PHYLUM PROTOZOA 



57 



afterwards escape into the cavity of the seminal vesicle and 

 grow into the adult form. 



All the Sporozoa are parasitic, and all are characterised by 

 the absence of pseudopodia, flagella and cilia, and of mouth 



and gullet, and by the formation of spores enclosed in 

 chitinoid coats. Gregarina (Fig. 24) differs from Mono- 

 cystis in having the medullary part of the protoplasm divided 



