﻿214 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol,, 
  los 
  

  

  Key 
  to 
  the 
  genera 
  of 
  Polynoidae 
  from 
  Point 
  Barrow 
  

  

  1. 
  Notosetae 
  stouter 
  than 
  or 
  at 
  least 
  as 
  stout 
  as 
  neurosetae, 
  with 
  tips 
  blunt 
  to 
  

  

  pointed, 
  not 
  capillary 
  2 
  

  

  Notosetae 
  not 
  as 
  stout 
  as 
  neurosetae 
  5 
  

  

  2. 
  Notosetae 
  large, 
  smooth 
  or 
  with 
  only 
  faint 
  transverse 
  striations, 
  few 
  in 
  number 
  

  

  (5-9) 
  Melaenis 
  (p. 
  214) 
  

  

  Notosetae 
  with 
  transverse 
  spinous 
  rows, 
  more 
  numerous 
  (more 
  than 
  10) 
  3 
  

  

  3. 
  Neurosetae 
  long, 
  slender, 
  at 
  least 
  some 
  end 
  in 
  capillary 
  tips.Antinoe 
  (p. 
  215) 
  

   Neurosetae 
  stouter, 
  with 
  tips 
  straight 
  or 
  slightly 
  hooked, 
  not 
  capillary 
  4 
  

  

  4. 
  All 
  neurosetae 
  with 
  entire 
  bare 
  tips 
  Eunoe 
  (p. 
  216) 
  

  

  Some 
  of 
  neurosetae 
  bidentate, 
  with 
  secondary 
  tooth 
  well 
  developed 
  or 
  rudi- 
  

   mentary 
  (fig. 
  26, 
  e) 
  Harmothoe 
  (p. 
  220) 
  

  

  5. 
  Some 
  notosetae 
  with 
  capillary 
  tips. 
  Segments 
  less 
  than 
  40 
  (35-38), 
  thus, 
  

  

  posterior 
  end 
  of 
  body 
  covered 
  with 
  elytra 
  6 
  

  

  None 
  of 
  notosetae 
  with 
  capillary 
  tips. 
  Segments 
  more 
  than 
  40 
  (45-65), 
  thus, 
  

   a 
  rather 
  long 
  posterior 
  end 
  without 
  elytra. 
  Elytra 
  smooth, 
  without 
  

   tubercles 
  Enipo 
  (p. 
  225) 
  

  

  6. 
  Neurosetae 
  of 
  2 
  kinds, 
  upper 
  few 
  end 
  in 
  slender 
  tips, 
  rest 
  end 
  in 
  bifid 
  tips. 
  

  

  Elytra 
  smooth 
  except 
  for 
  few 
  microtubercles 
  on 
  anterior 
  curved 
  part. 
  

  

  Arcteobia 
  (p. 
  225) 
  

  

  Neurosetae 
  all 
  similar, 
  with 
  entire 
  tips. 
  Elytra 
  with 
  microtubercles 
  and 
  

  

  sometimes 
  also 
  with 
  macrotubercles 
  Gattyana 
  (p. 
  622) 
  

  

  Genus 
  Melaenis 
  Malmgren, 
  1865 
  

   Melaenis 
  loveni 
  Malmgren, 
  1865 
  

  

  Melaenis 
  lovini 
  Malmgren, 
  1865, 
  p. 
  78, 
  pi. 
  10, 
  fig. 
  10.— 
  Th^el, 
  1879, 
  p. 
  22.— 
  

   Wir^n, 
  1883, 
  p. 
  391, 
  pi. 
  28, 
  fig. 
  4; 
  pi. 
  29, 
  fig. 
  3.— 
  Murdoch, 
  1885, 
  p. 
  152.— 
  

   Moore, 
  1908, 
  p. 
  337.— 
  Fauvel, 
  1914, 
  p. 
  49.— 
  Augener, 
  1928, 
  p. 
  695.— 
  

   Ditlevsen, 
  1937, 
  p. 
  16.— 
  Gorbunov, 
  1946, 
  p. 
  38.— 
  Wesenberg-Lund, 
  1950a, 
  

   p. 
  9; 
  1950b, 
  p. 
  29. 
  

  

  Melaenis 
  lov6ni 
  var, 
  gigantea 
  Wir4n, 
  1883, 
  p. 
  391, 
  pi. 
  28, 
  fig. 
  3; 
  pi. 
  29, 
  fig. 
  4. 
  — 
  

   Murdoch, 
  1885, 
  p. 
  153. 
  

  

  Description. 
  — 
  ^Ijength 
  25-76 
  mm., 
  width 
  including 
  setae 
  9-22 
  mm- 
  

   (up 
  to 
  110 
  mm. 
  long 
  — 
  Ditlevsen, 
  1937). 
  Segments 
  39-41. 
  Body 
  

   elongated, 
  thick, 
  tapering 
  both 
  anteriorly 
  and 
  posteriorly. 
  Pro- 
  

   stomium 
  without 
  cephalic 
  peaks, 
  antennae 
  smooth. 
  Dorsal 
  cirri 
  

   with 
  fine, 
  scattered, 
  clavate 
  papillae. 
  Elytra 
  smooth, 
  soft, 
  trans- 
  

   lucent 
  to 
  opaque, 
  not 
  covering 
  middorsum 
  and 
  posterior 
  few 
  segments. 
  

   Notosetae 
  much 
  stouter 
  than 
  neurosetae, 
  few 
  in 
  number 
  (5-9), 
  

   light 
  to 
  dark 
  amber-colored, 
  smooth 
  or 
  with 
  only 
  very 
  faint 
  transverse 
  

   striations. 
  Neurosetae 
  of 
  two 
  kinds: 
  Numerous, 
  long, 
  slender, 
  

   finely 
  denticled, 
  with 
  capillary 
  tips; 
  few, 
  shorter, 
  with 
  subequal, 
  

   diverging, 
  forked, 
  blunt 
  tips 
  (one 
  part 
  of 
  fork 
  may 
  be 
  longer 
  than 
  the 
  

   other). 
  Color: 
  In 
  life 
  and 
  in 
  alcohol: 
  Wide 
  greenish 
  brown 
  to 
  

   bluish 
  gray 
  transverse 
  stripes 
  middorsally, 
  green 
  and 
  white 
  striped 
  on 
  

   dorsal 
  tubercles, 
  cirrophores 
  and 
  elytrophores; 
  without 
  color 
  ventrally; 
  

   elytra 
  light 
  to 
  dark 
  greenish 
  in 
  a 
  wide, 
  circular 
  band, 
  a 
  circular 
  area 
  

  

  