90 MANUAL OF HUMAN PROTOZOA 



to appear later in the year than the other two. The entire 

 schizogony can be seen in the peripheral blood. 



Schizonts 



1. Ring forms. The ring form is similar to that of P. 

 vivax. Large ring forms may be about one-third the diam- 





V '^ 



9 10 II 12 



Fig. 23. Plasmodium malariae. X 1150. (original) 



I. Ring fomi. 



2-5 Band-form schizonts. 

 6-8. Schizogonic stages. 

 9, 10. Merozoite formation. 



II. A macrogametocyte. 

 12. A microgametocyte. 



eter of erythrocytes (Fig, 23, 1). The cytoplasm stains more 

 deeply than that of F. vivax. 



2. Growth period. The schizont is less amoeboid and, 

 as a rule, rounded in outline in stained smears, although 

 somewhat irregular forms may occur. In about 6-10 hours, 

 haemozoin granules begin to appear in the cytoplasm. 



