374 
The Schizogregarines 
Schizogony continues only for a limited period, the merozoites 
growing into new schizonts. Towards the end of this period, when 
the host begins to react upon the parasites, the schizonts grow but 
exhibit only a few nuclei, some two to four (Fig. 1, Vi, vii). These 
XVI 
f^4 
n 
i i 
' i 
i i 
»\<S^y'-Zyqote c, ' 
1^7 XI ^ 
Sporocyst Sporozoite 
cP 
o 
Schizonts, 
multinucleate 
-•-Soma 
xm 
^ or mycetoid - 
\ . 
Merozoite-- V 
O 
cq 
o 
v 3 
- Garnet ogony 
Schizonts 
paucinucleate 
or gregarinoid 
Association Gametocyte 
l 
I 
I 
<7\i 
& m 
vm 
ix 
Fig. 1. Diagram of the life-cycle of Ophryocystis (based on that of 0. Jiessei), after 
Leger (1907). Terminology altered. II—V, schizogony. VI—XIII, gametogony. 
XIV—XVI, sporogony. 
“ paucinucleate ” forms, the “ gregarinoid schizonts ” of Leger, finally 
break up into gametocytes or sexual individuals (“gamontes” of Leger). 
Each gametocyte (Fig. 1, vm) possesses only a single nucleus, and its 
growth goes on without further division until the parasite assumes a 
globular form (Fig. 1, ix) and becomes detached from the epithelium. 
It will be noticed that the growth of all the schizonts is extracellular 
and not within the living epithelium of the Malpighian tubule. This 
