116 
Herpetomonas and Critludia 
The nuclear division proceeds in the ordinary way, the central 
chromatic granule dividing first (Diagram Ill, Fig. 4), the rest of the 
nucleus afterwards (Figs. 5, 6). 
The division of the blepharoplast is interesting and deserves a little 
more attention (Diagrams III and V). During cellular division the 
blepharoplast becomes larger and the chromatic granules are often 
multiplied (Diagram III, Figs. 3, 5, 6). Then longitudinal division 
begins (Diagram III, Fig. 4 ; Diagram V, Figs. 1-6); the blepharoplast 
Diagram V. Cellular division in Herpetomonas caUipJiorae. 
1-6. Division of the blepharoplast. 
7. Nearly completed cellular division. 
becomes V-shaped, the two daughter-blepliaroplasts forming the arms 
of the V, which afterwards become separated from each other. If the 
granules in the blepharoplast are divider!, the two daughter-blepharo- 
plasts generally receive each a part of the chromatic substance 
(Diagram V, Figs. 2, 3, 5). But often the distribution of the 
chromatin is not so regular, so that one blepharoplast holds all the 
granules and the other none (Diagram V, Figs. 1, 4-6). Afterwards all 
the blepharoplasts in the dividing cells are found to contain granules ; 
it might therefore be assumed that the latter can be regenerated. One 
might also be tempted to compare these granules in the blepharoplasts 
with nuclear karyosomes, but their irregular behaviour renders such a 
comparison doubtful. 
