104 



PROTOZOA 



CHAP. 



peatedly, and then the schizont segments into a flat brood of 

 germs (merozoites), relatively few in the parasite of quartan 

 fever (Haemamoeba malariae, Fig. 35, E-G), many in that of 



Fig. 35. Life-history of Malarial Parasites. A -G, Anioebula of quartan parasite to sporu- 

 lation ; H, its gametocyte ; I-M, anioebula of tertian parasite to sporulation ; N. 

 its gametocyte ; 0, T, " crescents " or gametocytes of Laverania ; P-S, sperm-forma- 

 tion ; U-W, maturation of oosphere ; X, fertilisation ; Y, zygote. a, Zygote 

 enlarging in gut of Mosquito ; b-e, passing into the coelom ; /, the contents seg- 

 mented into naked spores ; g, the spores forming sickle-germs or sporozoites ; h, 

 sporozoites passing into the salivary glands. (From Calkins's Protozoa, after Ross 

 and Fielding Ould.) 



tertian (H. vivax, Fig. 35, M). These brood-cells escape and 

 behave for the most part as before. But after the disease has 

 persisted for some time we find that in the genus Haemamoeba, 



