﻿314 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  Iceland, 
  Faroes; 
  Labrador 
  to 
  Long 
  Island 
  Sound; 
  Bering 
  Sea 
  to 
  western 
  

   Mexico; 
  north 
  Japan 
  Sea. 
  In 
  low 
  water 
  to 
  190 
  fathoms. 
  

  

  Pectinaria 
  (Cistenides) 
  hyperborea 
  (Malmgren, 
  1865) 
  

  

  FiGUKE 
  35, 
  c-h 
  

  

  Cistenides 
  hyperborea 
  Malmgren, 
  1865, 
  p. 
  360, 
  pi. 
  18, 
  fig. 
  40. 
  — 
  Moore, 
  1903, 
  p. 
  479. 
  — 
  

   Fauvel, 
  1914, 
  p. 
  277, 
  pi. 
  26, 
  figs. 
  27, 
  28.— 
  Augener, 
  1928, 
  p. 
  775.— 
  Berkeley 
  

   and 
  Berkeley, 
  1942, 
  p. 
  201. 
  — 
  Wesenberg-Lund, 
  1950a, 
  p. 
  46; 
  1950b, 
  p. 
  106; 
  

   1951, 
  p. 
  100. 
  

  

  Pectinaria 
  (Cistenides) 
  hyperborea 
  Hessle, 
  1917, 
  p. 
  76. 
  — 
  Nilsson, 
  1928, 
  p. 
  31, 
  fig. 
  

   9.— 
  Gustafson, 
  1936, 
  p. 
  8.— 
  Okuda, 
  1937b, 
  p. 
  56, 
  fig. 
  5; 
  pi. 
  2, 
  fig. 
  F.— 
  Annen- 
  

   kova, 
  1937, 
  p. 
  186; 
  1938, 
  p. 
  197.— 
  Zatsepin, 
  1948, 
  p. 
  147, 
  pi. 
  37, 
  fig. 
  4. 
  

  

  Description. 
  — 
  Body 
  28-55 
  nun. 
  long, 
  6-12 
  mm. 
  wide. 
  Tube 
  45-72 
  

   mm. 
  long, 
  7-10 
  mm. 
  in 
  greatest 
  diameter, 
  formed 
  of 
  fine 
  sand 
  grains 
  

   plus 
  some 
  coarser 
  ones. 
  Paleae 
  usually 
  11-14 
  pairs 
  (9-15), 
  long, 
  

   tapered 
  to 
  slender 
  tips. 
  Scaphal 
  hooks 
  taper 
  gradually, 
  without 
  

   distinct 
  shoulder. 
  

  

  New 
  records. 
  — 
  Arctic 
  Alaska: 
  Off 
  Point 
  Barrow 
  base, 
  up 
  to 
  15 
  

   miles 
  from 
  shore, 
  6-123.5 
  fms., 
  on 
  bottoms 
  of 
  mud, 
  mass 
  of 
  worm 
  

   tubes, 
  and 
  various 
  combinations 
  of 
  mud, 
  gravel, 
  stones, 
  rocks, 
  with 
  

   shells, 
  worm 
  tubes; 
  from 
  fish 
  trap 
  (8 
  stations, 
  19 
  specimens). 
  Bering 
  

   Sea: 
  Albatross 
  Sta. 
  3610, 
  55°58' 
  N., 
  167°16' 
  W., 
  75 
  fms., 
  mud, 
  1895. 
  

   Alaska: 
  Albatross 
  Sta. 
  4244, 
  Kasaan 
  Bay, 
  Prince 
  of 
  Wales 
  Island, 
  

   50-54 
  fms. 
  West 
  Greenland: 
  Godhavn, 
  U.S.S. 
  Alert, 
  1884. 
  East 
  

   Coast 
  North 
  America: 
  Off 
  Labrador, 
  8-125 
  fms.. 
  Blue 
  Dolphin 
  

   Expeditions, 
  1949, 
  1950, 
  1951; 
  off 
  Nova 
  Scotia, 
  Maine, 
  Massachusetts, 
  

   16-65 
  fms., 
  U. 
  S. 
  Fish 
  Commission. 
  

  

  Distribution. 
  — 
  Widely 
  distributed 
  in 
  the 
  Arctic: 
  Siberian 
  and 
  

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

   Also 
  Iceland, 
  Norway 
  to 
  Danish 
  waters. 
  North 
  Sea; 
  Labrador 
  to 
  

   Massachusetts; 
  Bering 
  Sea 
  to 
  Alaska; 
  north 
  Japan 
  Sea 
  to 
  Japan. 
  

   In 
  1.5-379 
  fathoms. 
  

  

  Family 
  Ampharetidae 
  

  

  Prostomium 
  (or 
  tentacular 
  membrane) 
  more 
  or 
  less 
  distinctly 
  

   trilobed, 
  with 
  numerous 
  filiform 
  oral 
  tentacles, 
  smooth 
  or 
  pinnate, 
  

   retractile 
  in 
  mouth 
  (fig. 
  36, 
  a, 
  b, 
  e). 
  Branchiae 
  filiform 
  or 
  subulate 
  

   (rarely 
  pinnate), 
  two 
  to 
  four 
  pairs, 
  inserted 
  on 
  dorsal 
  part 
  of 
  first 
  

   setigerous 
  segments. 
  First 
  few 
  segments 
  achaetous, 
  with 
  or 
  without 
  

   special 
  group 
  of 
  setae 
  or 
  paleae 
  anterior 
  to 
  branchiae. 
  Body 
  divided 
  

   into 
  two 
  distinct 
  regions: 
  (1) 
  thoracic; 
  conical 
  notopodia 
  with 
  smooth, 
  

   limbate 
  capillary 
  setae 
  and, 
  beginning 
  on 
  setigers 
  3 
  or 
  4, 
  with 
  neuro- 
  

   podial 
  flattened 
  pinnules 
  bearing 
  a 
  row 
  of 
  pectiniform 
  uncini; 
  (2) 
  

   abdominal; 
  uncinigerous 
  pinnules 
  only. 
  With 
  or 
  without 
  dorsal. 
  

  

  