﻿MARINE 
  POLYCHAETE 
  WORMS 
  — 
  PETTIBONE 
  323 
  

  

  9.— 
  Berkeley 
  and 
  Berkeley, 
  1943, 
  p. 
  130; 
  1952, 
  p. 
  87, 
  figs. 
  177, 
  178.— 
  Gor- 
  

  

  bunov, 
  1946, 
  p. 
  39.— 
  Hartman, 
  1948, 
  p. 
  44. 
  

   Nicolea 
  simplex 
  Verrill, 
  1873, 
  p. 
  613; 
  1881, 
  p. 
  302, 
  pi. 
  10, 
  fig. 
  1.— 
  Sumner, 
  Osburn, 
  

  

  and 
  Cole, 
  1913, 
  p. 
  627. 
  

   Nicolea 
  venustula 
  Ehlers, 
  1913, 
  p. 
  559. 
  — 
  Hessle, 
  1917, 
  p. 
  171. 
  — 
  Chamberlin, 
  1920, 
  

  

  p. 
  22.— 
  Eliason, 
  1920, 
  p. 
  73.— 
  Fauvel, 
  1927, 
  p. 
  260, 
  fig. 
  90, 
  a-f 
  ; 
  1934a, 
  p. 
  68.— 
  

  

  Augener, 
  1928, 
  p. 
  788.— 
  Thorson, 
  1946, 
  p. 
  126.— 
  Zatsepin, 
  1948, 
  p. 
  156, 
  pi. 
  

  

  38, 
  fig. 
  11.— 
  Wesenberg-Lund, 
  1950a, 
  p. 
  51; 
  1950b, 
  p. 
  118; 
  1951, 
  p. 
  109. 
  

  

  Description. 
  — 
  Length 
  15-48 
  mm., 
  width 
  2-5 
  mm., 
  segments 
  30-46 
  

   (up 
  to 
  70 
  mm. 
  long 
  — 
  Wiren, 
  1883). 
  Ventral 
  shields 
  about 
  14. 
  

   Cephalic 
  ridge 
  with 
  numerous 
  dark 
  eye-spots. 
  Branchiae 
  two 
  pairs, 
  

   on 
  segments 
  2-3, 
  branched 
  dichotomously 
  3-6 
  times, 
  with 
  very 
  short 
  

   main 
  stem, 
  first 
  pair 
  much 
  larger 
  than 
  second. 
  Without 
  lateral 
  lobes 
  

   on 
  branchial 
  segments. 
  Nephridial 
  papillae 
  on 
  segments 
  3 
  (slightly 
  

   posterior 
  to 
  pair 
  of 
  second 
  branchiae), 
  6, 
  and 
  7; 
  small 
  in 
  female; 
  in 
  

   male, 
  papillae 
  on 
  segments 
  6 
  and 
  7 
  long, 
  cylindrical. 
  Thoracic 
  seti- 
  

   gers 
  15 
  (14-18, 
  according 
  to 
  Hessle). 
  Uncini 
  begin 
  on 
  segment 
  5 
  

   (setigerous 
  segment 
  2), 
  in 
  single 
  rows 
  on 
  first 
  six, 
  in 
  two 
  alternating 
  

   rows 
  on 
  rest 
  of 
  thoracic 
  segments, 
  in 
  single 
  rows 
  on 
  prominent 
  pro- 
  

   jecting 
  abdominal 
  pinnules. 
  Pygidium 
  crenulate. 
  Colorless 
  or 
  

   slightly 
  brownish 
  in 
  alcohol. 
  Females 
  with 
  large 
  yolky 
  eggs 
  inside 
  

   body 
  (Point 
  Barrow, 
  August 
  21, 
  and 
  September 
  15, 
  1948; 
  August 
  8, 
  

   1949). 
  Tube 
  with 
  tough, 
  translucent 
  membranous 
  lining, 
  with 
  small 
  

   pebbles 
  of 
  various 
  sizes, 
  shell 
  debris, 
  foraminiferans, 
  etc. 
  

  

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

   miles 
  from 
  shore, 
  13.3-123.5 
  fms., 
  on 
  bottoms 
  of 
  mud, 
  stones, 
  mass 
  of 
  

   worm 
  tubes, 
  and 
  various 
  combinations 
  of 
  mud, 
  sand, 
  gravel, 
  pebbles, 
  

   stones, 
  rocks, 
  large 
  perforated 
  rocks, 
  with 
  bryozoans, 
  hydroids, 
  shells 
  

   (24 
  stations, 
  79 
  specimens). 
  Alaska: 
  Security 
  Bay, 
  Jones. 
  Cana- 
  

   dian 
  Arctic: 
  Dobbin 
  Bay, 
  E. 
  Ellesmere 
  Island, 
  79°36' 
  N., 
  73°35' 
  

   W., 
  17 
  fms., 
  Littlewood, 
  1950. 
  East 
  Coast 
  North 
  America: 
  Off 
  

   Maine, 
  Massachusetts, 
  Rhode 
  Island, 
  Connecticut, 
  shore 
  to 
  63 
  

   fathoms 
  and 
  surface 
  (young), 
  U. 
  S. 
  Fish 
  Commission. 
  

  

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

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

   Josef 
  Land, 
  Novaya 
  Zemlya, 
  Kara 
  Sea. 
  Also 
  Iceland, 
  Faroes, 
  Nor- 
  

   way 
  to 
  France, 
  Mediterranean, 
  Adriatic, 
  Red 
  Sea; 
  Hudson 
  Bay 
  to 
  

   Connecticut; 
  Bering 
  Sea 
  to 
  western 
  Canada; 
  north 
  Japan 
  Sea; 
  South 
  

   Africa. 
  In 
  low 
  water 
  to 
  472 
  fathoms. 
  

  

  Grenus 
  Pista 
  Malmgren, 
  1865 
  

   Pista 
  maculata 
  (Dalyell, 
  1853) 
  

  

  Figure 
  36, 
  k, 
  I 
  

   Terebella 
  maculata 
  Dalyell, 
  1853, 
  p. 
  203, 
  pi. 
  28, 
  figs. 
  10-14, 
  19. 
  

   Scione 
  lobata 
  Malmgren, 
  1865, 
  p. 
  383, 
  pi. 
  23, 
  fig. 
  62.— 
  Verrill, 
  1881, 
  pp. 
  305, 
  310.— 
  

  

  Webster 
  and 
  Benedict, 
  1887, 
  p. 
  749. 
  — 
  Augener, 
  1928, 
  p. 
  789. 
  — 
  Friedrich, 
  

  

  1939, 
  p. 
  127. 
  

  

  