OVOPLASMA ANUCLEATUM 



491 



Genus Ovoplasma De Raadt, 1913. 



Definition. — Toxoplasmidae without definite nucleus. 

 Remarks. — Some doubt has been thrown upon this genus and 

 its species. 



Type Species. — Ovoplasma anucleatum De Raadt, 1913. 



Ovoplasma anucleatum De Raadt, 1913. 



Definition. — Ovoplasma ring-like, with large vacuole, found in 

 man. 



History.— This parasite Was found in Borneo in the spleen of a 

 Madurese with splenomegaly, who was bom in Java. 



Morphology.— The organisms were generally found in mononuclear 

 leucocytes, though rarely they Were in the red cells. They Were 

 ring-like, with large vacuoles and without any nucleus, but the 

 cytoplasm collects on one side of the vacuole. Sometimes it was 

 py rif orm . 



Life-Cycle. — It reproduces by budding and by binary fission. 

 Pathogenicity.— May be harmless, but in certain cases pathogenic. 



Family PiroplasmidcB Franga, 1909. 



Definition. — -Hsemosporidia without hsemozoin living in red blood- 

 corpuscles. 



Classification.— P^jr^/)/^?swa Seidelin, 1911, is the resultant of 

 certain blood conditions, and is not a parasite. Globidium Neumann, 

 1909, and Immanoplasma Neumann, 1909, require further investi- 

 gation. 



The following genera can be differentiated : — 



1. Piroplasma Patton, 1895. 



2. Smithia Franga, 1909. 



3. NuUallia Franga, 1909. 



4. Theileria Bettencourt, Franga, and Borges, 1907. 



5. Achromaticus Dionisi, 1900. 



6. Rangelia Carini and Maciel, 1914. 



7. Rossiella Nuttall, 1910. 



8. Elleipsisoma Fran9a, 1910. 



9. Nicollia Nuttall. 



10. Anaplasma Theiler, 1910. 



11. Bartonella Strong, Tyzzer, Brues, Sellards, and Gastia- 



buru, 1915. 



A. Cytoplasm voluminous : — • 



I. Rounded forms in red cells with circular nucleus. 

 Schizogony by binary division inside red cells. 

 Division may continue and form a number of large 

 merozoites — Rossiella. 

 II. Oval forms in red cells, which they dehsemoglobinize. 

 Nucleus large at one side of parasite. Schizogony in 

 the lung — -Elleipsisoma, 



