CORTICAL NETWORK OF SUCTORIANS 



67 



place independently of any division. It appears therefore 

 that the arrangement of kinetosonies and the pioduction of 

 cilia are controlled by the nutrition. W'lien tlie ciliate feeds, 



■\V !'/''• '• -/ 



Fig. 28. Podophrya parasitica, (a) Adult and embryo, (b) Free 



embryo, (c) Newly fixed embryo, (d) Embryo resulting from the 



total transformation of an adult, (e) "Tokophrya' form. 



kinetosomes are organized and produce cilia only in one 

 region, which becomes the surface of the embryo. When 

 the nutrition ceases, the adult as a whole is organized and 

 produces cilia. 



