﻿Fig. 
  I. 
  A 
  pair 
  of 
  conjugating 
  filaments, 
  showing 
  torsion 
  at 
  points 
  B, 
  C 
  and 
  D; 
  

  

  the 
  cf 
  thread 
  is 
  broken 
  at 
  F. 
  X 
  140. 
  reduced 
  one 
  half. 
  

   Fig. 
  2. 
  A 
  model 
  of 
  the 
  broken 
  filament 
  replaced 
  in 
  its 
  original 
  position, 
  showing 
  

  

  relaxation 
  in 
  d* 
  cells 
  thatwere 
  previously 
  compressed. 
  

  

  