﻿264 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  heterogomph 
  spinigers 
  (fig. 
  30, 
  /) 
  and 
  heterogomph 
  falcigers 
  with 
  

   hooked 
  end-pieces 
  (fig. 
  30, 
  d). 
  Proboscis 
  with 
  paragnaths 
  all 
  

   chitinous, 
  conical, 
  separated 
  in 
  groups, 
  occurring 
  on 
  both 
  rings 
  

   (fig. 
  30, 
  h, 
  i). 
  Distal 
  ring 
  of 
  paragnaths: 
  Area 
  II 
  (dorsolateral) 
  — 
  

   oblique 
  group 
  of 
  two 
  or 
  three 
  rows; 
  area 
  III 
  (medio 
  ventral) 
  — 
  small 
  

   transverse 
  group; 
  area 
  IV 
  (ventrolateral)— 
  arched 
  mass. 
  Basal 
  ring 
  

   of 
  paragnaths: 
  Area 
  V 
  (mediodorsal) 
  — 
  0. 
  At 
  maturity, 
  with 
  epito- 
  

   kous 
  stage, 
  eyes 
  enlarged; 
  14-19 
  anterior 
  prenatatory 
  setigers; 
  

   modified 
  natatory 
  setigers 
  with 
  parapodial 
  lobes 
  compressed, 
  flat- 
  

   tened 
  anteroposteriorly, 
  developing 
  foliaceous 
  lamellar 
  plates, 
  with 
  

   numerous 
  paddlelike 
  swimming 
  setae; 
  in 
  males, 
  first 
  seven 
  dorsal 
  

   cirri 
  enlarged 
  and 
  club-shaped, 
  first 
  five 
  or 
  six 
  ventral 
  cirri 
  modified, 
  

   and 
  dorsal 
  cirri 
  of 
  natatory 
  setigers 
  crenulate 
  on 
  lower 
  margin; 
  in 
  

   females, 
  dorsal 
  and 
  ventral 
  cutI 
  not 
  modified 
  or 
  crenulate. 
  

  

  Key 
  to 
  the 
  species 
  of 
  Nereis 
  (Nereis) 
  from 
  Point 
  Barrow 
  

  

  1. 
  Parapodial 
  ligules 
  short, 
  thick, 
  evenly 
  rounded 
  (fig. 
  30, 
  b). 
  Body 
  uniformly 
  

   purplish 
  or 
  reddish 
  brown, 
  not 
  banded. 
  Paragnaths 
  of 
  distal 
  ring: 
  Area 
  

   I 
  (mediodorsal) 
  — 
  2 
  in 
  tandem 
  (rarely 
  1 
  or 
  3); 
  paragnaths 
  of 
  basal 
  ring: 
  

   Area 
  VI 
  (dorsolateral) 
  — 
  4 
  in 
  square 
  or 
  cross 
  (rarely 
  3 
  or 
  5); 
  areas 
  VII- 
  

   VIII 
  (ventral) 
  — 
  1-2 
  irregular 
  rows 
  of 
  larger 
  paragnaths, 
  vnth. 
  several 
  rows 
  

   of 
  small 
  ones, 
  diminishing 
  in 
  size 
  posteriorly 
  (2-3 
  irregular 
  rows 
  of 
  subequal 
  

   paragnaths 
  in 
  subspecies 
  occidentalis). 
  Male 
  epitokes 
  with 
  16 
  and 
  females 
  

  

  with 
  17-19 
  prenatatory 
  setigers 
  N. 
  (N.) 
  pelagica 
  

  

  Parapodial 
  ligules 
  triangular 
  to 
  conical, 
  gradually 
  tapering 
  to 
  a 
  broad 
  tip 
  

   (fig. 
  30, 
  c). 
  Body 
  transversely 
  banded 
  reddish 
  brown 
  or 
  violet. 
  Parag- 
  

   naths 
  of 
  distal 
  ring: 
  Area 
  I 
  — 
  or 
  1; 
  paragnaths 
  of 
  basal 
  ring: 
  Area 
  VI 
  — 
  

