﻿306 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  RIUSEUM 
  vol. 
  103 
  

  

  Alaskan 
  Arctic, 
  Greenland, 
  Jan 
  Mayen, 
  Spitsbergen, 
  White 
  Sea, 
  

   Novaya 
  Zemlya, 
  Kara 
  Sea, 
  Also 
  Bering 
  Sea 
  to 
  Lower 
  California; 
  

   north 
  Japan 
  Sea; 
  Iceland, 
  Norway 
  to 
  English 
  Channel, 
  Santander; 
  

   Labrador 
  to 
  Massachusetts; 
  South 
  Africa. 
  In 
  low 
  water 
  to 
  1,400 
  

   fathoms. 
  

  

  Nicomache 
  personata 
  Johnson, 
  1901 
  

  

  Figure 
  34, 
  k 
  

  

  Nicomache 
  personata 
  Johnson, 
  1901, 
  p. 
  419, 
  pi. 
  13, 
  figs. 
  134-139. 
  — 
  Arwidsson, 
  

  

  1922, 
  p. 
  7, 
  pi. 
  1, 
  figs. 
  5, 
  6.— 
  Hartman, 
  1948, 
  p. 
  41, 
  fig. 
  11, 
  d-g.— 
  Berkeley 
  

  

  and 
  Berkeley, 
  1952, 
  p. 
  54, 
  figs. 
  109, 
  110. 
  

   Nicomache 
  minor 
  Arwidsson, 
  1907, 
  p. 
  100, 
  pi. 
  2, 
  figs. 
  68-73; 
  pi. 
  8, 
  figs. 
  252-256. 
  — 
  

  

  Augener, 
  1928, 
  p. 
  765.— 
  Annenkova, 
  1937, 
  p. 
  181; 
  1938, 
  p. 
  193. 
  

   Nicomache 
  maculata 
  Arwidsson, 
  1911b, 
  p. 
  209, 
  pi. 
  18, 
  figs. 
  13-19; 
  pi. 
  19, 
  figs. 
  

  

  27-30.— 
  Fauvel, 
  1927, 
  p. 
  191, 
  fig. 
  66, 
  k-r. 
  

  

  Description. 
  — 
  Up 
  to 
  110 
  mm. 
  long, 
  2 
  mm. 
  wide, 
  22 
  or 
  23 
  setigerous 
  

   segments, 
  single 
  achaetous 
  antanal 
  segment 
  (Point 
  Barrow 
  specimen 
  

   with 
  23 
  setigers, 
  Puget 
  Sound 
  specimen 
  with 
  22). 
  Prostomium 
  with 
  

   numerous 
  ocelli 
  (may 
  be 
  absent) 
  ; 
  nuchal 
  clefts 
  short, 
  arched. 
  Pygidial 
  

   funnel 
  with 
  16-26 
  papillae 
  which 
  are 
  short, 
  subequal, 
  triangular, 
  or 
  

   very 
  unequal, 
  some 
  being 
  longer, 
  some 
  very 
  short, 
  few 
  may 
  be 
  bifid 
  

   or 
  trifid. 
  Color: 
  In 
  alcohol: 
  Without 
  color, 
  or 
  brownish, 
  especially 
  

   on 
  anterior 
  end. 
  Tube 
  : 
  Thick 
  walls 
  of 
  coarse 
  sand 
  particles 
  cemented 
  

   together. 
  

  

  New 
  records. 
  — 
  Arctic 
  Alaska: 
  Off 
  Point 
  Barrow 
  base, 
  up 
  to 
  8 
  

   miles 
  from 
  shore, 
  21.7-75.5 
  fms., 
  on 
  various 
  combinations 
  of 
  pebbles, 
  

   rocks, 
  gravel, 
  stones 
  (3 
  stations, 
  5 
  specimens). 
  Bering 
  Sea: 
  Alba- 
  

   tross 
  Sta. 
  3289, 
  56° 
  44' 
  N., 
  159° 
  16' 
  W., 
  16 
  fms., 
  1890. 
  West 
  Coast 
  

   North 
  America 
  : 
  Security 
  Bay, 
  Alaska, 
  Jones; 
  Washington 
  and 
  Puget 
  

   Sounds, 
  low 
  water 
  to 
  61 
  fms., 
  Pettiboiie. 
  

  

  Distribution. 
  — 
  Arctic 
  Alaska, 
  Spitsbergen; 
  Bering 
  Sea 
  to 
  Washing- 
  

   ton; 
  north 
  Japan 
  Sea; 
  Scandinavia, 
  Ireland, 
  North 
  Sea 
  to 
  English 
  

   Channel. 
  In 
  low 
  water 
  to 
  75.5 
  fathoms. 
  

  

  Genus 
  Petaloproctus 
  Quatrefages, 
  1865 
  

  

  Petaloproctus 
  tenuis 
  (Theel, 
  1879) 
  

  

  Figure 
  34, 
  I, 
  m 
  

  

  Maldane 
  tenuis 
  Th^el, 
  1879, 
  p. 
  57, 
  pi. 
  4, 
  figs. 
  52-54. 
  

  

  Maldane 
  filifera 
  Verrill, 
  1879, 
  p. 
  179. 
  

  

  Petaloproctus 
  tenuis 
  Arwidsson, 
  1907, 
  p. 
  114, 
  pi. 
  6, 
  fig. 
  190a. 
  — 
  Annenkova, 
  1937, 
  

  

  p. 
  181; 
  1938, 
  p. 
  193.— 
  Zatsepin, 
  1948, 
  p. 
  145, 
  pi. 
  34, 
  fig. 
  5.— 
  Wesenberg-Lund, 
  

  

  1948, 
  p. 
  31.— 
  Berkeley 
  and 
  Berkeley, 
  1952, 
  p. 
  55, 
  fig. 
  113. 
  

   Petaloproctus 
  tenuis 
  var. 
  borealis 
  Arwidsson, 
  1907, 
  p. 
  118, 
  pi. 
  3, 
  figs. 
  85-90; 
  pi. 
  8, 
  

  

  figs. 
  268-272.— 
  Eliason, 
  1920, 
  p. 
  66.— 
  Hartman, 
  1948, 
  p. 
  42.— 
  Berkeley 
  and 
  

  

  Berkeley, 
  1952, 
  p. 
  56, 
  figs. 
  114-116. 
  

   Petaloproctus 
  filifer 
  Hartman, 
  1942b, 
  p. 
  131, 
  fig. 
  11, 
  a-b. 
  

  

  