﻿MARINE 
  POLYCHAETE 
  WORMS 
  — 
  PETTIBONE 
  

  

  331 
  

  

  Figure 
  37. 
  — 
  Terebellidae 
  : 
  a, 
  Leaena 
  abranchiata, 
  lateral 
  view 
  anterior 
  end; 
  b, 
  same, 
  notoseta; 
  

   c, 
  Lanassa 
  venusta, 
  notoseta; 
  d, 
  Thelepus 
  cincinnatus, 
  avicular 
  uncinus; 
  e, 
  Polycirrus 
  

   medusa, 
  dorsal 
  view 
  anterior 
  end;/, 
  same, 
  ventral 
  view 
  anterior 
  end; 
  g, 
  Trichobranchus 
  

   glacialis, 
  dorsal 
  view 
  anterior 
  end; 
  h, 
  same, 
  thoracic 
  aciculiform 
  uncinus; 
  i, 
  same, 
  abdom- 
  

   inal 
  avicular 
  uncinus; 
  ;', 
  Terebellides 
  stroemii, 
  lateral 
  view 
  anterior 
  end; 
  k, 
  same, 
  crotchet 
  

   from 
  first 
  unciniger; 
  /, 
  same, 
  thoracic 
  aciculiform 
  uncinus; 
  m, 
  same, 
  abdominal 
  avicular 
  

   uncinus. 
  (For 
  explanation 
  of 
  symbols, 
  see 
  p. 
  210.) 
  

  

  261112—54- 
  

  

  