GENETIC CONTINUITY OF KINETIES 



49 



landi. It appears that it is relatively easy for this ciliate to 

 regenerate its peristomial zone, but it cannot regenerate the 

 basal disc. This beautiful (experiment unfoi'tunately does 



Fig. 18. Licnophora chattoni. (a) Ciliate in vivo, (b) Early stage of 



the stomatogenic field. (c), (d) The anarchic field. (e) Alem- 



branelles are modelled into the anarchic field, (f)-(i) Division of the 



ciliate, showing the reproduction of the basal disc. 



not solve the problem. The inability to regenerate the basal 

 disc with its ciliary system could be due: (a) to the sup- 

 pression of a specialized line of kinetosomes; (b) to the 

 suppression of some cortical elements endowed with geneti- 

 cal continuity; (c) to the suppression of both specialized 

 kinetosomes and cortical organelles. 



