356 



THE BIOLOGY OF STENTOR 



Fig. 98. Grafting operations. 



A. Producing a doublet, a: Two stentors are split down the 

 back with sharp needle and opened wide to expose the endo- 

 plasms. b: With a blunt needle (broken tip) animals are 

 orientated and one is pushed against the other, exposed endo- 



plasms pressing together, c : Doublet stentor resulting. 



B. Implanting a cell sector, a: Cuts made from both ends to 

 isolate the primordium sector with or without nuclear nodes, 

 leaving cell remnants at each end. b: Host split open and graft 



