﻿THK 
  MAIOTIC 
  PHASE 
  IN 
  ANIMALS 
  AND 
  PLANTS. 
  515 
  

  

  Although 
  such 
  6gures 
  are 
  rare 
  in 
  the 
  lilj, 
  they 
  are 
  quite 
  

   common 
  in 
  Trad 
  eacautia, 
  and 
  also 
  in 
  the 
  salamander, 
  as 
  

   was 
  long 
  ago 
  figured 
  and 
  described 
  by 
  Flemming. 
  The 
  same 
  

   interpretation, 
  as 
  will 
  be 
  apparent 
  from 
  what 
  follows 
  below, 
  

   is 
  also 
  applicable 
  to 
  such 
  cases. 
  

  

  When 
  the 
  daughter 
  chromosomes 
  arrive 
  at 
  their 
  respective 
  

   poles 
  the 
  nuclei 
  are 
  reconstituted, 
  and 
  a 
  complete 
  bipartitiou 
  

   of 
  the 
  pollen-mother-cell 
  takes 
  place. 
  It 
  is 
  not 
  necessary 
  to 
  

   give 
  details 
  of 
  these 
  processes 
  here, 
  as 
  they 
  are 
  not 
  relevant 
  

   to 
  the 
  main 
  object 
  of 
  the 
  paper. 
  

  

  The 
  nuclei 
  do 
  not 
  pass 
  into 
  a 
  state 
  of 
  complete 
  rest, 
  although 
  

   it 
  is 
  not 
  practicable 
  to 
  trace 
  with 
  certainty 
  the 
  individual 
  

   identity 
  of 
  the 
  chromosomes 
  throughout 
  the 
  whole 
  period 
  in- 
  

   tervening 
  between 
  the 
  appearance 
  of 
  the 
  nuclear 
  wall 
  and 
  

   the 
  next 
  mitosis. 
  But 
  enough 
  can 
  be 
  seen 
  to 
  leave 
  no 
  doubt 
  

   as 
  to 
  the 
  course 
  of 
  events 
  that 
  characterise 
  the 
  second 
  (homo 
  

   type) 
  mitosis 
  of 
  the 
  spore-mother-cell. 
  

  

  As 
  the 
  chromosomes 
  for 
  this 
  second 
  (homotype) 
  mitosis 
  

   disentangle 
  themselves 
  from 
  the 
  chromatic 
  plexus 
  of 
  the 
  

   nucleus, 
  they 
  are 
  found 
  to 
  present 
  some 
  diversity 
  in 
  form, 
  and 
  

   this 
  is 
  continued 
  up 
  to 
  the 
  stage 
  of 
  the 
  diaster. 
  

  

  Often 
  they 
  look 
  like 
  sinuous 
  V-like 
  structures 
  with 
  the 
  ends 
  

   thicker 
  than 
  the 
  middle. 
  The 
  limbs 
  of 
  the 
  V 
  are 
  long, 
  and 
  

   finally 
  break 
  asunder 
  at 
  the 
  bend. 
  The 
  two 
  halves 
  then 
  

   separate, 
  but 
  usually 
  show 
  a 
  crook 
  or 
  curvature 
  where 
  they 
  

   separate. 
  Finally 
  the 
  respective 
  limbs 
  diverge 
  one 
  towards 
  

   each 
  pole. 
  In 
  other 
  examples 
  the 
  chromosomes 
  appear 
  as 
  

   longitudinally 
  split 
  V-like 
  bodies. 
  These 
  are 
  to 
  be 
  related 
  

   with 
  the 
  similar 
  structures 
  seen 
  as 
  occasional 
  varieties 
  during 
  

   the 
  diaster 
  o£ 
  the 
  preceding 
  heterotype 
  mitosis. 
  Both 
  these 
  

   forms 
  have 
  long 
  been 
  familiar 
  to 
  us, 
  and 
  have 
  been 
  observed 
  

   by 
  others, 
  but 
  it 
  is 
  clear 
  that 
  they 
  are 
  only 
  special 
  cases 
  of 
  

   the 
  general 
  phenomena. 
  But 
  the 
  former 
  and 
  much 
  more 
  

   commonly 
  occurring 
  forms 
  have 
  been 
  regarded 
  by 
  some, 
  

   e. 
  g. 
  Belajeff,^ 
  as 
  indicating 
  the 
  existence 
  of 
  a 
  transverse 
  

   fission 
  during 
  the 
  homotype 
  mitosis, 
  and 
  thus 
  as 
  proving 
  

   > 
  ' 
  Flora,' 
  1894 
  (Erganzungsbd). 
  

  

  