ATE V. 



PLATE V. 



FIG. 21. THE PARASITE OP MILD TERTIAN MALARIA. 

 Cycle I. (Schizogony). Asexual cycle in the human blood. 



a. Sporozoite entering red blood corpuscle and forming 



young trophozoite. 

 6. Young trophozoite in red blood corpuscle. 



c. Young trophozoite in red blood corpuscle, with accumulation 



of pigment. 



d. Large pigmented trophozoite. 

 ' . Mature schizont. 



/. Commencing segmentation of schizont. 



g. Further stage of segmentation. 



h. Segmented schizont ; formation of merozoites. 



i. Disintegration of red blood corpuscle, setting free the 



merozoites. 



j. Young merozoite entering red blood corpuscle. 



k. Macrogametocyte, or female sporont. 



I. Microgametocyte, or male sporont. 



Cycle II. (Sporogony). Sexual cycle in the mosquito, 



'ra. Microgametocyte. 



n. Macrogametocyte. 



Formation of microgametes from the microgametocyte. 



p. Free microgamete. 



q. Microgamete entering the macrogametocyte. 



jr. Zygote or ookinete. 



s. Sporocyst. 



t. Formation of sporoblasts in the sporocyst. 



u. Formation of sporozoites from sporoblasts. 



v. Rupture of sporocyst, setting free the sporozoites. 



to. Free sporozoites in the body fluid. 



i. Accumulation of sporozoites in the salivary gland. 



y. Sporozoites passing from gland duct into the blood of man. 



FIG. 22. THE PARASITE OF MALIGNANT MALARIA. 



a. Young trophozoite entering red blood corpuscle. 

 6. Do. in red corpuscle. 



c. Multiple infection of red corpuscle. 



f/. Multiple infection with chromatic stippling in cellular proto- 

 plasm ; a similar cell is seen lying beneath a, it contains 

 a pigmented trophozoite. 



d. Pigmented trophozoite. 



e. Segmented schizont, cluster of merozoites. 

 /. Macrogametocyte, " female crescent." 



g. Microgametocyte, " male crescent." 



A. Red blood corpuscle with chromatic stippling. 



i. Large mono-nucleated phagocyte containing malarial pigment 



