57 



3- Fertilization of the makrogamete = ovum 

 or copula, on the slide and in nature in mosquito. 



4. Vermiculus or ookinet. Only in mosquito 

 stomach. 



5. Zygote or oocyst. In stomach wall. 



6. Medium or large zygote with sporoblasts. 



7. Sporozoits. In salivary glands. 



The sexual cycle is known also as sporogony 

 or amphigony, while the asexual cycle is known 

 as schizogony or monogony. These two cycles 

 and their relation to one another are shewn in 

 the figure (Fig. g). 



Further, there is a certain amount of evidence 

 to shew that a gamete (?) in the blood can undergo 

 a kind of retrogressive development, and give rise 

 by parthenogenesis to young parasites (i'.e., 

 schizonts). If this is so, it would explain the 

 supposed function of old attributed to crescents 

 (gametes) of producing relapses. 



