﻿276 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  m 
  

  

  on 
  setigers 
  15-24 
  (22-35 
  or 
  more) 
  ; 
  on 
  young 
  specimens, 
  the 
  hooded, 
  

   hooked 
  setae 
  may 
  begin 
  on 
  more 
  anterior 
  segments; 
  acicula 
  black. 
  

   With 
  two 
  anal 
  cu'ri 
  on 
  ventral 
  side 
  of 
  short, 
  disclike 
  pygidium. 
  Jaw 
  

   formula 
  of 
  proboscis 
  (numbers 
  refer 
  to 
  number 
  of 
  teeth) 
  : 
  M 
  II, 
  4+4 
  

   (sometimes 
  5?); 
  M 
  III, 
  1 
  + 
  1 
  (or 
  2 
  + 
  1); 
  M 
  IV, 
  1 
  + 
  1. 
  Color: 
  In 
  hfe: 
  

   Reddish 
  orange, 
  iridescent. 
  In 
  alcohol: 
  Colorless 
  to 
  gray, 
  iridescent; 
  

   young 
  specimens 
  uniformly 
  reddish 
  brown 
  or 
  somewhat 
  banded 
  with 
  

   one 
  wide 
  dark 
  brown 
  band 
  per 
  segment. 
  

  

  Remarks. 
  — 
  Three 
  small 
  specimens 
  (0.8 
  mm. 
  wide 
  without 
  setae) 
  

   have 
  the 
  hooded, 
  hooked 
  setae 
  beginning 
  on 
  the 
  first 
  one 
  to 
  three 
  

   setigers 
  as 
  in 
  L. 
  minuta 
  Theel. 
  They 
  are 
  considered 
  to 
  be 
  the 
  young 
  

   of 
  L. 
  jragilis 
  as 
  has 
  been 
  suggested 
  earlier 
  by 
  Levinsen 
  (1882) 
  and 
  

   Eliason 
  (1920). 
  

  

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

   miles 
  from 
  shore, 
  20-123.5 
  fms., 
  on 
  bottoms 
  of 
  mud, 
  stones, 
  worm 
  tubes 
  

   and 
  various 
  combinations 
  of 
  mud, 
  sand, 
  gravel, 
  stones, 
  rocks, 
  shells 
  

   (16 
  stations, 
  29 
  specimens). 
  East 
  Greenland: 
  Off 
  Cape 
  Hold 
  with 
  

   Hope, 
  23-40 
  fms., 
  Bartlett, 
  1939. 
  Eastern 
  North 
  America: 
  Off 
  

   Labrador, 
  5-13 
  fms.. 
  Blue 
  Dolphin 
  Expeditions, 
  1949, 
  1950; 
  off 
  Nova 
  

   Scotia, 
  Bay 
  of 
  Fundy, 
  Maine, 
  Massachusetts, 
  Rhode 
  Island, 
  7-452 
  

   fms., 
  U. 
  S. 
  Fish 
  Commission; 
  Woods 
  Hole 
  region, 
  low 
  water 
  and 
  

   dredged, 
  Pettibone, 
  1950, 
  1951. 
  Alaska: 
  Chiachi 
  Islands, 
  20 
  fms., 
  

   mud, 
  Dall, 
  1874. 
  

  

  Distrih'ution. 
  — 
  Widely 
  distributed 
  in 
  the 
  Arctic: 
  Siberian 
  and 
  Alas- 
  

   kan 
  Arctic, 
  Davis 
  Strait, 
  Greenland, 
  Jan 
  Mayen, 
  Spitsbergen, 
  Franz 
  

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

   Faroes, 
  Norway 
  to 
  Azores, 
  Madeira, 
  Mediterranean; 
  Hudson 
  Bay 
  to 
  

   Rhode 
  Island; 
  Bering 
  Sea; 
  north 
  Japan 
  Sea. 
  In 
  low 
  water 
  to 
  1,883 
  

   fathoms. 
  

  

  ? 
  Larval 
  Lumbrineris 
  fragilis 
  (O. 
  F. 
  Miiller) 
  

  

  On 
  two 
  occasions 
  nonpelagic 
  larval 
  polychaetes 
  were 
  found 
  in 
  a 
  

   mucous 
  mass 
  off 
  Point 
  Barrow 
  base: 
  September 
  9, 
  1948, 
  21 
  fathoms, 
  

   from 
  breaking 
  rock 
  (the 
  larvae 
  described 
  as 
  rose-red); 
  September 
  6, 
  

   1949, 
  36 
  fathoms, 
  attached 
  to 
  tunicate 
  Boltenia 
  echinata. 
  Prostomium 
  

  

  Figure 
  31. 
  — 
  Glyceridae: 
  a, 
  Glycera 
  capiiata, 
  dorsal 
  view 
  prostomium; 
  b, 
  same, 
  parapodium 
  

   from 
  anterior 
  region, 
  posterior 
  view; 
  c, 
  same, 
  parapodium 
  from 
  middle 
  region, 
  anterior 
  

   view; 
  d, 
  same, 
  one 
  of 
  jaws. 
  Goniadidae: 
  e, 
  Glycinde 
  tvireni, 
  dorsal 
  view 
  anterior 
  end; 
  

   /, 
  same, 
  uniramous 
  parapodium 
  from 
  anterior 
  region, 
  anterior 
  view; 
  g, 
  same, 
  biramous 
  

   parapodium 
  from 
  posterior 
  region, 
  anterior 
  view. 
  Lumbrineridae: 
  A, 
  Lumbrineris 
  

   fragilis, 
  dorsal 
  view 
  anterior 
  end; 
  i, 
  same, 
  maxillary 
  plates 
  of 
  jaw 
  apparatus 
  (one 
  of 
  each 
  

   pair 
  shown); 
  j, 
  same, 
  mandibles 
  of 
  jaw 
  apparatus; 
  k, 
  same, 
  parapodium 
  from 
  anterior 
  

   region, 
  posterior 
  view; 
  /, 
  same, 
  parapodium 
  from 
  posterior 
  region, 
  posterior 
  view; 
  m, 
  

   same, 
  limbate 
  seta 
  with 
  capillary 
  tips; 
  n, 
  same, 
  simple 
  hooded 
  hooked 
  seta 
  (crotchet). 
  

   (For 
  explanation 
  of 
  symbols 
  see 
  p. 
  210.) 
  

  

  