﻿NOTES 
  ON 
  THE 
  ANA'l'OMY 
  OF 
  GAZELLETTA. 
  

  

  485 
  

  

  that 
  the 
  body-wall 
  is 
  not 
  also 
  continuous 
  with 
  the 
  edge 
  of 
  

   the 
  diaphragm, 
  a 
  condition 
  which 
  seemed 
  to 
  be 
  probable 
  in 
  

   Planktonetta. 
  The 
  attachment 
  being 
  so 
  slight, 
  one 
  naturally 
  

   finds 
  numerous 
  separate 
  heads 
  and 
  bodies, 
  but 
  only 
  a 
  few 
  

   specimens 
  in 
  which 
  they 
  are 
  still 
  united 
  ; 
  the 
  separation 
  takes 
  

   place 
  between 
  diaphragm 
  and 
  central 
  capsule. 
  If 
  one 
  has 
  

  

  Oral 
  

  

  Posterior 
  

  

  epr. 
  

  

  Anterior 
  

  

  -- 
  c.c. 
  

  

  -CL, 
  

  

  Tig. 
  2. 
  — 
  Diaj^rammatic 
  section 
  of 
  the 
  central 
  portion 
  of 
  a 
  specimen 
  

   witii 
  thin 
  body-wall, 
  founded 
  on 
  camera 
  drawings, 
  a. 
  Oblique 
  

   sections 
  of 
  arms; 
  c.c. 
  body-wall 
  (cent.ral 
  capsule?) 
  perforated 
  

   above 
  by 
  suspensory 
  processes 
  and 
  by 
  tlie 
  bundle 
  of 
  communica- 
  

   ting 
  tubes 
  between 
  extra- 
  and 
  intra-capsular 
  protoplasm 
  ; 
  d. 
  

   diaphragm; 
  cp. 
  r. 
  extra-capsular 
  protoplasm 
  free 
  from 
  phaeodial 
  

   corpuscles, 
  protruding 
  from 
  under 
  the 
  siiell; 
  centrally 
  it 
  siiows 
  

   portions 
  of 
  the 
  tubes 
  by 
  which 
  it 
  communicates 
  with 
  the 
  

   interior 
  of 
  the 
  capsule 
  ; 
  in 
  the 
  remainder 
  of 
  the 
  extra-capsular 
  

   protoplasm 
  the 
  pligeodial 
  corpuscles 
  and 
  portions 
  of 
  liie 
  skeletal 
  

   meshwork 
  are 
  diagrammatically 
  indicated 
  ; 
  i. 
  p. 
  r. 
  intra-capsular 
  

   protoplasm 
  containing 
  the 
  large 
  nucleus 
  ; 
  m. 
  skeletal 
  meshwork 
  

   between 
  ihe 
  arms, 
  which 
  apparently 
  serves 
  for 
  the 
  attachment 
  

   of 
  the 
  diaphragm 
  ; 
  sh. 
  shell. 
  

  

  either 
  body 
  or 
  head 
  alone 
  before 
  one, 
  it 
  is 
  not 
  possible 
  to 
  

   infer 
  the 
  existence 
  of 
  the 
  other 
  part. 
  The 
  intra-capsular 
  

  

  