﻿286 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.108 
  

  

  Key 
  to 
  the 
  genera 
  of 
  Cirratulidae 
  from 
  Point 
  Barrow 
  

  

  1. 
  With 
  few 
  to 
  numerous, 
  grooved 
  tentacular 
  filaments 
  just 
  anterior 
  to 
  first 
  

   setigerous 
  segment, 
  subequal 
  to 
  branchiae 
  (without 
  2 
  palps; 
  fig. 
  33, 
  a). 
  

  

  Cirratulus 
  (p. 
  286) 
  

  

  With 
  2 
  large 
  grooved, 
  spioniform 
  palps 
  just 
  anterior 
  to 
  first 
  setigerous 
  segment 
  

  

  (without 
  tentacular 
  filaments; 
  palps 
  deciduous; 
  may 
  be 
  missing 
  in 
  epitoke; 
  

  

  fig. 
  33, 
  d) 
  Chaetozone 
  (p. 
  287) 
  

  

  Genus 
  Cirratulus 
  Laxuark, 
  1801 
  

   Cirratulus 
  cirratus 
  (Miiller, 
  1776) 
  

  

  Figure 
  33, 
  a-c 
  

  

  Lumbricus 
  cirratus 
  Miiller, 
  1776, 
  p. 
  215. 
  

  

  Cirratulus 
  cirratus 
  Malmgren, 
  1867, 
  p. 
  95. 
  — 
  Chamberlin, 
  1920, 
  p. 
  20. 
  — 
  Eliason, 
  

   1920, 
  p. 
  57.— 
  Fauvel, 
  1927, 
  p. 
  94, 
  fig. 
  33, 
  a-g; 
  1933, 
  p. 
  46; 
  1936, 
  p. 
  72.— 
  

   Augener, 
  1928, 
  p. 
  750, 
  pi. 
  11, 
  fig. 
  9.— 
  Monro, 
  1930, 
  p. 
  154; 
  1936, 
  p. 
  161.— 
  

   Annenkova, 
  1931, 
  p. 
  203; 
  1932, 
  p. 
  136; 
  1934, 
  p. 
  322; 
  1937, 
  p. 
  173; 
  1938, 
  p. 
  

   181.— 
  Berkeley 
  and 
  Berkeley, 
  1942, 
  p. 
  197; 
  1943, 
  p. 
  130; 
  1952, 
  p. 
  31, 
  figs. 
  

   58, 
  59.— 
  Hartman, 
  1944a, 
  pp. 
  334, 
  341; 
  1944b, 
  p. 
  263; 
  1948, 
  p. 
  37.— 
  Gorbunov, 
  

   1946, 
  p. 
  39.— 
  Zatsepin, 
  1948, 
  p. 
  133, 
  pi. 
  32, 
  fig. 
  18.— 
  Wesenberg-Lund, 
  

   1950a, 
  p. 
  33; 
  1950b, 
  p. 
  81; 
  1951, 
  p. 
  74.— 
  Hartman 
  and 
  Reish, 
  1950, 
  p. 
  34. 
  

  

  Cirratulus 
  robustus 
  Johnson, 
  1901, 
  p. 
  423, 
  pi. 
  14, 
  figs. 
  149, 
  150. 
  — 
  Rioja, 
  1941, 
  

   p. 
  728.— 
  Berkeley 
  and 
  Berkeley, 
  1942, 
  p. 
  197. 
  

  

  Cirratulus 
  cingulatus 
  Johnson, 
  1901, 
  p. 
  422, 
  pi. 
  14, 
  figs. 
  145-148. 
  — 
  Rioja, 
  1941, 
  

   p. 
  729. 
  

  

  Cirratulus 
  spectabilis 
  Berkeley 
  and 
  Berkeley, 
  1952, 
  p. 
  32. 
  

  

  Description. 
  — 
  Length 
  up 
  to 
  300 
  ^mm., 
  width 
  5 
  mm. 
  Prostomium 
  

   variable 
  in 
  shape: 
  Short, 
  broad, 
  bluntly 
  conical; 
  almost 
  square- 
  

   shaped; 
  or 
  tapered 
  gradually, 
  then 
  abruptly. 
  Prostomium 
  with 
  

   usually 
  four 
  or 
  five 
  (2-8) 
  eyes 
  on 
  each 
  side 
  in 
  obliquely 
  transverse 
  

   row 
  or 
  may 
  be 
  united 
  in 
  almost 
  solid 
  arc. 
  Buccal 
  segment 
  more 
  or 
  

   less 
  fused 
  with 
  prostomium, 
  two 
  following 
  achaetous 
  segments 
  more 
  

   or 
  less 
  distinct. 
  Tentacular 
  filaments 
  anterior 
  to 
  first 
  setigerous 
  

   segment, 
  in 
  two 
  groups 
  of 
  2-24 
  in 
  obliquely 
  transverse 
  rows, 
  long, 
  

   filamentous, 
  grooved 
  longitudinally. 
  Branchiae 
  begin 
  just 
  anterior 
  to 
  

   first 
  setigerous 
  segment, 
  lateral 
  to 
  group 
  of 
  tentacular 
  filaments, 
  

   continuing 
  through 
  greater 
  part 
  of 
  body, 
  anteriorly 
  inserted 
  close 
  to 
  

   upper 
  part 
  of 
  notopodia, 
  then 
  gradually 
  shifting 
  more 
  dorsally 
  and 
  

   then 
  sUghtly 
  more 
  ventrally. 
  Parapodia 
  consisting 
  of 
  slightly 
  pro- 
  

   jecting 
  tori 
  common 
  to 
  both 
  no 
  to- 
  and 
  neuropodia, 
  with 
  capillary 
  

   setae 
  in 
  both 
  lobes, 
  with 
  additional 
  acicular 
  crotchets 
  first 
  appearing 
  

   in 
  neuropodia 
  and 
  more 
  posteriorly 
  in 
  notopodia 
  also. 
  Anus 
  sub- 
  

   dorsal. 
  Color: 
  In 
  life: 
  Orange 
  yellow 
  with 
  red 
  branchiae; 
  dark 
  

   orange 
  brown 
  with 
  orange-red 
  branchiae. 
  In 
  alcohol: 
  Yellowish 
  

   brown 
  or 
  without 
  color. 
  

  

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

   Point 
  Barrow, 
  5-6.6 
  fms.; 
  off 
  Point 
  Barrow 
  base, 
  up 
  to 
  8 
  miles 
  from 
  

  

  