SPOROZOA 



459 



r- , 



4T*j? 



V V. 



Fig. 201. Piroplasma parvum, life cycle: 1, Agametes of the first generation 

 (inetagametes) ; 2, a and 6, agamonts with one nucleus; 3, a and 6, agamonta 

 with several nuclei; 4, a and 6, medium-sized agamonts; 5, a and b, large aga- 

 monts with numerous nuclei; 6, a and 6, agamonts undergoing schizogony; 7, 

 a and 6, agametes; 8, a and 6, reduction forms of agamonts; 9, a and 6, seg- 

 mentation of reduction forms of agamonts; 10, a and 6, young agamonts; 11, 

 a and 6, medium-sized gamonts with several nuclei; 12 and 13, a and 6, large 

 gamonts with numerous nuclei; 14, a and 6, gamonts undergoing schizogony; 

 15, free gametocytes; 16, gametocytes in the red blood-corpuscles; 17, micro- 

 and macrogametes in the stomach of the tick; 18, copulation; 19, karyomyxis; 

 20 and 21, formation of the ookinetes; 21, retort forms of ookinete; 22, 

 ookinete (Gonder, in " Journal of Comparative Pathology and Therapeutics"). 



