128 



THE ANIMALS AND MAN 



The germ now feeds and grows at the expense of the 

 corpuscle. It may become nearly as large as the whole 

 corpuscle. Then its body stuff divides into about six parts, 

 the corpuscle breaks down, and the six new germs escape 



FIG. 51. Malarial mosquito, Anopheles maculipennis, on the wall. (Photo 

 graph from life by R. W. Doane.) 



into the blood to find new blood-corpuscles to attack. 



This kind of simple multiplying goes on for a number of 

 generations but ceases after a while, and the germs of the 

 last generation lie inert in the blood until they can be taken 

 into a mosquito's body. Then a new life-cycle is started, 

 according to the processes already described. 



This, in brief and most general terms, is the story of the 

 relation of the minute Protozoan animals called Hcematozoa, 



