236 
Herpetomonas luciliae ii. sp. 
it becomes intracellular. The blepharoplast is always at the bottom of the cyto- 
pharyux and stains less deeply than the chromidia. 
Figs. 23-25. Cysts found in the rectum or ‘crop.’ The cytostome and micropyle are well 
seen ; also the characteristic position of the nucleus, blepiharoplast, and chromidia. 
PLATE IX. 
Figs. 1-14. Various forms of the flagellate found in the midgut. 
Fig. 1. Small cell in a resting condition. 
Fig. 2. Cell showing two free flagella, the rhizoplast slightly divided. 
Fig. 3. Cell in which the blepharoplast is dividing, showing the achromatic matrix. 
Fig. 4. Cell showing formation of a second chromatin filament, with a protoplasmic 
membrane (kinetoplasm) between the two filaments. Nucleus showing mitotic figure. 
Fig. 5. Cell showing division of the blepharoplast and rhizoplast; also the formation of a 
second chromatin filament. 
Fig. 6. Shows division in nucleus, blepharoplast and rhizoplast. Flagellum with one 
chromatin filament in a thick sheath of kinetoplasm. 
Fig. 7. Cell in which the nucleus shows mitosis ; the rhizoplast is divided and the 
flagellum contains two chromatin filaments. 
Fig. 8. The blepharoplast is dividing and the flagellum contains two chromatin fila¬ 
ments. 
Fig. 9. Cell showing complete division except between the two chromatin filaments. 
Fig. 10. Shows clearly the kinetoplasmfc membrane. 
Fig. 11. Flagellum twisted on itself. Ehizoplast and blepharoplast dividing. 
Fig. 12. Cell showing complete division of all the organella, but not of the cell protoplasm. 
Fig. 13. Complete division of all parts except the flagellum which is only split partially, 
both proximally and distally, new chromatin filaments being laid down by the side of 
the old. 
Fig. 14. Cell showing a further stage of division. The two cells have completely divided 
and the formation of the new chromatin filaments is continued. The respective 
rhizoplasts of the two daughter cells have divided. 
