t'iG. IOf. 



*- ' 



II 



Life Histoky of the Malaria Parasite. 

 exotospore, or malarial germ, as introduced into the blood by the mosquito ; b, exoto- 

 spore after entry into blood corpuscle ; c, growth of exotospore into an amcebula ; 

 d, division of ama-bula to form enhsemospores ; e, liberated enhfemospores ; /, gi-owth 

 of enhsemospore into a crescent at expense of corpuscle ; g, male, and h, female 

 crescent ; i, male cell with projections, which lengthen, and are eventually set free 

 as spermatozoa ; j, fertilisation of ovum by spermatozoon ; Ji, fertilised egg as the 

 active motile vermicule ; I, enlarged vermicule, after boring through the stomach 

 wall of the mosquito, forming the sphere ; m, segment of sphere at maximum stage 

 of development, containing countless needle-shaped spores, which, when it bursts, 

 escape as exotospores into the organs of the mosquito's body and pass through the 

 salivary glands into the proboscis, and so infect a man bitten or pricked by the 

 mosquito. (The figures are taJien from enlarged models exhibited in a case in the 

 Central Hall of the IMuseum.1 



