C. Strickland 
105 
(Figs. 24 (d), 26). Fig. 25 represents a highly magnified view of this 
striated band. 
The details of the dilfierentiation of the endoplasm into spores are very 
difficult to make out either in the living parasites or in stained prepara¬ 
tions. Clear areas gradually loom up through the granular protoplasm, 
which is finally all used up, while the clear areas become more definite 
and finally resolve themselves into the highly refringent spores. When 
(a) (b) (c) id) 
Fig. 24. Cyst examined in vivo at stated intervals after being excreted from the larva. 
Fig. 25. The wall of the cyst highly magnified. 
Fig. 26. Showing the striated endocyst and the formation of spores. 
Fig. 27. Stained cysts showing method of dehiscence by rupture. 
fully formed, each spore is a refringent oval body containing eight 
minute rings of chromatin which are the nuclei of the eight enclosed 
sporozoites (Fig. 26). 
The spores are liberated by the simple rupture of the cyst at what 
seems to be a specialised area of its surface which protrudes and stains 
more deeply. The rupture of the cyst results in the formation of a 
distinct oval or circular hole (Figs. 27, 28) through which the spores 
