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differences in these chromosomes observable in most, if not all, of the 
mitotic figures (figs. 3-6). There are two of medium size, one large 
one, and two small ones, one of which lags (fig. 4) in the metaphase. 
After splitting the sister chromosomes swing into an end-to-end position 
(figs. 3, 4) as they move into the equatorial plate. 
The blepharoplast has in the meantime (fig. 3) divided into two, to 
Mitosis in Trichomonas augusta Alexeieff. X 1500; ant. fl., anterior flagella; ax., axostyle; 
&x. chr., axostylar chromidia; bas. chr. r., basal chromatic rod; has. gr., basal granule; bl., 
blepharoplast; ceftt., centrosome; chr. m., chromatic margin; cyt., cytostome; cyt. gr., cyto- 
plasmic granule; ex. chr. cl., extra-nuclear chromidial cloud; w., nucleus; p., paradesmose; 
post, fl., posterior flageUum; rh., rhizoplast; und. m., undulating membrane. 
Fig. 1. Active motile form prior to division. 
Fig. 2. Prophase, with chromatin skein, split border and sprouting flagellum. 
Fig. 3. Later prophase with five pairs of split chromosomes. 
Fig. 4. Late metaphase with blepharoplasts at poles, each divided into centrosome and 
basal granule. 
Fig. 5. Late anaphase with blepharoplast not divided. 
Fig. 6. Early telophase. Nuclei still connected by paradesmose. 
Fig. 7. Late telophase. Paradesmose seen end to end and therefore foreshortened, 
axostyle splitting. 
Fig. 8. Mitosis completed, cytoplasmic division approaching. 
Fig. 9. Nucleus and extra-nuclear motor apparatus after maceration. 
