332 



also fragment. Parasite is reniform, 15-18 ^l■ by 

 5-6 fjL . The protoplasm has numerous granules. 



16. H. curvirostrts. — In Lacerta ocellata var. 

 pater. Differs from the previous one. (i) The 

 vermicule form destroys the nucleus ; (2) The 

 encysted form becomes embedded in the nucleus. 



cufviroii 



Irjs. 



Fig. 73B# Shewing disintegrating action on nucleus. 



Genus Piroplasma 



SPECIES 



P. bovis 

 P. can is 

 P. ovis 

 P. equi 

 P. hominis 



HOST 



Cattle (Texas fever organism) 



Dogs (Italy, Senegal) 



Sheep (Italy, Roumania) 



Horse (S. Africa) 



Man (producing ' spotted fever ') 



I. P. bovis. — ' The parasite of Texas fever of 

 cattle clearly does not belong to the proper group 

 of malaria parasites, although it occurs in. the red 

 cell. It forms no pigment, and differs in its 

 development from the malaria parasite ' (Koch). 



