 

 tions B, C, D , E, F, and G, fragment w changed shape and travelled as an 

 ameboid body along path indicated by x, y, and z. z fused with the side 

 of the upper pseudopod of cell-body at G. 



Fig. 2. Diffluga spiralis. Fragment c cut off at 11:3s A.M. Fragments 

 a and b cut from two pseudopods synchronously at 11 130 A.M. These 

 fragments a, b, c now lay with reference to each other and to the cell-body 

 as indicated. In a little time a slender pseudopod of cell-body came down 

 by side of shell and a was appropriated. The cell-body was now dragged 

 six diameters of its shell to left from b and c. By 11:45 A.M. it had taken 

 up c. It was then disturbed with a glass rod; but at 11:45% A.M. it 

 had emerged and taken up fragment b. 



