184 MICROBES, FERMENTS, AND MOULDS. 



have also observed the parasitic nature of intermittent 

 fever in Algeria. The organism which they have 

 constantly found in the blood of those affected by 

 marsh fever presents several different aspects, but 

 appears especially to attack the red corpuscle of the 



Fig R4. Parasite of intermittent fever (La veran): A, normal haematin; B, B, corpuscle 

 No. 1 ; C, corpuscle No. 2, motionless ; D, corpuscle No. 2, containing mobile 

 pigmented grains ; E, corpuscle No. 2, provided with mobile filaments ; G, detached 

 mobile filament ; H, H, corpuscle No. 3 ; I, K, corpuscle No. 2, of small size, 

 red and agglomerated ; L, L, hfematins to which the small corpuscles No. 2 are 

 attached ; M, pigmented leucocytes, their nuclei made visible by carmine. 



blood, in which, according to Laveran's expression, 

 " it is encysted like a weevil in a grain of wheat." 



