84 THE INVERTEBRATA 



young on invading a host cell grow into adults unlike their parents 

 and of two kinds — male and female gamonts. Each female gamont 

 extrudes stainable matter from its nucleus and thus becomes a 



Fig. 74. A diagram of the life cycle of Eimeria schubergi. A, Infection of a cell 

 of the intestinal epithelium of the host. B, Growth of the agamont. C-E, 

 Agamogony (schizogony). F, G, Gamogony. H, Conjugation (syngamy). 

 I-L, Division of the encysted zygote into sporoblasts. M, Division of each 

 sporoblast within its cyst into two sporozoites. The oocyst containing the 

 sporocysts is passed out of the host and swallowed by another. N, Escape of 

 the sporozoites in the intestine of the new host. 



female hologamete. In the male gamont the nucleus divides several 

 times, and the daughter nuclei are set free with portions of the cyto- 

 plasm as biflagellate male gametes, which are thus merogametes. 



