INTRODUCTORY 



forms, macrogametes, of the coccidia. Again, in other 

 coccidial cells, when they have reached their maximum 

 stage of growth, the cell contents divide into a mass of 

 bodies smaller and more actively motile than the spores. 

 The small actively motile bodies are the male fertilizing 



FIG. i. Diagram of development of Coccidia. Endogenous life includes 

 the asexual cycle and the fertilization of the macrogamete by the microgamete. 

 The further development does not require an alternate host. It takes place 

 on the ground. 



elements equivalent to spermatozoa, and are known as 

 microgametes. When the cyst containing them ruptures 

 the microgametes are set free and penetrate through the 

 micropyle of the macrogamete and fertilize it. 



In the fertilized macrogamete, now known as the 

 oocyst, various changes occur and the micropyle is closed 



