MORPHOLOGY IN TRICHOMONAS TERMOPSIDIS. 



81 



plasts by means of rhizoplasts (Fig. 4, C). As the blepharoplasts 

 become separated, one remains with the old chromatic basal rod, 

 retaining two of the original flagella, the old undulating mem- 

 brane, and one of the nuclear rhizoplasts. It completes its 

 locomotor apparatus by growing out two new anterior flagella. 

 The other blepharoplast takes two anterior flagella and the other 

 nuclear rhizoplast, but immediately starts to equip itself with 

 two new anterior flagella, and a new chromatic basal rod, comple- 

 mented by a new undulating membrane (Fig. 4, C and Fig. 3, B). 



C 



FIG. 5. A. Chromosomes have straightened themselves out and are seeking the 

 polar extremities of the paradesmose they are still on the subparadesmosal fiber. 



B. Chromosomes beginning to congregate at the polar ends of the paradesmose. 



C. Chromosomes grouped in rosettes at ends of paradesmose, and beginning to 

 pull apart. 



D. Chromosomes still in rosette formation, but widely separated, and ready to 

 reorganize. 



