﻿MARINE 
  POLYCHAETE 
  WORMS 
  — 
  PETTIBONE 
  

  

  243 
  

  

  Figure 
  28. 
  — 
  Hesionidae: 
  a, 
  Castalia 
  aphroditoides, 
  dorsal 
  view 
  anterior 
  end; 
  b, 
  same, 
  

   parapodium, 
  posterior 
  view. 
  Syllidae: 
  c, 
  Syllis 
  fasciata, 
  dorsal 
  view 
  anterior 
  end; 
  d, 
  

   same, 
  parapodium; 
  e, 
  same, 
  neuroseta; 
  /, 
  Syllis 
  cornuia, 
  neurosetae, 
  with 
  short 
  (1) 
  and 
  

   long 
  (2) 
  blades; 
  g, 
  Eusyllis 
  blomstrandi, 
  dorsal 
  view 
  anterior 
  end, 
  proboscis 
  partially 
  

   extended; 
  h, 
  same, 
  frontal 
  view 
  extended 
  proboscis 
  showing 
  distal 
  row 
  of 
  papillae 
  and 
  

   denticled 
  margin; 
  t, 
  same, 
  neuroseta; 
  /, 
  Pionosyllis 
  compacta, 
  neurosetae, 
  lower 
  one 
  (1) 
  

   with 
  shorter 
  blade, 
  upper 
  one 
  (2) 
  with 
  longer 
  blade; 
  k, 
  Exogoru 
  dispar, 
  dorsal 
  view 
  anterior 
  

   end; 
  /, 
  Exogone 
  naidina, 
  dorsal 
  view 
  anterior 
  end; 
  m, 
  Sphaerosyllis 
  erinaceus, 
  dorsal 
  view 
  

   anterior 
  end. 
  (For 
  explanation 
  of 
  symbols, 
  see 
  p. 
  210.) 
  

  

  