﻿MARINE 
  POLYCHAETE 
  WORMS 
  — 
  PETTIBONE 
  231 
  

  

  Nev) 
  records. 
  — 
  Arctic 
  Alaska: 
  Eluitkak 
  Pass, 
  Elson 
  Lagoon 
  near 
  

   Point 
  Barrow, 
  6.6 
  fms.; 
  off 
  Point 
  Barrow 
  base, 
  up 
  to 
  12.1 
  miles 
  from 
  

   shore, 
  16.7-123.5 
  fms., 
  on 
  bottoms 
  of 
  stones, 
  masses 
  of 
  worm 
  tubes, 
  

   and 
  various 
  combinations 
  of 
  mud, 
  gravel, 
  stones, 
  rocks, 
  large 
  per- 
  

   forated 
  rocks, 
  with 
  bryozoans, 
  hydroids; 
  from 
  screen 
  trap 
  through 
  

   hole 
  in 
  ice, 
  mud 
  (16 
  stations, 
  30 
  specimens). 
  West 
  Greenland: 
  

   Vaigat, 
  Disko 
  Island, 
  mud, 
  1937, 
  and 
  Walrus 
  grounds, 
  Murchison 
  

   Sound, 
  45 
  fms., 
  1938, 
  Bartlett. 
  East 
  Coast 
  North 
  America: 
  Off 
  

   Labrador, 
  6 
  fms.. 
  Blue 
  Dolphin 
  Expedition, 
  1949; 
  off 
  Nova 
  Scotia, 
  

   St. 
  Georges 
  Bank, 
  Maine, 
  Massachusetts, 
  Rhode 
  Island, 
  intertidal 
  to 
  

   110 
  fms., 
  U. 
  S. 
  Fish 
  Commission. 
  

  

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

   and 
  Canadian 
  Arctic, 
  Davis 
  Strait, 
  Greenland, 
  Jan 
  Mayen, 
  Norwegian 
  

   Sea, 
  Spitsbergen, 
  Franz 
  Josef 
  Land, 
  Novaya 
  Zemlya, 
  Kara 
  Sea. 
  

   Also 
  Iceland, 
  Faroes, 
  Shetlands, 
  Norway 
  to 
  northern 
  France 
  ; 
  Labrador 
  

   to 
  Rhode 
  Island; 
  Bering 
  Sea 
  to 
  southern 
  Oregon; 
  north 
  Japan 
  Sea; 
  

   off 
  South 
  Africa. 
  In 
  low 
  water 
  to 
  1,254 
  fathoms. 
  

  

  Family 
  Phyllodocidae 
  

  

  Prostomium 
  subcorneal, 
  suboval 
  or 
  cordiform, 
  with 
  two 
  eyes, 
  four 
  

   or 
  five 
  antennae, 
  without 
  palps 
  (fig. 
  27, 
  a-<i). 
  Anterior 
  segments 
  

   1-3 
  modified, 
  with 
  two 
  to 
  four 
  pairs 
  tentacular 
  cirri. 
  Parapodia 
  

   uniramous 
  (exceptionally 
  biramous); 
  setae 
  compound 
  (some 
  may 
  be 
  

   simple). 
  Dorsal 
  and 
  ventral 
  cirri 
  foliaceous 
  or 
  more 
  or 
  less 
  globular 
  

   (fig. 
  27, 
  e-4). 
  Two 
  anal 
  cirri. 
  Proboscis 
  eversible, 
  with 
  papillae, 
  

   unarmed. 
  Active; 
  mucus 
  secreted 
  in 
  quantities. 
  

  

  Represented 
  by 
  four 
  genera 
  and 
  seven 
  species. 
  All 
  genera 
  repre- 
  

   sented 
  have 
  uniramous 
  parapodia, 
  with 
  compound 
  setae. 
  

  

  Key 
  to 
  the 
  genera 
  of 
  PhyUodocidae 
  from 
  Point 
  Barrow 
  

  

  1. 
  Tentacular 
  cirri 
  4 
  pairs; 
  first 
  tentacular 
  segment 
  rudimentary, 
  not 
  visible 
  

   dorsally, 
  with 
  1 
  pair 
  tentacular 
  cirri 
  lateral 
  to 
  prostomium; 
  second 
  segment 
  

   distinct, 
  with 
  2 
  pairs 
  tentacular 
  cirri; 
  third 
  segment 
  distinct, 
  with 
  1 
  pair 
  

   tentacular 
  cirri, 
  1 
  pair 
  normal 
  ventral 
  cirri 
  (fig. 
  27, 
  c, 
  d) 
  2 
  

  

  Tentacular 
  cirri 
  3 
  pairs; 
  first 
  tentacular 
  segment 
  distinct 
  dorsally, 
  with 
  1 
  pair 
  

   tentacular 
  cirri; 
  second 
  segment 
  distinct, 
  with 
  2 
  pairs 
  tentacular 
  cirri 
  (fig. 
  

   27, 
  b). 
  Prostomium 
  oval, 
  without 
  occipital 
  tubercle 
  Mystides 
  (p. 
  232) 
  

  

  Tentacular 
  cirri 
  2 
  pairs 
  on 
  first 
  achaetous 
  segment 
  (fig. 
  27, 
  a) 
  . 
  Without 
  dorsal 
  

   cirri 
  on 
  second 
  segment 
  which 
  has 
  a 
  setigerous 
  lobe 
  (may 
  be 
  very 
  small 
  or 
  

   lacking) 
  and 
  a 
  foliaceous 
  ventral 
  cirrus. 
  Prostomium 
  somewhat 
  triangular, 
  

   widest 
  basally, 
  with 
  anterior 
  part 
  rounded, 
  with 
  2 
  pairs 
  short, 
  subulate, 
  

   frontal 
  antennae, 
  usually 
  with 
  2 
  deep-set 
  eyes 
  (may 
  not 
  be 
  visible 
  when 
  

   preserved), 
  usually 
  with 
  a 
  median 
  occipital 
  depression 
  containing 
  a 
  small 
  

   occipital 
  tubercle 
  (not 
  always 
  conspicuous), 
  with 
  a 
  pair 
  of 
  lateral 
  nuchal 
  

   grooves 
  Eteone 
  (p. 
  232) 
  

  

  