﻿328 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.108 
  

  

  N., 
  56° 
  W., 
  90 
  fms., 
  Greely 
  Relief 
  Expedition, 
  1884. 
  One 
  mile 
  

   northwest 
  Conical 
  Rock, 
  25-60 
  fms., 
  and 
  north 
  shore 
  Wolstenholm, 
  

   13-25 
  fms., 
  Bartlett, 
  1940. 
  East 
  Greenland: 
  Off 
  Cape 
  Hold 
  with 
  

   Hope, 
  23-40 
  fms., 
  Bartlett, 
  1939. 
  East 
  Coast 
  North 
  America: 
  

   Off 
  Labrador, 
  12-30 
  fms.. 
  Blue 
  Dolphin 
  Expedition, 
  1949; 
  off 
  New 
  

   Brunswick, 
  Nova 
  Scotia, 
  Maine, 
  New 
  Hampshire, 
  Massachusetts, 
  16- 
  

   640 
  fms., 
  U. 
  S. 
  Fish 
  Commission. 
  West 
  Coast 
  North 
  America: 
  

   Washington 
  and 
  Puget 
  Sounds, 
  low 
  water 
  to 
  46 
  fms., 
  mud, 
  shell, 
  rock, 
  

   Pettibone. 
  

  

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

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

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

   Shetlands, 
  Norway 
  to 
  Portugal, 
  Azores, 
  Madeira, 
  Mediterranean, 
  

   Adriatic; 
  Labrador 
  to 
  Massachusetts; 
  Bering 
  Sea 
  to 
  Washington; 
  

   Japan; 
  Indian 
  Ocean 
  (Andamans). 
  Southern 
  latitudes: 
  South 
  Geor- 
  

   gia, 
  South 
  Orkneys, 
  South 
  Shetlands, 
  Graham 
  Coast, 
  Palmer 
  

   Peninsula. 
  In 
  low 
  water 
  to 
  1,391 
  fathoms. 
  

  

  Genus 
  Polycirrus 
  Grube, 
  1851 
  

   Polycirrus 
  medusa 
  Grube, 
  1855 
  

  

  Figure 
  37, 
  e, 
  f 
  

  

  Polycirrus 
  medusa 
  Grube, 
  1855, 
  p. 
  120. 
  — 
  Hessle, 
  1917, 
  p. 
  220. 
  — 
  Fauvel, 
  1927, 
  p. 
  

   279, 
  fig. 
  97, 
  a-d.— 
  Augener, 
  1928, 
  p. 
  795.— 
  Annenkova, 
  1934, 
  p. 
  322; 
  1937, 
  

   p. 
  194; 
  1938, 
  p. 
  210.— 
  Gorbunov, 
  1946, 
  p. 
  39.— 
  Zatsepin, 
  1948, 
  p. 
  154, 
  pi. 
  38, 
  

   fig. 
  5.— 
  Wesenberg-Lund, 
  1950a, 
  p. 
  54; 
  1950b, 
  p. 
  123; 
  1951, 
  p. 
  114. 
  

  

  Ereutho 
  smitti 
  Malmgren, 
  1865, 
  p. 
  391, 
  pi. 
  23, 
  fig. 
  63. 
  — 
  Webster 
  and 
  Benedict, 
  

   1887, 
  p. 
  749. 
  

  

  Polycirrus 
  sp., 
  Hartman, 
  1948, 
  p. 
  45. 
  

  

  Description. 
  — 
  Length 
  up 
  to 
  70 
  mm., 
  width 
  6 
  mm. 
  Integument 
  

   tesselated. 
  Large 
  unpaired 
  ventral 
  shield 
  on 
  first 
  few 
  segments, 
  

   followed 
  by 
  about 
  six 
  pairs 
  of 
  ventral 
  shields 
  separated 
  in 
  midline. 
  

   Prostomium 
  and 
  buccal 
  segment 
  forming 
  lower 
  lip, 
  wide 
  semicircular 
  

   dorsal 
  cephalic 
  ridge 
  (without 
  eye-spots) 
  , 
  large 
  trilobed 
  or 
  undulating 
  

   tentacular 
  membrane 
  with 
  very 
  numerous 
  tentacles 
  on 
  its 
  outer 
  edge, 
  

   the 
  inner 
  part 
  forming 
  folded 
  upper 
  lip; 
  some 
  tentacles 
  long, 
  slender, 
  

   filiform, 
  others 
  thicker, 
  distinctly 
  grooved. 
  Thoracic 
  setigers 
  usually 
  

   13 
  (10-13), 
  beginning 
  on 
  segment 
  3 
  (or 
  2). 
  Without 
  thoracic 
  uncini; 
  

   uncini 
  begin 
  on 
  segment 
  16 
  (or 
  15 
  or 
  just 
  posterior 
  to 
  last 
  setiger), 
  

   uniserial, 
  few 
  in 
  number, 
  very 
  small 
  and 
  inconspicuous, 
  on 
  slightly 
  

   raised 
  abdominal 
  pinnules. 
  Six 
  pairs 
  nephridial 
  papillae 
  on 
  segments 
  

   3-8. 
  Females 
  with 
  large, 
  yolky 
  eggs 
  (Point 
  Barrow, 
  September 
  15, 
  

   1948, 
  and 
  October 
  14, 
  1949). 
  Color: 
  In 
  life: 
  Red. 
  In 
  alcohol: 
  

   Colorless. 
  Tube 
  : 
  Simple 
  galleries 
  in 
  mud 
  or 
  sand. 
  

  

  New 
  records. 
  — 
  Arctic 
  Alaska: 
  Off 
  Point 
  Barrow 
  base, 
  up 
  to 
  15 
  

   miles 
  from 
  shore, 
  13.3-78.2 
  fms., 
  on 
  bottoms 
  of 
  mud 
  and 
  various 
  com- 
  

  

  