26 SOME MINUTE ANIMAL PARASITES 



part of its substance is withdrawn, the membrane 

 becomes merged in the body, and gradually a clearer 



area makes its 

 app ear an c e 

 around the part 

 containing the 

 nuclear bodies 

 (Fig. 5). This 

 clear area shows 

 as a bright shin- 

 ing band of oval 

 contour when 

 the parasite is 

 examined under 

 the microscope. 

 Gradually the 

 shining area 

 hardens, for it is 

 really a very thin 

 protective coat 

 in the making, 

 and the parts of 

 the body not re- 

 quired are left 

 outside it, and 

 simply disinte- 

 grate. The oval 

 or rounded 

 THIRTY bodies thus pro- 

 duced remain 

 relatively in the same place as where they were 

 formed, and consequently do not occur in large 



FIG. 5 DIAGRAMMATIC REPRESENTATION OF 

 THE FORMATION OF NON - FLAGELLATE 

 (LATENT) BODIES OF TRYPANOSOMA GAM- 

 BIENSE IN INFECTED RAT'S BLOOD, AS 

 SEEN UNDER THE MICROSCOPE ON A WARM 

 STAGE DURING A PERIOD OF 

 MINUTES 



