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MANUAL OF BACTERIOLOGY. 



the spore-forming organism. The spores finally break apart 

 and scatter, each destined to invade a red corpuscle and 

 start anew the cycle of development. This cycle may be 

 repeated over and over again, producing a corresponding 

 number of malarial paroxysms. 



Fig. loi. 



Fig. 102. 



Fig. 103. Fig. 104, 



Figs. 101-104. — Malarial Pakasites in Various Stages. (X 1000.) 

 Figs. loi, 102 and 103 are tertian parasites. Fig. 103 shows the comple- 

 tion of segmentation. Fig. 104 is the crescentic form of the estivo-autumnal 

 parasite. 



Certain full-grown parasites do not complete the cycle of development by 

 sporulation, as described, but, breaking loose from the corpuscle, remain as 

 "extracellular" bodies. These are seen chiefly after the paroxysm as large, 

 round, pale bodies containing numerous dancing pigment granules scattered 

 through their substance. They ultimately degenerate and disappear. Some 

 of these extracellular forms may be seen to develop long slender processes, 

 flagella, having a very active whip-Uke motion. Flagella are never observed 



