C. Strickland 
235 
REFERENCES. 
Chatton, E. (1909). Sur un trypanosomide nouveau d’une Nycteribie, et sur les 
relations des formes Trypanosoma etc. Comp. Rend. Soc. Biol. lsvi. pp. 
981, 982. 
Hindle, E, (1910). Degeneration phenomena of Trypanosoma gamhiense. Parasi¬ 
tology, III. 2ip. 424-435. 
Ncttall, G. H. E. (1910). The degenerative appearances observed in Piroplasma 
canis and Trypanosoma hrucei etc. Parasitology, iii. pp. 203-210. 
Patton, W. S. (1908). Report of the King Institute, Madras. 
Prowazek, S. (1904). Die Entwicklung von Rerpetomonas etc. Arh. a. d. Kaiserl. 
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EXPLANATION OF PLATES VIII-IX. 
PLATE VIII. 
Figs. 1-6. Forms found in the ‘crop.’ 
Fig. 1. Oval form without flagellum. The chromidia are scattered throughout the cell. 
The blepharoplast is at the extreme posterior end. It can hardly be seen in the flgure. 
Fig. 2. Oval form without flagellum. Nucleus slightly chromatinised. 
Figs. 3-6. Oval forms with flagellum. 
Fig. 3. Shows the blepharoplast dividing, and a single flagellum. 
Fig. 4. Shows the cell with the rhizoplast undivided and the flagellum with two chromatin 
filaments, between which is stretched the kinetoplasmic membrane. 
Fig. 5. Shows the rhizoplast divided, as well as the ‘ double ’ flagellum. 
Fig. 6. A densely staining form in which the nucleus cannot be seen. 
Figs. 7-22. Forms found in the hindgut and rectum. In all the cytopharynx is well- 
marked, but the nuclei are badly marked in the figures. 
Fig. 7. Large oval form with small chromidia. 
Fig. 8. Shows the chromidia in a group at the posterior end of the cell. 
Fig. 9. Shows the nucleus, blepharoplast and flagellum all more or less dechromatinised. 
Figs. 10-14. Round forms. 
Fig. 10. Shows commencement of the formation of the cytopharynx, the blepharoplast 
lateral to the nucleus. 
Fig. 11. Shows well the blepharoplast at the posterior end of the cytopharynx. The 
nucleus shows one of the stages of mitosis. 
Fig. 12. Partial retraction of the cytopharynx has occurred. 
Fig. 13. The chromidia are grouped at the posterior end of the cell. The rhizoplast is 
still chromatinised. 
Fig. 14. Shows the differentiation of the protoplasm into periplast and cytopharynx. 
Figs. 15-22. Oval forms with a flagellum. They all show the further differentiation of 
the protoplasm, and the consequent formation of the truncate end of the cell. The 
flagellum is short in all cases and is nearly dechromatinised; it cannot be seen when 
