GENETIC CONTINUITY OF KINETIES 51 



stant. Things happen as if the number of kinetosomes per 

 surface unit were more or less constant. 



The constancy of the cortical pattern is not the sole result 

 of the perpetuation of autonomous populations of kineto- 

 somes or of specific kinetics. It appears to be the result of 

 the response of an apparently homogeneous population of 

 kinetosomes to their environment. 



