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



Plate III. 



Fig. 5. Difflugia spiralis. Fragment cut from a and dragged to position 1, 

 1500JK distant, where the fragment had a rod-like contour. Until cell-body 

 had moved through spiral curve along b, c, and to d, the fragment moved 

 about aimlessly through positions 2, 3, 4, 5, 6, 7, 8, (9 the solid black 

 outline not indicated by a numeral). The fragment and cell-body d now 

 travelled towards each other, the former along path 10, 11, 12, 13, 14, and 

 15, the latter coming to position e where the two masses of protoplasm 

 met. X 100. 



Fig. 5— A. a shows fragment, left at 15 in Fig. 5, now travelling down along 

 pseudopod towards a cup that had been formed; b union of fragment and 

 cup just completed ; c and d show the details of the end of this process 

 of restitution. X 250. 



Fig. 6. Difflugia pyriformis. Fragment b had moved from position b to x 

 towards mouth of shell A. Cell-body was now moved to position B without 

 disturbing either position or contour of x. Immediately after A was shifted 

 to B, x changed its course and travelled to y. Here, unfortunately, the 

 water had evaporated and in adding more water the fragment was lost. 

 X 250. 



Fig. 7. Difflugia spiralis. Two ectoplasmic fragments taken from an 

 individual and placed side by side as at m. Here both are shown as living 

 ameboid bodies. At w they are rounding up indicating the approach of 

 death. While at o each fragment has become almost spherical and shows 

 no signs of life. X 250. 



