FUSION MASSES OF WHOLE STENTORS 



211 



that cell shape is an expression of the cortical stripe pattern, 

 following its unity, distortion, or multiplicity. In other words, one 

 never finds a normal cell shape imposed on a grossly abnormal 

 stripe pattern. 



Fig. 59. Formation of multiple cell-shapes. 



A. Persistent doublets often show tendency to produce 



parallel bodies. 



B. The same tendency to "cleavages" shown in a triplet 



(posterior end view). 



C. Tail folded into wound left by removing the division 

 primordium. A new tail was produced at the bend (x) and each 

 pole organized a separate cell shape. The nuclear chain is 



relocated accordingly. 



2. Adjustments among formed ectoplasmic organelles 



Correlated with the reconstitution of the normal stentor shape 

 are shifts and adjustments of formed feeding organelles and 

 holdfasts. Figure 60 illustrates the major tendencies. 



Separated organelles migrate together, like to like, in spite of 

 the intervening ectoplasmic striping. In fact, the lateral striping 

 co-operates or may even produce these shifts by resorptive 

 shortening between the parts and extension elsewhere. Isolated 

 mouthparts and membranellar bands may travel a long way to 

 join with or even break into a major set of feeding organelles. 

 Stentors in which the left half was rotated 180° and healed securely 

 to the right nevertheless could sometimes gradually return to the 



