﻿MARINE 
  POLYCHAETE 
  WORMS 
  — 
  PETTIBONE 
  221 
  

  

  Polynoe 
  imbricata 
  Marenzeller, 
  1879, 
  p. 
  9, 
  pi. 
  2, 
  fig. 
  1. 
  — 
  Th6el, 
  1879, 
  p. 
  9. 
  — 
  Hansen, 
  

  

  1882, 
  pp. 
  11, 
  13, 
  15, 
  23.— 
  Wiren, 
  1883, 
  p. 
  389. 
  

   Harmothoe 
  levis 
  Treadwell, 
  1937, 
  p. 
  26, 
  figs. 
  1-5. 
  

  

  Description. 
  — 
  Length 
  24-53 
  mm., 
  width 
  includmg 
  setae 
  8-19 
  mm. 
  

   (length 
  up 
  to 
  65 
  mm. 
  — 
  Theel, 
  1879). 
  Segments 
  37-39. 
  Prostomium 
  

   with 
  anterior 
  pair 
  eyes 
  ventral, 
  slightly 
  posterior 
  and 
  lateral 
  to 
  

   cephalic 
  peaks. 
  Elytra 
  with 
  scattered 
  conical 
  microtubercles, 
  with 
  

   or 
  without 
  few 
  to 
  numerous, 
  small, 
  brownish 
  to 
  reddish, 
  globular 
  to 
  

   elongate 
  cylindrical 
  macrotubercles 
  in 
  one, 
  two, 
  or 
  several 
  irregular 
  

   rows 
  near 
  posterior 
  border; 
  may 
  be 
  a 
  few 
  additional 
  globular 
  papillae 
  

   in 
  middle 
  of 
  elj^'tra; 
  with 
  or 
  without 
  short 
  elytral 
  fringe 
  of 
  papillae. 
  

   Neurosetae 
  with 
  long 
  spinous 
  regions, 
  with 
  long, 
  bare, 
  hooked 
  tips, 
  

   and 
  usually 
  with 
  a 
  subterminal 
  tooth 
  (may 
  be 
  broken 
  off). 
  Color: 
  

   In 
  life 
  and 
  in 
  alcohol: 
  Irregularly 
  pigmented 
  middorsally, 
  on 
  cirro- 
  

   phores, 
  dorsal 
  tubercles, 
  and 
  parapodial 
  lobes; 
  usually 
  without 
  color 
  

   ventrally; 
  elytra 
  show 
  remarkable 
  color 
  variations 
  of 
  mottled 
  tan 
  and 
  

   brown, 
  blackish 
  to 
  grayish, 
  or 
  reddish; 
  inner 
  halves 
  of 
  elytra 
  red 
  or 
  

   graj'^ish 
  brown 
  resulting 
  in 
  a 
  middorsal, 
  longitudinal, 
  pigmented 
  band 
  ; 
  

   uniformly 
  tan; 
  tan 
  with 
  bilateral 
  darker 
  spots 
  near 
  places 
  of 
  attach- 
  

   ment 
  (the 
  color 
  variet}^ 
  of 
  H. 
  levis 
  Treadwell) 
  . 
  

  

  Remarks. 
  — 
  Examination 
  of 
  the 
  types 
  of 
  H. 
  levis 
  Treadwell 
  from. 
  

   Greenland 
  waters 
  revealed 
  it 
  to 
  be 
  but 
  a 
  color 
  variation 
  of 
  H. 
  

   imbricata. 
  

  

  Parasites. 
  — 
  Of 
  the 
  215 
  specimens, 
  13 
  had 
  parasitic 
  copepods, 
  

   Herpyllobius 
  arcticus 
  Steenstrup 
  and 
  Liitken, 
  attached 
  on 
  the 
  pro- 
  

   stomium 
  (identified 
  by 
  Paul 
  L. 
  Illg). 
  

  

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

   Point 
  Barrow, 
  6.6 
  fms., 
  gravel, 
  stones, 
  mud; 
  Point 
  Barrow 
  base, 
  

   washed 
  ashore; 
  off 
  Point 
  Barrow 
  base, 
  up 
  to 
  16 
  miles 
  from 
  shore, 
  

   11.7-123.5 
  fms., 
  on 
  bottoms 
  of 
  stones, 
  mud, 
  masses 
  of 
  worm 
  tubes, 
  

   and 
  various 
  combinations 
  of 
  mud, 
  pebbles, 
  gravel, 
  stones, 
  large 
  

   perforated 
  rocks, 
  with 
  barnacles, 
  bryozoans, 
  hydroids, 
  tunicates, 
  

   shells, 
  worm 
  tubes 
  (34 
  stations, 
  215 
  specimens). 
  Canadian 
  Artic: 
  

   Southeast 
  corner 
  Foxe 
  Basin, 
  66°46' 
  N., 
  79°15' 
  W., 
  34-37 
  fms., 
  1927; 
  

   shoal 
  in 
  Kneeland 
  Bay, 
  Frobisher 
  Bay, 
  Baffin 
  Island, 
  7-12 
  fms., 
  

   1942; 
  west 
  shore 
  Frobisher 
  Bay, 
  1942; 
  off 
  Daniels 
  Island, 
  northwest 
  

   side 
  in 
  Newell 
  Sound, 
  Frobisher 
  Bay, 
  10-30 
  fms., 
  1942; 
  all 
  collected 
  

   by 
  Bartlett. 
  West 
  Greenland: 
  Oelricks 
  Bay, 
  mud, 
  1937; 
  Vaigat, 
  

   Disko 
  Island, 
  mud, 
  1937; 
  between 
  Capes 
  Alexander 
  and 
  Chalon, 
  

   25-40 
  fms., 
  rocks, 
  1937; 
  Walrus 
  grounds, 
  Murchison 
  Sound, 
  45-60 
  

   fms., 
  1938; 
  off 
  Conical 
  Rock, 
  76° 
  N., 
  67°30' 
  W., 
  20-40 
  fms., 
  rocks, 
  

   shell, 
  1938; 
  all 
  collected 
  by 
  Bartlett. 
  Upernivik 
  Harbor, 
  13 
  fms., 
  

   U.S.S. 
  Alert, 
  1884. 
  East 
  Greenland: 
  Clavering 
  Fiord, 
  1939; 
  

   Angmogssalik, 
  10-15 
  fms., 
  1939; 
  off 
  Cape 
  Hold 
  with 
  Hope, 
  23-40 
  

   fms., 
  1939; 
  all 
  collected 
  by 
  Bartlett. 
  Spitsbergen: 
  Spitsbergen 
  Sea, 
  

  

  