PLATE XVI 
(Sire opposite pnj^e) 
1.2, 4. Cells of guinea fowl blood, resembling led cells 
but without haemoglobin. Possibly immature 
red ceils. They may be drawn out at each end 
as in 1 
3. Cell with young parasite in hollow of nucleus. This 
cell is much flattened on the film 
5. Young parasite in spindle-shaped cell 
6. Older parasite than in 5. Red staining line round 
the parasite well shown, and nucleus of parasite at its 
periphery appearing as if attached to line 
7. Male gametocyte with red staining line round its edge. 
In the same cell are two Plasmodia, one on the left 
with a single chromatin mass, the other on the right 
in the stage of schizogony 
8. Single cell infected with male and female gametocyte 
9. Young parasite in spindle-shaped cell 
10. Female gametocyte ' 
11. Constricted parasite with two chromatin masses or 
possibly two parasites, line of separation not clearly 
shown 
12. Immature male gametocyte showing well the red 
staining line around its periphery 
13. Young form in spindle-shaped cell 
14. Two young forms in one cell 
15. Two male gametocytes in one cell 
16. Parasite with two chromatin masses and lying in 
hollow of much enlarged nucleus 
I 7. Male gametocyte free in plasma some hours after death 
18. Female gametocyte free in plasma seme hours after 
death 
19. Young parasite in cell which is altered in film 
preparation 
20. Female gametocyte—nucleus of which shows well the 
karyosome. The host cell shows longitudinal lining 
which may be much more marked than here repre¬ 
sented 
21. 22, 23. Small forms of Trypanosome 
24, 25. Larger forms of Trypanosome 
26. Female gametocyte 
27. Fertilisation of female gamete by microgametes 
28. Trypanosome intermediate between large and small 
forms 
