HAEMOSPORIDIA 



601 



In. man. 



In. female 



anopheline 



mosquito 



Fig. 256. The life-cycle of Plasmodium vivax (Kudo), a, sporozoite en- 

 tering human blood; b, exoerythrocytic stage; c, the initiation of the 

 erythrocytic development; d, a young schizont ("ring form"); e-g, 

 schizogony; h, i, macrogametocytes; j, k, microgametocytes; 1, micro- 

 gamete-formation in the stomach of a mosquito; m, union of the gametes; 

 n, zygote or ookinete; o, rounding up of an ookinete in the stomach wall; 

 p, oocyst in which sporozoites are developing; q, mature oocyst ruptured 

 and sporozoites are set free in the haemolymph; r, sporozoites entering 

 the salivary gland cells. 



