172 



PROTOZOOLOGY 



parent organism. It is either exogenous or endogenous, depending 

 upon the location of the developing buds or gemmules. Exogenous 

 budding has been reported in Acanthocystis, Noctiluca (Fig. 127), 

 Myxosporidia (Fig. 70, b), astomatous ciliates (Fig. 298), Chono- 

 tricha, Suctoria (Fig. 371, k), etc. Endogenous budding has been 



lit 



/im 



Fig. 70. a, b, budding in Myxidium lieberkiihni; c, d, plasmotomy in 

 Chloromyxum leydigi; e, plasmotomy in Sphaeromyxa balbianii. 



found in Testacea, Gregarinida, Myxosporidia (Figs. 279, e; 281, j), 

 and other Sporozoa as well as Suctoria (Fig. 371, h). Collin observed 

 a unique budding in Tokophrya cyclopum in which the entire body, 

 excepting the stalk and pellicle, transforms itself into a young 

 ciliated bud and leaves sooner or later the parent pellicle. 



Plasmotomy. Occasionally the multinucleate body of a protozoan 

 divides into two or more small, mutinucleate individuals, the cyto- 

 plasmic division taking place independently of nuclear division. This 

 has been called plasmotomy by Doflein. It has been observed in the 



