29& 



one-fifth to one-sixth as large as the red cells ; 

 growth is progressive during the apyrexia, and 

 six to ten hours before the next attack ' preseg- 

 menting ' forms will be found. The parasite now 

 fills the cell which is not enlarged. The pigment 

 is arranged in radiating band's. The next stage 

 is the concentration of the pigment in a central 

 mass, and it is seen in fresh or stained specimens 

 that the cytoplasm is divided into eight to ten 

 segments or oval bodies (daisy form). This seg- 

 mentation is nearly coincident with the next 

 attack, but parasites in complete fission may be 

 found five to six hours earlier. As the tempera- 

 ture rises these sporulating forms disappear and, 

 again, young forms are found in the red cells. The 

 quartan then goes through all its stages in the 

 peripheral circulation. 



Double Quartan 



Two groups of parasites going through the 

 above regular cycle, with about a day's interval, 

 may be followed in the blood. 



Triple Quartan 



There are three distinct groups sporulating 

 on successive days. 



Malignant Tertian (Tropical) 



During the pyrexia, small forms, one-eighth 

 [one-fifth] of the red cell, may be found. They 

 persist during the pyrexia, i.e., for the greater part 

 fo a day. The parasites at this stage may be ex- 

 traordinarily few. 



