﻿330 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  los 
  

  

  Distribution. 
  — 
  Widely'^distributed 
  in 
  the 
  Arctic: 
  Alaskan 
  Arctic, 
  

   Greenland, 
  Spitsbergen, 
  Novaya 
  Zemlya, 
  Kara 
  Sea. 
  Also 
  Iceland, 
  

   Faroes, 
  Swedish 
  west 
  coast 
  to 
  Spain, 
  Canary 
  Islands, 
  Mediterranean; 
  

   Maine 
  to 
  Massachusetts; 
  British 
  Columbia; 
  north 
  Japan 
  Sea. 
  Var. 
  

   antarcticus: 
  Magellan 
  Straits, 
  South 
  Georgia, 
  Ross 
  Island, 
  Kaiser 
  

   Wilhehn 
  II 
  Land. 
  In 
  3-1,517 
  fathoms. 
  

  

  Genus 
  Terehellides 
  M. 
  Sars, 
  1835 
  

   Terebellides 
  stroetnii 
  M. 
  Sars, 
  1835 
  

  

  FiQUEB 
  37, 
  j-m 
  

  

  Terebellides 
  stroemii 
  M. 
  Sars, 
  1835, 
  p. 
  48, 
  pi. 
  13, 
  fig. 
  31. 
  — 
  Malmgren, 
  1865, 
  p 
  

   396, 
  pi. 
  20, 
  fig. 
  48.— 
  Webster 
  and 
  Benedict, 
  1887, 
  p. 
  750.— 
  Moore, 
  1903, 
  p 
  

   478; 
  1908, 
  p. 
  352; 
  1923, 
  p. 
  199.— 
  Hessle, 
  1917, 
  p. 
  137.— 
  Chamberlin, 
  1920 
  

   p. 
  23.— 
  Eliason, 
  1920, 
  p. 
  72.— 
  Fauvel, 
  1927, 
  p. 
  291, 
  fig. 
  100, 
  i-q; 
  1932, 
  p 
  

   234; 
  1947, 
  p. 
  79, 
  fig. 
  76, 
  f-i.— 
  Augener, 
  1928, 
  p. 
  797.— 
  Gustafson, 
  1936, 
  p 
  

   9.— 
  Annenkova, 
  1937, 
  p. 
  190; 
  1938, 
  p. 
  202.— 
  Treadwell, 
  1937, 
  p. 
  35.— 
  Okuda, 
  

   1938b, 
  p. 
  102.— 
  Friedrich, 
  1939, 
  p. 
  127.— 
  Berkeley 
  and 
  Berkeley, 
  1943, 
  p 
  

   130; 
  1944, 
  p. 
  5; 
  1952, 
  p. 
  75, 
  figs. 
  152, 
  153.— 
  Hartman, 
  1944a, 
  pp. 
  336, 
  343 
  

   1944d, 
  p. 
  24; 
  1951, 
  p. 
  113.— 
  Thorson, 
  1946, 
  p. 
  124, 
  fig. 
  69.— 
  Gorbunov, 
  1946 
  

   p. 
  39.— 
  Zatsepin, 
  1948, 
  p. 
  153, 
  pi. 
  38, 
  fig. 
  3.— 
  St0p-Bowitz, 
  1948c, 
  p. 
  68.— 
  

   Wesenberg-Lund, 
  1949, 
  p. 
  355; 
  1950a, 
  p. 
  55; 
  1950b, 
  p. 
  126; 
  1951, 
  p. 
  115, 
  fig 
  

   11. 
  — 
  Hartman 
  and 
  Reish, 
  1950, 
  p. 
  44. 
  

  

  Terebellides 
  stroemii 
  var. 
  japonica 
  Moore, 
  1903, 
  p. 
  478; 
  1908, 
  p. 
  352; 
  1923, 
  p. 
  200 
  

  

  Description. 
  — 
  Length 
  up 
  to 
  75 
  mm., 
  width 
  8 
  mm., 
  segments 
  50-60 
  

   Prostomium 
  and 
  buccal 
  segment 
  forming 
  large, 
  transverse, 
  crescent- 
  

   shaped 
  plate 
  below 
  mouth, 
  large 
  and 
  undulating 
  tentacular 
  membrane 
  

   with 
  numerous, 
  short, 
  grooved 
  tentacles, 
  folded 
  upper 
  lip; 
  dorsaUy 
  

   without 
  cephalic 
  ridge 
  or 
  eye-spots. 
  Segment 
  2 
  short, 
  achaetous. 
  

   Single 
  branchia 
  formed 
  of 
  large 
  cylindrical 
  trunk 
  dorsally 
  on 
  segment 
  

   3 
  (first 
  setiger) 
  and 
  four 
  pectinate 
  lobes, 
  frequently 
  interlocked 
  giving 
  

   appearance 
  of 
  more 
  or 
  less 
  solid 
  mass. 
  With 
  somewhat 
  developed 
  

   lateral 
  lobes 
  extending 
  ventraUy 
  on 
  segments 
  2-7 
  (larger 
  on 
  segments 
  

   3-6). 
  Thoracic 
  setigers 
  18, 
  begin 
  on 
  segment 
  3. 
  Uncini 
  begin 
  on 
  

   segment 
  8 
  (setiger 
  6), 
  those 
  on 
  first 
  unciniger 
  consisting 
  of 
  crotchets 
  

   with 
  long 
  manubrium 
  and 
  bent, 
  pointed 
  tips, 
  those 
  on 
  rest 
  of 
  thoracic 
  

   segments 
  long, 
  aciculiform, 
  with 
  large 
  fang 
  and 
  few 
  denticles; 
  may 
  be 
  

   crowded 
  in 
  more 
  than 
  one 
  row 
  in 
  large 
  specimens. 
  Abdominal 
  

   uncini 
  short, 
  avicular, 
  pectiniform, 
  in 
  single 
  rows 
  on 
  projecting 
  tri- 
  

   angular 
  pinnules. 
  Prominent 
  paired 
  nephridial 
  papillae 
  on 
  segment 
  3, 
  

   smaller 
  ones 
  on 
  segments 
  6 
  and 
  7. 
  Pygidium 
  with 
  terminal 
  anus, 
  with 
  

   sides 
  crenulate. 
  Female 
  with 
  large 
  yolky 
  eggs 
  (ripe 
  eggs 
  and 
  sperm, 
  

   September 
  26, 
  1949). 
  Color: 
  In 
  life: 
  Body 
  orange, 
  branchia 
  orange- 
  

   red, 
  tentacles 
  tan. 
  In 
  alcohol: 
  Colorless, 
  with 
  smooth 
  iridescent 
  

   surface. 
  

  

  Parasites. 
  — 
  One 
  of 
  the 
  87 
  specimens 
  had 
  the 
  parasitic 
  copepod 
  

   Saccopsis 
  terebellidis 
  Levinsen 
  (identified 
  by 
  P. 
  L. 
  lUg) 
  attached 
  to 
  

  

  