378 



KOrOID AND SWEZV. 



PLATE 8. 



Plasmotomy after binary fission (Figs. 95-97) and multiple fission (M^;:- 

 98-104) in Eutrichomastix serpentis (Dobell). X 2175. All from Cwlalus 

 oregonus Holbrook except Figures 96, 98-100, which are from Pituophii> 

 catenifer Baird and Girard. 



Figure 95. Late telophase. Daughter nuclei diverging, plasmodesnose 

 taut. 



Figure 96. Daughter nuclei 180° apart in favorable position for plasmo- 

 tomy; paradesmose and axostyles parallel. 



Figure 97. Unequal division of cytoplasm in rounded-up phase about 

 daughter nuclei. 



Figure 98. Multiple fission, formative phase; second synchronous division 

 forming 4-nucleate Plasmodium; two paradesmoses present. 



Figure 99. Same stage with paradesmoses crossing. 



Figure 100. Somatella with eight nuclei. Three axostyles visible; nuclei 

 with intranuclear chromidial cloud. 



Figure 101. The same, with large karyosomes forming in the nuclei, proba- 

 bly an earlier stage than Figure 100. 



Figure 102. Disintegrative phase, 6-nucleate somatella. 



Figure 103. The same, 3-nucleate sometella. 



Figure 104. Binucleate stage, a late stage of binary fission or of the dis- 

 integrative phase of multiple fission, the seventh and eighth 

 merozoites in the last phase of plasmotomy. 