   6-10 
  or 
  more 
  in 
  oval 
  mass; 
  VII-VIII 
  — 
  continuous 
  row 
  of 
  larger 
  parag- 
  

   naths 
  followed 
  by 
  a 
  wide 
  band 
  of 
  small 
  subequal 
  ones 
  (fig. 
  30, 
  hy 
  i). 
  Mais 
  

   epitokes 
  with 
  14 
  and 
  females 
  with 
  16 
  prenatatory 
  setigers 
  N. 
  (N.) 
  zonata 
  

  

  Nereis 
  {Nereis) 
  pelagica 
  Linne 
  1758 
  

  

  Figure 
  30, 
  a, 
  b 
  

  

  Nereis 
  pelagica 
  Linn6, 
  1758, 
  p. 
  654. 
  — 
  Malmgren, 
  1867, 
  p. 
  47, 
  pi. 
  5, 
  fig. 
  35. 
  — 
  

   Webster 
  and 
  Benedict, 
  1884, 
  p. 
  718; 
  1887, 
  p. 
  724.— 
  Moore, 
  1903, 
  p. 
  431.— 
  

   Mcintosh, 
  1908, 
  p. 
  268, 
  figs.— 
  Sumnsr, 
  1913, 
  p. 
  619.— 
  Southern, 
  1914, 
  p. 
  

   80.— 
  Eliason, 
  1920, 
  p. 
  29.— 
  Chamberlin, 
  1920, 
  p. 
  14.— 
  Fauvel, 
  1923, 
  p. 
  336, 
  

   fig. 
  130, 
  a-f.— 
  Augener, 
  1928, 
  p. 
  712.— 
  Monro, 
  1930, 
  p. 
  106.— 
  Annenkova, 
  

   1934, 
  p. 
  322; 
  1937, 
  p. 
  162; 
  1938, 
  p. 
  158.— 
  Treadwell, 
  1937, 
  p. 
  29.— 
  Okuda, 
  

   1939, 
  p. 
  230.— 
  Friedrich, 
  1939, 
  p. 
  123.— 
  Hartman, 
  1940, 
  p. 
  225, 
  pi. 
  35, 
  fig. 
  

   52; 
  1944a, 
  p. 
  335; 
  1948, 
  p. 
  26.— 
  Berkeley 
  and 
  Berkeley, 
  1943, 
  p. 
  130; 
  1948, 
  

   p. 
  66, 
  fig. 
  96, 
  a-b.— 
  Thorson, 
  1946, 
  p. 
  64, 
  fig. 
  29.— 
  Zatsepin, 
  1948, 
  p. 
  119, 
  

   pi. 
  30, 
  fig. 
  2.— 
  Wesenberg-Lund, 
  1950a, 
  p. 
  19, 
  pi. 
  6, 
  figs. 
  26a, 
  27a; 
  1950b, 
  

   p. 
  53; 
  1951, 
  p. 
  39. 
  

  

  Heteronereis 
  grandifoUa 
  Rathke, 
  1843, 
  p. 
  155, 
  pi. 
  7, 
  figs. 
  13, 
  14. 
  — 
  Malmgren, 
  

   1865, 
  p. 
  108, 
  pi. 
  11, 
  fig. 
  15 
  (part 
  — 
  female 
  heteronereid, 
  not 
  male). 
  

  

  Nereis 
  neonigripes 
  Hartman, 
  1936b, 
  p. 
  471, 
  fig. 
  48. 
  

  

  Nereis 
  arctica 
  Treadwell, 
  1937, 
  p. 
  30. 
  

  

  Nereis 
  pelagica 
  var. 
  occidentalis 
  Hartman, 
  1945, 
  p. 
  20, 
  pi. 
  4, 
  figs. 
  1-6; 
  1951, 
  p. 
  46. 
  

  

  Nereis 
  pelagica 
  neonigripes 
  Hartman 
  and 
  Reish, 
  1950, 
  p. 
  17. 
  

  

  