SPOROZOA 



421 



parasite occurs in the capillaries of the internal organs. The 

 cycle probably requires 48 hours for its completion. The ery- 

 throcyte is not enlarged by the growth of the parasite within 



FIG. 193. Plasmodium falciparum. Stages in the development of the gametocytes 

 (crescents). X22oo. (After Doflein.) 



it, but tends rather to become smaller. Maurer has observed an 

 irregular granulation of the erythrocytes. Why the cells con- 



i . .... 



F em e c I F em e c I 



FIG. 194. Sections through the stomach wall of Anopheles showing stages in 

 the development of PI. falciparum. A, Fixed a few hours after the infective feeding, 

 showing ookinetes within the lumen and two in the cuticula of the epithelium. 5, 

 Fixed a few days after the infective feeding, showing the partly grown oocyst in the 

 stomach wall. F, Fat surrounding the stomach; em, tunica elastico-muscularis; e, 

 epithelium; c, cuticula; I, lumen of stomach. 



taining the larger forms should remain in the internal capillaries 

 of the body is not definitely known. 



The gametocytes develop by the growth of ordinary merozoits, 



