66 Reproduction and Life-Cycles 



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Fig. 2. 8. AD. Mitosis in Aggregata eberthi; paramitotic type; x3790 

 (after Belaf). E, F. Long chromosomes in the dividing nucleus of Terato- 

 nynipha; x2400 (after Cleveland). 



The achromatic figure 



Both extranuclear and intranuclear achromatic figures have been 

 described in Protozoa. The extranuclear figure is sometimes represented 

 merely by the centrosomes and a paradesmose (156) which ranges from a 

 delicate fibril to a bundle of fibrils in different species (Fig. 2. 10, A-G). 

 The fibrillar paradesmose, as seen in Gigantomonas, differs mainly in 



