PLATE 23 

 All figures on this plate were drawn from life. 



Figs. 107-113. An amoeba emerging from a cyst. The process figured 

 required seven minutes. In figure 111 the amoeba flowed back a little before 

 continuing its emergence. X 1730. 



Fig. 114. Empty cyst showing pores. The pores appear in succession on 

 focussing down. X 2000. 



Figs. 115-118, 121. Successive positions of a small mass of agglomerated 

 amoebas. X 846. 



Fig. 119. A typical amoeba in exflagellating material. 



Fig. 120. An exflagellation stage with the flagella on one side. Figures 

 119, 120, 122, 123, X 1154. 



Fig. 122. The same as figure 120. 



Fig. 123. A typical flagellate from the same material. 



Figs. 124, 126. Two successive aspects of a large agglomerated mass of 

 amoebas. X 846. 



Fig. 125. An agglomerated mass of amoebas two hours and thirty-five min- 

 utes after disturbance in the flagellate stage. Most of the amoebas of the 

 preparation collected in this mass. X 46. 



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