104 '^"^ BIOLOGY OF STENTOR 



of the cell which is for the purpose of bringing them into a more 

 normal relationship. 



Deserving special emphasis is the point that the macronucleus 

 seems to be as much dependent on a cytoplasmic primordium 

 formation for its growth as the primordium is dependent on it. 

 Hence it could be that when the macronucleus needs adjusting to 

 the cell volume, the mouthparts are cryptically ** autotomized ", as 

 suggested above, in order to incite anlage formation without which 

 the nucleus cannot undergo extensive alterations. 



