﻿MARINE 
  POLYCHAETE 
  WORMS 
  — 
  PETTIBONE 
  339 
  

  

  Sea. 
  Also 
  Iceland, 
  Faroes, 
  Shetlands, 
  Scandinavian 
  coast 
  to 
  Danish 
  

   waters; 
  Hudson 
  Bay 
  to 
  Rhode 
  Island; 
  Bering 
  Sea 
  to 
  California; 
  north 
  

   Japan 
  Sea. 
  In 
  low 
  water 
  to 
  1,955 
  fathoms. 
  

  

  Chone 
  dun^ri 
  Malmgren, 
  1867 
  

  

  Figure 
  39, 
  k, 
  I 
  

  

  Chone 
  dunSri 
  Malmgren, 
  1867, 
  p. 
  116, 
  pi. 
  13, 
  fig. 
  75.— 
  Wir^n, 
  1883, 
  p. 
  422.— 
  

   Fauvel, 
  1927, 
  p. 
  336, 
  fig. 
  117, 
  1-r; 
  1934a, 
  p. 
  74.— 
  Augener, 
  1928, 
  p. 
  807.— 
  

   Monro, 
  1936, 
  p. 
  189.— 
  Treadwell, 
  1937, 
  p. 
  35.— 
  Berkeley 
  and 
  Berkeley, 
  1944, 
  

   p. 
  5. 
  — 
  Zatsepin, 
  1948, 
  p. 
  164, 
  pi. 
  39, 
  fig. 
  15. 
  — 
  Wesenberg-Lund, 
  1950a, 
  p. 
  

   58; 
  1950b, 
  p. 
  130; 
  1951, 
  p. 
  123.— 
  Hartman, 
  1951, 
  p. 
  117. 
  

  

  Description. 
  — 
  Length 
  20-35 
  mm., 
  width 
  1.5-2.5 
  mm. 
  Collarette 
  

   oblique, 
  longer 
  on 
  ventral 
  side. 
  Branchial 
  filaments 
  about 
  10 
  (5-11), 
  

   with 
  long, 
  tapered 
  tips. 
  Color: 
  In 
  life: 
  Branchiae 
  yellow. 
  In 
  alco- 
  

   hol: 
  Colorless 
  or 
  tannish. 
  Tube: 
  Thin, 
  membranous, 
  encrusted 
  with 
  

   sand. 
  

  

  New 
  records. 
  — 
  ^ 
  Arctic 
  Alaska: 
  Off 
  Point 
  Barrow 
  base, 
  up 
  to 
  7.5 
  

   miles 
  from 
  shore, 
  13.3-49 
  fms., 
  on 
  bottoms 
  of 
  mud 
  and 
  various 
  com- 
  

   binations 
  of 
  mud, 
  sand, 
  gravel, 
  stones, 
  rocks, 
  large 
  perforated 
  rocks, 
  

   shells 
  (9 
  stations, 
  21 
  specimens). 
  Canadian 
  Arctic: 
  Baffin 
  Island, 
  

   66° 
  43' 
  N., 
  80° 
  07' 
  W., 
  Bartlett, 
  1927. 
  East 
  Coast 
  North 
  America: 
  

   Off 
  Labrador, 
  8 
  fms., 
  mud. 
  Blue 
  Dolphin 
  Expedition, 
  1949. 
  

  

  Distribution. 
  — 
  Widely 
  distributed 
  in 
  the 
  Arctic: 
  Alaskan 
  and 
  Ca- 
  

   nadian 
  Arctic, 
  Greenland, 
  Spitsbergen, 
  Novaya 
  Zemlya, 
  Kara 
  Sea. 
  

   Also 
  Iceland, 
  Faroes, 
  Norway 
  to 
  North 
  Sea, 
  Madeira, 
  Mediterranean, 
  

   Adriatic; 
  Labrador; 
  Florida; 
  west 
  coast 
  South 
  America 
  (Perii). 
  In 
  

   8-889 
  fathoms. 
  

  

  Genus 
  Euchone 
  Malmgren, 
  1865 
  

   Euchone 
  analis 
  (Kroyer, 
  1856) 
  

  

  Figure 
  39, 
  m, 
  n 
  

  

  Sabella 
  analis 
  KrSyer, 
  1856, 
  p. 
  17. 
  

  

  Euchone 
  analis 
  Malmgren, 
  1865, 
  p. 
  406, 
  pi. 
  28, 
  fig. 
  88.— 
  Th6el, 
  1879, 
  p. 
  65.— 
  

   Wir6n, 
  1883, 
  p. 
  423.— 
  Chamberlin, 
  1920, 
  p. 
  27.— 
  Augener, 
  1928, 
  p. 
  804.— 
  

   Annenkova, 
  1937, 
  p. 
  196; 
  1938, 
  p. 
  216.— 
  Berkeley 
  and 
  Berkeley, 
  1943, 
  p. 
  

   130; 
  1952, 
  p. 
  121, 
  figs. 
  250, 
  251.— 
  Gorbunov, 
  1946, 
  p. 
  39.— 
  Zatsepin, 
  1948, 
  

   p. 
  163, 
  pi. 
  39, 
  fig. 
  12.— 
  Wesenberg-Lund, 
  1950a, 
  p. 
  59; 
  1950b, 
  p. 
  132; 
  1951, 
  

   p. 
  124. 
  

  

  Description. 
  — 
  Length 
  19-28 
  mm., 
  width 
  1.8 
  mm. 
  (up 
  to 
  60 
  mm. 
  

   long 
  — 
  Augener, 
  1928). 
  Segments 
  biaimulate 
  and, 
  with 
  the 
  ventral 
  

   faecal 
  groove, 
  forming 
  four 
  large 
  areas 
  per 
  segment. 
  Collarette 
  

   with 
  opening 
  dorsally, 
  nearly 
  straight 
  and 
  entire 
  laterally, 
  with 
  

   shallow 
  midventral 
  incision. 
  Branchial 
  filaments 
  about 
  10 
  per 
  lobe 
  

   (up 
  to 
  14), 
  united 
  through 
  a 
  great 
  part 
  of 
  their 
  length 
  by 
  a 
  well- 
  

   developed 
  palmar 
  membrane. 
  Thoracic 
  setigers 
  8. 
  Ventral 
  anal 
  

  

  