2Q8 ELERY R. BECKER. 



EXPLANATION OF PLATE. 

 X ca. 1950. 



FIG. i. Chilomaslix magnet, free form, showing a tuft of cortical projections in 

 flagellar region, and dorsal view of the cytostomal structures. Large granular body 

 dorsal to cytostomal organelles is the "parabasal body." 



FIG. 2. Chilomaslix magna, free form, dorsal view with "parabasal body" 

 apparently following right supporting fiber of cytostome. 



FIGS. 3, 4, 5. Chilomastix magna, free form, in division. 



FIG. 6. Chilomastix magna, cyst. 



FIGS. 7 TO 11. (Not according to scale.) Various nuclear appearances found 

 in Chilomaslix magna. 



FIG. 12. (Not according to scale.) Dorsal view of nucleus, integrated fibrillar 

 system and cytostomal structures of Chilomaslix magna. 



FIG. 13. Trichomonas muris var. cilelli. 



FIG. 14. Trichomonas muris var. cilelli, dividing, nucleus in anaphase. 



FIG. 15. Trichomonas muris, prophase nucleus of Trichomonas muris showing 

 six chromosomes. 



FlGS. 16, 18. Telratrichomaslix cilelli, free forms. 



FIGS. 17, 19. Trichomonas sp.? Individual in Fig. 19 infected by a Sphcerila. 



FIG. 20. Hexamitus pulcher, side view. 



FIG. 21. Hexamitus pulcher, front view. 



