PLATE XII 





Life-cycle of Plasmodium Vivax. (After Grassi and Sehaudinn.) 



The hurtian cycle is above the transverse line, somewhat rearranged by Kisskalt and Hartmann. 

 The cycle in the mosquito is beneath. 1 to 7, schizogony; 1, sporozoite; 2, entrance of the sporozoite; 

 3 and 4, growth of the schizont; 5 and 6, nuclear division of the schizont; 7, formation of the 

 merozoites; 8, merozoites; 9a to 12a, growth of the macrogametocyte; 96 to 126, growth of the micro- 

 gametocyte; 13c to 17c, parthenogenesis of the macrogametocyte; 13a and 14a, maturation of the 

 macrogamete; 136 and 146, growth of the microgamete; 156, microgamete; 16, fructification; 17, 

 ookinet; 18 to 20, entrance of the ookinet into the stomach wall of the mosquito; 20 to 25,sporogony; 

 22 and 23, nuclear multiplication in the sporont; 24 and 25, formation of the sporozoites; 26, passage 

 of the sporozoites to the salivary gland ; 27, salivary gland of the mosquito with sporozoites. (Magni- 

 fication, 4 to 17c, 1200 to 1; 18 to 27c, 600 to 1.) 



