﻿288 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  TOL.108 
  

  

  In 
  epitokous 
  phase, 
  dorsal 
  setae 
  in 
  anterior 
  region 
  much 
  longer; 
  ia 
  

   posterior 
  region, 
  parapodial 
  tori 
  more 
  projecting, 
  dorsal 
  and 
  ventral 
  

   acicular 
  crotchets 
  forming 
  semicircular, 
  fan-shaped 
  group, 
  almost 
  en- 
  

   circHng 
  body. 
  Pygidium 
  with 
  small, 
  rounded 
  to 
  conical 
  lobe, 
  ventral 
  

   and 
  posterior 
  to 
  anus 
  (like 
  a 
  cover 
  for 
  anal 
  opening). 
  Color: 
  In 
  

   alcohol: 
  Light 
  to 
  dark 
  gray, 
  brownish, 
  or 
  iridescent 
  bluish 
  black. 
  

  

  New 
  records. 
  — 
  Arctic 
  Alaska: 
  Off 
  Point 
  Barrow 
  base, 
  up 
  to 
  12.1 
  

   miles 
  from 
  shore, 
  20-123.5 
  fms., 
  on 
  various 
  combinations 
  of 
  mud, 
  

   stones, 
  gravel, 
  rocks, 
  large 
  perforated 
  rocks, 
  mass 
  of 
  worm 
  tubes, 
  on 
  

   surface 
  of 
  tunicates 
  (12 
  stations, 
  29 
  specimens). 
  East 
  Coast 
  North 
  

   America: 
  Off 
  Labrador, 
  95-125 
  fms.. 
  Blue 
  Dolphin 
  Expedition, 
  1949; 
  

   off 
  Maine, 
  New 
  Hampshire, 
  Massachusetts, 
  11-58 
  fms., 
  U. 
  S. 
  Fish 
  

   Commission. 
  

  

  Distribution. 
  — 
  Widely 
  distributed 
  in 
  the 
  Arctic: 
  Siberian 
  and 
  

   Alaskan 
  Arctic, 
  Davis 
  Strait, 
  Greenland, 
  Spitsbergen, 
  Franz 
  Josef 
  

   Land, 
  Barents 
  Sea, 
  Novaya 
  Zemlya. 
  Also 
  Iceland, 
  Faroes, 
  Norway 
  

   to 
  Canary 
  Islands, 
  Mediterranean, 
  Adriatic, 
  Gulf 
  of 
  Aden; 
  Labrador 
  

   to 
  Massachusetts; 
  Bering 
  Sea 
  to 
  British 
  Columbia; 
  north 
  Japan 
  Sea. 
  

   Southern 
  latitudes: 
  Falkland 
  Islands, 
  Magellan 
  Straits, 
  Kerguelen. 
  

   In 
  low 
  water 
  to 
  1,333 
  fathoms; 
  surface. 
  

  

  Family 
  Flabelligeridae 
  (Chloraemidae) 
  

  

  Body 
  subcylindrical 
  or 
  subfusiform, 
  with 
  short 
  similar 
  segments 
  

   covered 
  with 
  papillae, 
  often 
  with 
  adherent 
  sand 
  grains, 
  may 
  be 
  

   encased 
  in 
  thick 
  mucous 
  mantle. 
  Prostomium 
  and 
  buccal 
  segment 
  

   fused, 
  with 
  two 
  thick 
  grooved 
  palps, 
  two 
  groups 
  of 
  filiform 
  cephalic 
  

   branchiae, 
  and 
  more 
  or 
  less 
  developed 
  buccal 
  tube 
  around 
  mouth, 
  

   all 
  of 
  which 
  may 
  be 
  partially 
  or 
  completely 
  retracted 
  within 
  anterior 
  

   setigers, 
  with 
  or 
  without 
  setae 
  of 
  anterior 
  setigers 
  directed 
  anteriorly 
  

   forming 
  a 
  cephaUc 
  cage. 
  Parapodia 
  biramous; 
  notosetae 
  simple, 
  

   capillary, 
  ringed; 
  neurosetae 
  simple 
  or 
  pseudocompound, 
  capillary 
  

   or 
  hooked. 
  Without 
  dorsal, 
  ventral, 
  or 
  anal 
  cirri. 
  Anus 
  terminal. 
  

   Usually 
  in 
  muddy 
  sand. 
  

  

  Represented 
  by 
  two 
  genera 
  and 
  three 
  species 
  from 
  Point 
  Barrow. 
  

  

  Key 
  to 
  the 
  genera 
  of 
  Flabelligeridae 
  from 
  Point 
  Barrow 
  

  

  1. 
  Body 
  covered 
  with 
  long 
  pedunculate 
  papillae 
  (fig. 
  33, 
  g), 
  usually 
  encased 
  in 
  

   thick 
  mucous 
  mantle. 
  Fused 
  prostomium 
  and 
  buccal 
  segment 
  partially 
  

   retractile 
  within 
  first 
  setigers 
  and 
  more 
  or 
  less 
  hidden 
  by 
  cephalic 
  cage 
  formed 
  

   by 
  setae 
  of 
  first 
  setiger, 
  the 
  setae 
  long, 
  directed 
  anteriorly, 
  almost 
  completely 
  

  

  encircling 
  segment 
  Flabelligera 
  (p. 
  289) 
  

  

  Body 
  covered 
  with 
  short 
  papillae, 
  usually 
  encrusted 
  with 
  sand, 
  not 
  encased 
  

   in 
  mucous 
  mantle. 
  Fused 
  prostomium 
  and 
  buccal 
  segment 
  completely 
  

   retractile 
  within 
  anterior 
  setigers, 
  may 
  be 
  completely 
  hidden; 
  without 
  

   cephalic 
  cage 
  formed 
  by 
  anterior 
  setigers; 
  when 
  buccal 
  segment, 
  etc. 
  are 
  

   retracted, 
  anterior 
  end 
  is 
  trilobed 
  (fig. 
  33, 
  h) 
  Brada 
  (p. 
  290) 
  

  

  