﻿332 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  anterior 
  part 
  in 
  the 
  region 
  of 
  the 
  branchia. 
  The 
  same 
  polychaete 
  and 
  

   copepod 
  species 
  were 
  found 
  in 
  Iceland 
  waters 
  and 
  figured 
  by 
  Wesen- 
  

   berg-Lund 
  (1951, 
  p. 
  117, 
  fig. 
  11). 
  

  

  New 
  records. 
  — 
  Arctic 
  Alaska: 
  West 
  side 
  Elson 
  Lagoon 
  near 
  Point 
  

   Barrow, 
  1.2 
  fms,; 
  Eluitkak 
  Pass, 
  Elson 
  Lagoon; 
  Point 
  Barrow 
  base, 
  

   washed 
  ashore; 
  off 
  Point 
  Barrow 
  base, 
  up 
  to 
  15 
  miles 
  from 
  shore, 
  18.3- 
  

   123.5 
  fms., 
  on 
  bottoms 
  of 
  mud, 
  stones, 
  mass 
  of 
  worm 
  tubes, 
  and 
  various 
  

   combinations 
  of 
  mud, 
  sand, 
  pebbles, 
  gravel, 
  stones, 
  rocks, 
  large 
  per- 
  

   forated 
  rocks, 
  with 
  shells, 
  bryozoans, 
  worm 
  tubes 
  (26 
  stations, 
  87 
  

   specimens). 
  West 
  Coast 
  North 
  America: 
  Washington 
  and 
  Puget 
  

   Sounds, 
  10-165 
  fms., 
  Pettibone. 
  East 
  Coast 
  North 
  America: 
  Off 
  

   Labrador, 
  5-65 
  fms.. 
  Blue 
  Dolphin 
  Expeditions, 
  1949, 
  1950; 
  off 
  Nova 
  

   Scotia, 
  Maine, 
  Massachusetts, 
  Rhode 
  Island, 
  Long 
  Island 
  Sound, 
  

   6-368 
  fms., 
  U. 
  S. 
  Fish 
  Commission. 
  

  

  Distribution. 
  — 
  Widely 
  distributed 
  in 
  the 
  Arctic: 
  Siberian, 
  Alaskan, 
  

   and 
  Canadian 
  Arctic, 
  Greenland, 
  Jan 
  Mayen, 
  Spitsbergen, 
  Franz 
  

   Josef 
  Land, 
  Barents 
  Sea, 
  White 
  Sea, 
  Novaya 
  Zemlya, 
  Kara 
  Sea. 
  Also 
  

   Iceland, 
  Faroes, 
  Norway 
  to 
  Portugal, 
  Mediterranean, 
  Adriatic, 
  Black 
  

   Sea; 
  Hudson 
  Bay 
  to 
  Long 
  Island 
  Sound, 
  Gulf 
  of 
  Mexico, 
  West 
  Indies; 
  

   Bering 
  Sea 
  to 
  southern 
  California, 
  Panamd, 
  Venezuela; 
  north 
  Japan 
  

   Sea 
  to 
  Japan; 
  Iranian 
  Gulf; 
  Indian 
  Ocean; 
  South 
  Africa, 
  Bouvet 
  

   Island, 
  Kerguelen, 
  New 
  Caledonia. 
  In 
  low 
  water 
  to 
  1,611 
  fathoms. 
  

  

  Family 
  Sabellidae 
  

  

  Body 
  cylindrical, 
  tapered 
  posteriorly. 
  Prostomium 
  indistinct. 
  

   Buccal 
  region 
  with 
  mouth 
  terminal, 
  with 
  dorsal 
  lip, 
  two 
  ventral 
  lips 
  

   or 
  vesicular 
  bulbs, 
  two 
  fleshy, 
  membranous 
  or 
  filiform 
  palps 
  of 
  variable 
  

   length. 
  Branchiae 
  form 
  conspicuous, 
  often 
  highly 
  colored 
  terminal 
  

   funnellike 
  plume 
  surrounding 
  mouth; 
  plume 
  formed 
  of 
  two 
  semi- 
  

   circular 
  or 
  spiral 
  lobes 
  bearing 
  numerous 
  filaments 
  each 
  with 
  two 
  rows 
  

   of 
  ciliated 
  barbules 
  (fig. 
  38, 
  a). 
  Branchiae 
  without 
  operculum. 
  A 
  

   collarette 
  more 
  or 
  less 
  developed 
  on 
  first 
  segment. 
  Body 
  divided 
  

   into 
  two 
  regions: 
  (1) 
  thoracic; 
  few 
  segments 
  (4-12), 
  with 
  dorsal 
  bun- 
  

   dles 
  of 
  capillary 
  setae 
  and 
  ventral 
  uncinigerous 
  tori 
  (tori 
  lacking 
  in 
  

   Myxicola); 
  without 
  thoracic 
  membrane; 
  (2) 
  abdominal; 
  with 
  inversion 
  

  

  Figure 
  38. 
  — 
  Sabellidae: 
  a, 
  Sabella 
  crassicornis, 
  lateral 
  view 
  anterior 
  end; 
  b, 
  same, 
  tip 
  

   of 
  branchial 
  filament; 
  c, 
  same, 
  thoracic 
  notosetae; 
  d, 
  same, 
  dorsal 
  view 
  pygidium;^, 
  same, 
  

   thoracic 
  hoe-like 
  seta 
  from 
  ventral 
  torus;/, 
  same, 
  thoracic 
  avicular 
  uncinus 
  from 
  ventral 
  

   torus; 
  g, 
  same, 
  ventral 
  view 
  collarette; 
  h, 
  same, 
  lateral 
  view; 
  i, 
  same, 
  dorsal 
  view; 
  /, 
  Pot- 
  

   amilla 
  neglecta, 
  dorsal 
  view 
  collarette; 
  k, 
  same, 
  lateral 
  view; 
  /, 
  same, 
  ventral 
  view; 
  m, 
  

   same, 
  dorsal 
  thoracic 
  limbate 
  seta; 
  n, 
  same, 
  dorsal 
  thoracic 
  spatulate 
  setae; 
  o, 
  Potamilla 
  

   reniformis, 
  ventral 
  view 
  collarette; 
  p, 
  same, 
  lateral 
  view; 
  q, 
  same, 
  dorsal 
  view; 
  r, 
  same, 
  

   portion 
  of 
  branchial 
  filament; 
  s, 
  same, 
  thoracic 
  avicular 
  uncinus 
  from 
  ventral 
  torus; 
  t, 
  

   same, 
  thoracic 
  hoe-like 
  seta 
  from 
  ventral 
  torus; 
  «, 
  same, 
  tip 
  of 
  tube, 
  rolled 
  at 
  free 
  end. 
  

   (For 
  explanation 
  of 
  symbols, 
  see 
  p. 
  210.) 
  

  

  