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THE BIOLOGY OF STENTOR 



Fig. 41. Abnormal primordium developments {S. coeruleus). 



A. Anlage slanting in direction opposite from the normal, 

 satisfactory reorganization nevertheless accomplished. 



B. Stage-5 divider treated with dilute sea water to cause 

 shedding of membranellar band and all but posterior end of the 

 division primordium. Though the posterior daughter formed 

 only a gullet, this organelle and the multiplied striping of the 

 prospective frontal field moved anteriorly to their normal 



positions. Both cells then regenerated. 



