I04 



PROTOZOA 



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

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

 fever {Hacmarnoeha malariae, Fig. 35, E-G), many in that of 



® ® 



@ ® # 



9 fj, 

 3S 





g^^EB 



^ . ^, 



1/ tz^^^ 



Fig. 35. — Lil'e-history of Malarial Parasites. A-G, Amoebula of quartau parasite to sporu- 

 latiou ; JI, its gametocyte ; I-M, amoebula of tertian parasite to sporulation ; iV. 

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

 tion ; U-\\\ maturation of oosphere ; A", fertilisation ; Y, zygote. a, Zygote 

 enlarging in gut of Mosquito ; b-e, passing into the coelom ; f, 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 Haemamoela, 



