50 



HANDBOOK OF PROTOZOOLOGY 



degenerating remains of the parent body. In this process the 

 nucleus may undergo either simultaneous multiple division, as 

 in Aggregata, or more commonly, repeated binary fission, as in 

 Plasmodium, to produce large numbers of daughter nuclei. The 

 number of daughter individuals varies, not only among the 



■.■■-.fi^a;'.?;*- 



'iJVIt-' • 



/mi 



Fig. 23 Asexual reproduction in Myxosporidia. (From Kudo after several 



authors), 

 a, trophozoite of Myxidium Ueberkiihni; b, budding in the same myxo- 

 sporidian; c, d, plasmotomy of trophozoite of Chloromyxum leydigi; e, plas- 

 motomy of a trophozoite of Sphaeromyxa balbianii. 



different groups, but also within one and the same species. 

 Multiple division occurs commonly in Foraminifera, Radiolaria, 

 Sporozoa, etc. Asexual multiple division, which is called schizog- 

 ony, takes place widely in Sporozoa. In Mastigophora it is not 

 of common occurrence but has been noted in cultures of Try- 

 panosoma lewisi, T. cruzi, Lophomonas blattarum, etc. 



