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Agyijjpina hoaa 
(Text-fig. 4, h). The nuclei of both types of gamete appear to be of 
the same size, and are eccentrically placed (Text-fig. 4, h). The cyto¬ 
plasm is granular. No trace of flagellation has been discovered in either 
gamete. 
Fig. 3. Cyst showing lobulation of protoplasm. 
Fig. 4. Cyst with gametes, (a) Formation of gametes, [b] The two sorts of gametes. 
After the gametes have apparently been fully formed, the cyst may 
be watched for some hours without any movement being seen within it. 
It is a fair assumption that the gametes become mixed, so as to fuse 
each with a dissimilar one, but I do not know how the mixing process 
goes on. I have not seen the actual fusion of gametes, but Text-fig. 5, 
from a smear preparation of a cyst containing gametes, seems to show a 
stage in the fusion of two gametes. 
a ® 
Fig. 5. 
Fig. 5. Gametes from smear preparation (fixed). Possible fusion. 
Fig. 6. Cyst with zygotes. (Optical section.) 
S'pores. 
The zygotes are naturally rather larger than the gametes, and are 
at fii'st disposed round the surface of the cystal residuum (Text-fig. 6). 
Then, possibly as a result of amoeboid motion of that residuum, as 
Chatton suggests, they become included within it (Text-fig. 7), and 
a wall of dense protoplasm appears in.side the cyst-wall, whilst in the 
centre are numerous zygotes and irregular fragments of residual proto¬ 
plasm (Text-fig. 8). 
