﻿Merriman: 
  Conjugation 
  of 
  Spirogyra 
  ternata 
  

  

  15 
  

  

  cells 
  with 
  their 
  tubes 
  formed, 
  an 
  equal 
  number 
  show 
  by 
  their 
  

   tumidity 
  an 
  approach 
  to 
  the 
  conjugating 
  state, 
  while 
  only 
  twenty- 
  

   three 
  show 
  no 
  signs 
  of 
  conjugation. 
  Since 
  there 
  are 
  only 
  fifty-six 
  

   cells 
  all 
  told 
  in 
  the 
  cf 
  thread 
  it 
  is 
  obvious 
  that 
  many 
  of 
  the 
  tumid 
  9 
  

   cells 
  would 
  have 
  proceeded 
  to 
  abortive 
  conjugation. 
  In 
  the 
  two 
  

   portions 
  of 
  the 
  filaments, 
  A-B 
  and 
  C-D, 
  where 
  the 
  curves 
  are 
  

   greatest 
  and 
  where 
  in 
  consequence 
  the 
  cf 
  thread 
  is 
  under 
  the 
  

   greatest 
  compression, 
  it 
  should 
  be 
  noted 
  that 
  the 
  9 
  cells 
  which 
  

  

  r 
  

  

  show 
  tumidity 
  are 
  opposite 
  cT 
  cells 
  which 
  have 
  already 
  conjugated. 
  

   Seven 
  conjugating 
  cells 
  in 
  succession 
  are 
  included 
  in 
  the 
  semicir- 
  

   cular 
  curve 
  C-D, 
  while 
  in 
  the 
  curve 
  A-B 
  there 
  is 
  a 
  succession 
  of 
  

  

  TABLE 
  I 
  

   Series 
  A 
  

  

  Sex 
  

  

  Nnm- 
  

  

  ber 
  

  

  of 
  

  

  cells 
  

  

  Length 
  

   of 
  draw- 
  

   ing 
  of 
  

   magni- 
  

   fied 
  fila- 
  

   ments 
  

   in 
  mm. 
  

   meas- 
  

   ured 
  by 
  

   thread 
  

  

  Sum 
  of 
  

   magni- 
  

   fied 
  

   lengths 
  

   of 
  

   cells. 
  

   meas- 
  

   ured 
  

   with 
  

   ruler 
  

  

  Conjugat- 
  

   ing 
  cells 
  

  

  Cells 
  tumid. 
  

  

  conjugating 
  

  

  tubes 
  not 
  

  

  formed 
  

  

  

  9 
  

  

  95 
  

   56 
  

  

  779 
  

  

  6l2 
  

  

  939 
  

  

  

  

  «l 
  

  

  £ 
  

  

  

  N 
  on- 
  conju- 
  

   gating 
  cells 
  

  

  Ratios 
  

  

  a 
  

  

  

  c 
  

  

  O 
  

  

  04 
  

  

  

  (/] 
  

  

  B 
  

  

  3 
  

  

  

  701 
  

   603 
  

  

  __^ 
  

  

  36 
  

   36 
  

  

  63 
  

  

  84 
  

  

  36 
  

  

  4 
  

  

  48 
  

  

  62 
  

  

  23 
  

  

  16 
  

  

  9 
  167 
  I 
  998 
  

  

  42 
  

   65 
  

  

  ■757 
  

   .714 
  

  

  .242 
  

   .285 
  

  

  cf2i 
  I 
  932 
  ' 
  cfi4l 
  97 
  I 
  cf23 
  19.043 
  !c?.043 
  

  

  twelve 
  conjugating 
  or 
  tumid 
  cells 
  with 
  a 
  single 
  interruption. 
  

   It 
  is 
  to 
  be 
  noted 
  that 
  the 
  compression 
  in 
  the 
  cT 
  filament 
  occurs 
  

  

  ^^ 
  r 
  

  

  before 
  the 
  rupture 
  of 
  the 
  tubes 
  and 
  the 
  mingling 
  of 
  the 
  cell 
  con- 
  

   tents 
  and 
  hence 
  before 
  the 
  relaxation 
  of 
  the 
  chromatophores. 
  In 
  

   Table 
  II 
  the 
  cells 
  of 
  Series 
  A 
  are 
  grouped 
  according 
  to 
  the 
  length 
  

   of 
  the 
  outer 
  walls. 
  

  

  The 
  next 
  measurements 
  taken 
  were 
  those 
  of 
  the 
  distances 
  

   betw^een 
  the 
  outer 
  and 
  inner 
  terminal 
  points 
  of 
  the 
  transverse 
  

  

  TABLE 
  II 
  

  

  ARILVNGED 
  

  

  Length 
  outer 
  wall 
  in 
  microns 
  

  

  9 
  conjugating 
  

  

  cf 
  conjugating 
  

  

  9 
  tumid 
  , 
  

  

  c? 
  tumid 
  

  

  9 
  non-potent 
  

  

  cf 
  non-potent 
  

  

  101-, 
  94- 
  , 
  87- 
  

  

  108 
  

  

  joi 
  j 
  94 
  

  

  6 
  

  

  87 
  

  

  4 
  

  

  5 
  

  

  73- 
  

  

  66- 
  

  

  1 
  

  

  59- 
  

  

  52- 
  

  

  45" 
  

  

  „ 
  1 
  

   38- 
  1 
  31- 
  

  

  1 
  

  

  24- 
  

  

  17- 
  

  

  So 
  

  

  73 
  66 
  

  

  59 
  

  

  52 
  45 
  

  

  1 
  

  

  38 
  

  

  3' 
  

  

  24 
  

  

  1 
  

  

  I 
  

  

  14: 
  

  

  1 
  

  

  9 
  

  

  5 
  

  

  1 
  

  

  3 
  

  

  1 
  

   I 
  

  

  3 
  

  

  . 
  

  

  

  14 
  

  

  2 
  

  

  2 
  

  

  

  

  

  I 
  

  

  

  

  

  ■ 
  

  

  2 
  

  

  10 
  

  

  10 
  

  

  7 
  

  

  6 
  

  

  

  I 
  

  

  2 
  

  

  I 
  

  

  

  

  

  I 
  

  

  I 
  

  

  

  

  

  1 
  

   1 
  

  

  

  3 
  

  

  7 
  

  

  7 
  

  

  3 
  

  

  2 
  

  

  I 
  

  

  4 
  

  

  3 
  

  

  3 
  

  

  3 
  

  

  2 
  

  

  I 
  

  

  r 
  

   1 
  

  

  

  1 
  

  

  