SPOROZOA 



409 



provided with two flagella. The female cells, macrogametocytes, 

 enlarge slowly and produce numerous yolk-like granules in their 



A 



D 



FIG. 178. Cyclospora caryolytica. A, Female cell (agamete) within the host 

 nucleus. B and C, Multiple division. D, A free young female agamete. (From 

 Dofldn after Schaudinn.) 



cytoplasm. The nucleus undergoes two reduction (maturation) 



divisions, and one daughter nucleus remains while the others 



A BCD 





II 



FIG. 179. Cyclospora caryolytica. A, Fertilization. B, Fertilized cell. C, Fer- 

 tilized cell (oocyst) with cyst wall. D, E, F and G, Division of the cyst contents to 

 form two spores, each containing two sporozoits. H, Escape of the sporozoits. 



(From Doflein after Schaudinn.} 



disintegrate. Several microgametes penetrate the matured macro- 

 gamete and one of them unites with the nucleus. A cyst wall 



