﻿414 
  J. 
  W. 
  .TENKINSON. 
  

  

  (b) 
  Telophase 
  (fig. 
  2). 
  — 
  The 
  next 
  stnge 
  I 
  have 
  is 
  a 
  telo- 
  

   phase. 
  The 
  spindle 
  consists 
  of 
  wavy 
  bipolar 
  fibres, 
  but 
  no 
  

   bundles 
  are 
  to 
  be 
  seen. 
  The 
  chromosomes 
  are 
  united 
  at 
  each 
  

   pole 
  iuto 
  an 
  irregular, 
  thick, 
  annular 
  skein; 
  at 
  the 
  outer 
  end 
  

   the 
  surface 
  is 
  raised 
  up 
  iuto 
  a 
  little 
  flat 
  disc 
  with 
  a 
  houio- 
  

   geneous 
  border. 
  Later, 
  this 
  flat 
  disc 
  is 
  constricted 
  off 
  as 
  the 
  

   first 
  polar 
  body, 
  and 
  found 
  united 
  only 
  by 
  a 
  narrow 
  stalk 
  to 
  

   the 
  egg, 
  and 
  lying 
  in 
  a 
  slight 
  depression 
  at 
  the 
  surface 
  of 
  the 
  

   latter 
  (fig. 
  3). 
  

  

  In 
  the 
  polar 
  body 
  the 
  chromosomes 
  are 
  not 
  jet 
  distinct, 
  as 
  

   they 
  will 
  be 
  later; 
  there 
  are 
  also 
  present 
  pigment 
  and 
  yolk- 
  

   granules. 
  The 
  stalk 
  is 
  fibri 
  Hated, 
  the 
  fibriilge 
  thickened 
  to 
  

   form 
  "intermediatebodies'^ 
  ("Zwischenkorper" 
  of 
  Flemming). 
  

   The 
  stalk 
  contains 
  a 
  few 
  pigment-granules. 
  

  

  In 
  the 
  egg 
  the 
  chromatin 
  skein 
  is 
  resolved 
  into 
  chromo- 
  

   somes, 
  which 
  are 
  V-shaped, 
  aggregated 
  by 
  their 
  apices, 
  and 
  

   lie 
  in 
  a 
  clear 
  area 
  devoid 
  of 
  yolk-granules. 
  

  

  2. 
  Second 
  polar 
  division. 
  

  

  (a) 
  It 
  is 
  apparently 
  from, 
  or 
  in, 
  this 
  clear 
  area 
  that 
  the 
  

   second 
  polar 
  spindle 
  is 
  formed, 
  for 
  a 
  little 
  later 
  the 
  chromo- 
  

   somes 
  — 
  which 
  have 
  meanwhile 
  split 
  longitudinally 
  — 
  are 
  seen 
  

   lying 
  in 
  an 
  elongated 
  area, 
  which 
  is 
  distinctly 
  fibrillated, 
  and 
  

   occupies 
  a 
  tangential 
  position 
  (fig. 
  4). 
  

  

  In 
  the 
  first 
  polar 
  body 
  the 
  chromosomes 
  have 
  simulta- 
  

   neously 
  undergone 
  longitudinal 
  fission. 
  

  

  In 
  one 
  other 
  preparation 
  that 
  I 
  have 
  the 
  second 
  polar 
  

   spindle 
  occupies 
  a 
  similar 
  position, 
  but 
  ihe 
  fibres 
  are 
  much 
  

   more 
  evident, 
  and 
  there 
  seems 
  to 
  be 
  a 
  distinction 
  between 
  

   them, 
  some 
  being 
  arranged 
  in 
  bundles 
  and 
  attached 
  to 
  chro- 
  

   mosomes, 
  others 
  passing 
  continuously 
  from 
  one 
  end 
  of 
  the 
  

   spindle 
  to 
  the 
  other. 
  

  

  (b) 
  Metaphase. 
  — 
  In 
  describing 
  the 
  next 
  stage 
  in 
  the 
  

   formation 
  of 
  the 
  second 
  polar 
  spindle 
  I 
  must 
  distinguish 
  

   between 
  two 
  lots 
  of 
  eggs 
  ; 
  one 
  lot 
  was 
  obtained 
  from 
  the 
  

   oviduct 
  and 
  uterus, 
  the 
  second 
  comprises 
  freshly-laid 
  ova. 
  

  

  