﻿232 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  2. 
  Antennae 
  4 
  (2 
  pairs 
  frontal 
  antennae). 
  Prostomium 
  cordiform, 
  with 
  an 
  

   occipital 
  tubercle 
  in 
  the 
  posterior 
  notch 
  (fig. 
  27, 
  d) 
  . 
  Proboscis 
  with 
  papillae 
  

   proximally 
  arranged 
  in 
  longitudinal 
  rows 
  Phyllodoce 
  (p. 
  236) 
  

  

  Antennae 
  5 
  (2 
  pairs 
  frontal 
  antennae 
  and 
  unpaired 
  median 
  antenna) 
  . 
  Prosto- 
  

   mium 
  oval 
  or 
  bluntly 
  conical, 
  without 
  occipital 
  tubercle 
  (fig. 
  27, 
  c). 
  Pro- 
  

   boscis 
  with 
  surface 
  smooth, 
  wrinkled, 
  or 
  with 
  few 
  scattered 
  papillae 
  

  

  Eumida 
  (p. 
  238) 
  

  

  Genus 
  My 
  slides 
  Theel, 
  1879 
  

   Mystides 
  borealis 
  Theel, 
  1879 
  

  

  Figure 
  27, 
  b 
  

  

  Mystides 
  borealis 
  Thdel, 
  1879, 
  p. 
  35, 
  pi. 
  2, 
  figs. 
  29-32.— 
  Southern, 
  1914, 
  p. 
  72, 
  

   pi. 
  8, 
  fig. 
  19, 
  A-D.— 
  Bergstrom, 
  1914, 
  p. 
  176, 
  fig. 
  64.— 
  Fauvel, 
  1923, 
  p. 
  181, 
  

   fig. 
  65, 
  a-d.— 
  Augener, 
  1928, 
  p. 
  711.— 
  Zatsepin, 
  1948, 
  p. 
  113, 
  pi. 
  29, 
  fig. 
  15.— 
  

   Wesenberg-Lund, 
  1950b, 
  p. 
  37. 
  

  

  Mystides 
  viridis 
  Webster 
  and 
  Benedict, 
  1887, 
  p. 
  712, 
  pi. 
  1, 
  figs. 
  10, 
  11, 
  13; 
  pi. 
  2, 
  

   fig. 
  12. 
  (Type 
  in 
  USNM.) 
  

  

  Mystides 
  notialis 
  Ehlers, 
  1913, 
  p. 
  457, 
  pi. 
  29, 
  figs. 
  1-4. 
  

  

  Description. 
  — 
  Length 
  5-9 
  mm., 
  width 
  0.5 
  mm. 
  Segments 
  33-64 
  

   (up 
  to 
  16 
  mm. 
  long 
  and 
  73 
  segments 
  — 
  Ehlers, 
  1913). 
  Body 
  small, 
  

   linear, 
  tapering 
  anteriorly 
  and 
  posteriorly, 
  flattened 
  dorsoventrally. 
  

   Prostomium 
  ova], 
  wider 
  than 
  long, 
  with 
  two 
  deeply-set 
  eyes 
  in 
  middle 
  

   of 
  prostomium, 
  with 
  four 
  long, 
  filiform 
  antennae 
  about 
  one-third 
  

   way 
  back 
  from 
  anterior 
  tip. 
  Tentacular 
  cirri 
  3 
  pairs, 
  enlarged 
  basally, 
  

   with 
  long, 
  filiform 
  tips. 
  Dorsal, 
  ventral, 
  and 
  anal 
  cirri 
  oval, 
  thick, 
  

   flattened. 
  Color: 
  In 
  alcohol: 
  Without 
  color 
  or 
  irregularly 
  pigmented 
  

   with 
  brown; 
  cirri 
  deep 
  reddish 
  brown. 
  

  

  Remarks. 
  — 
  The 
  description 
  of 
  M. 
  notialis 
  from 
  the 
  Antarctic 
  by 
  

   Ehlers 
  (1913) 
  follows 
  closely 
  that 
  of 
  M. 
  borealis 
  and 
  is 
  herein 
  considered 
  

   to 
  be 
  synonymous. 
  

  

  New 
  records. 
  — 
  ^Arctic 
  Alaska: 
  Off 
  Point 
  Barrow, 
  7.5 
  miles 
  from 
  

   shore, 
  36 
  fms., 
  on 
  bottom 
  of 
  stones, 
  perforated 
  rocks 
  (1 
  station, 
  2 
  

   specimens). 
  West 
  Coast 
  North 
  America: 
  Off 
  Flat 
  Point, 
  Lopez 
  

   Island, 
  Washington 
  Sound, 
  Pettibone 
  (1 
  specimen). 
  

  

  Distribution. 
  — 
  Scattered 
  records 
  in 
  the 
  Arctic: 
  Arctic 
  Alaska, 
  West 
  

   Greenland, 
  Spitsbergen, 
  Novaya 
  Zemlya. 
  Also 
  Ireland, 
  Madeira, 
  

   Mediterranean; 
  east 
  coast 
  North 
  America 
  (Maine); 
  west 
  coast 
  North 
  

   America 
  (Washington 
  Sound); 
  Antarctic 
  (Kerguelen). 
  In 
  4-214 
  

   fathoms. 
  

  

  Genus 
  Eteone 
  Savigny, 
  1817 
  

  

  The 
  four 
  species 
  represented 
  have 
  the 
  body 
  elongate, 
  somewhat 
  

   flattened 
  dorsoventrall}^, 
  tapering 
  anteriorly 
  and 
  posteriorly, 
  with 
  

   segments 
  numerous 
  (100-300). 
  Proboscis 
  with 
  a 
  circle 
  of 
  soft 
  papillae 
  

   around 
  opening. 
  

  

  