DESCRIPTION OF FIG. 82. 



Life history of malaria parasite, Plasmodium. i, Sporozoite, introduced 

 by mosquito into human blood, the sporozoite becomes a schizont; 2, young 

 schizont; 3, young schizont in a red blood corpuscle; 4, full-grown schizont; 

 5, nuclear division; 6, spores, or merozoites, from a single mother-cell; 7, young 

 macrogamete (female), from a merozoite, and situated in a red blood cor- 

 puscle; ya, young microgametoblast (male); 8, full-grown macrogamete; 8a, 

 full-grown microgametoblast; 9, mature macrogamete; ga, mature micro- 

 gametoblast; 96, resting cell, bearing six flagellate microgametes (male); 

 10, fertilization of a macrogamete by a motile microgamete; the macrogamete 

 next becomes an ookinete; n, ookinete, or wandering cell, which penetrates 

 into the wall of the stomach of the mosquito; 12, ookinete in the outer region of 

 the wall of the stomach, i.e., next to the body cavity; 13, young oocyst; derived 

 from the ookinete; 14, oocyst, containing sporob lasts, which develop into sporo- 

 zoites; 15, older oocyst; 16, mature oocysts, con taming sporozoites; 17, transverse 

 section of salivary gland of an Anopheles mosquito, showing sporozQites of the 

 malaria parasite in the gland cells surrounding the central canal. 



1-6 illustrate schizogony (asexual production of spores); 7 16, sporogony 

 (sexual production of spores). 



(FOLSOM After GRASSI and LEUCKART, by permission of Dr. Carl Chun.) 



