3i6 



Chapter X XVI 

 THE UAEMOCYTOZOA— Continued 



The haemocytozoa, or endoglobular haema- 

 tazoa, are divided by Laveran into three genera : 



1. Genus Haemamoeba. 



2. Genus Piroplasma. 



3. Genus Haemogvegarina. 



The genus haemamoeba includes the malaria 

 parasites with which we have already fully dealt. 

 We now proceed to the other members of the genus, 

 and then to the other two genera, which go to 

 make up the endoglobular haematazoa. 



Genus Haemamoeba 



Haemamoebae in Birds 



I. H. relicta (Proteosoma grassit). — Dis- 

 covered by Grassi in the blood of birds in Italy. 

 In certain regions sparrows and goldfinches are 

 commonly infected. Sparrows are frequently in- 

 fected in India. In Africa numerous small birds 

 were examined by us, but proteosoma was never 

 found (only halteridiura). Transmission from one 

 bird to another by inoculation is readily effected. 

 Canaries are extremely susceptible. Pigeons, 

 among other birds, are immune. Birds that have 

 recovered from an infection have acquired a well- 

 marked immunity against asubsequent inoculation 



