﻿MATURATIOX, 
  ETC., 
  OF 
  THE 
  EGG 
  OP 
  THE 
  AXOLOTL. 
  415 
  

  

  To 
  begin 
  with 
  fche 
  second, 
  in 
  all 
  these 
  ova 
  the 
  spindle 
  is 
  found 
  

   in 
  a 
  radial 
  or 
  nearly 
  radial 
  position 
  (fig. 
  5). 
  It 
  consists 
  of 
  

   outer 
  and 
  inner 
  fibres 
  ; 
  the 
  former 
  radiate 
  out 
  amongst 
  yolk- 
  

   granules 
  and 
  pigment, 
  and 
  lose 
  themselves 
  in 
  the 
  general 
  

   cytoplasm 
  ; 
  the 
  fibres 
  from 
  opposite 
  poles 
  do 
  not 
  cross, 
  but 
  are 
  

   diverted 
  into 
  the 
  equatorial 
  plane. 
  They 
  are 
  to 
  be 
  regarded 
  

   as 
  astral 
  rays. 
  The 
  inner 
  fibres 
  pass 
  from 
  pole 
  to 
  pole, 
  are 
  

   wavy, 
  and 
  frequently 
  meet; 
  certain 
  of 
  them 
  are 
  gathered 
  

   together 
  into 
  bundles, 
  and 
  to 
  these 
  bundles 
  the 
  apices 
  of 
  the 
  

   chromosomes 
  are 
  attached. 
  Towards 
  the 
  poles 
  the 
  constituent 
  

   fibres 
  of 
  the 
  bundles 
  again 
  separate 
  from 
  one 
  another 
  and 
  

   mingle 
  with 
  the 
  general 
  fibres 
  of 
  the 
  spindle. 
  If 
  wo 
  examine 
  

   a 
  transverse 
  section 
  of 
  such 
  a 
  spindle 
  we 
  find 
  a 
  poly- 
  

   gonal 
  meshwork 
  thickened 
  at 
  the 
  nodes; 
  in 
  addition, 
  the 
  

   fibre-bundles 
  just 
  described 
  are 
  seen 
  occupying 
  each 
  the 
  

   centre 
  of 
  a 
  system 
  of 
  triangular 
  areas. 
  The 
  whole 
  appear- 
  

   ance 
  — 
  as 
  seen 
  in 
  both 
  longitudinal 
  and 
  transverse 
  section 
  — 
  

   is 
  therefore 
  quite 
  consistent 
  with 
  the 
  supposition 
  that 
  we 
  are 
  

   here 
  dealing 
  with 
  elongated 
  alveoli 
  (I 
  do 
  not 
  use 
  the 
  word 
  

   with 
  the 
  whole 
  of 
  Biitschli's 
  connotation), 
  the 
  fibres 
  in 
  that 
  

   case 
  being 
  merely 
  the 
  optical 
  sections 
  of 
  the 
  inter-alveolar 
  

   lamella. 
  

  

  At 
  the 
  outer 
  pole 
  of 
  the 
  spindle 
  is 
  a 
  slight 
  depression 
  in 
  

   the 
  surface 
  of 
  the 
  egg. 
  

  

  At 
  both 
  ends 
  of 
  the 
  spindle 
  the 
  fibres 
  converge 
  to 
  a 
  dense 
  

   granular 
  mass, 
  somewhat 
  flattened 
  in 
  the 
  direction 
  of 
  the 
  

   spindle-axis, 
  which 
  may 
  perhaps 
  be 
  regarded 
  as 
  a 
  centro- 
  

   some 
  ; 
  but 
  I 
  am 
  unable 
  to 
  state 
  anything 
  of 
  its 
  origin, 
  and 
  

   later 
  it 
  certainly 
  disappears. 
  

  

  The 
  chromosomes 
  in 
  the 
  spindles 
  are 
  V-shaped, 
  moniliform, 
  

   and 
  paired; 
  they 
  lie 
  in 
  the 
  equatorial 
  plane 
  with 
  their 
  apices 
  

   pointing 
  inwards; 
  they 
  are 
  not 
  disposed 
  in 
  a 
  regular 
  ring, 
  

   but 
  some 
  are 
  nearer 
  to, 
  some 
  further 
  from, 
  the 
  spindle-axis. 
  

   We 
  have, 
  therefore, 
  here 
  again 
  a 
  " 
  mixed 
  " 
  spindle 
  in 
  Moves' 
  

   sense. 
  

  

  In 
  the 
  other 
  lot 
  of 
  eggs 
  — 
  that 
  taken 
  from 
  the 
  middle 
  of 
  

   the 
  oviduct 
  and 
  from 
  the 
  uterus 
  — 
  the 
  spindles 
  are 
  also 
  radial. 
  

  

  