﻿292 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  voi-.ios 
  

  

  Scotia, 
  Maine, 
  Massachusetts, 
  Rhode 
  Island, 
  6-499 
  fms., 
  U. 
  S. 
  Fish 
  

   Commission. 
  

  

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

   and 
  Canadian 
  Arctic, 
  Greenland, 
  Spitsbergen, 
  Barents 
  Sea, 
  Novaya 
  

   Zemlya, 
  Kara 
  Sea. 
  Also 
  Iceland, 
  Faroes, 
  Norway 
  to 
  Spain, 
  Mediter- 
  

   ranean, 
  Adriatic, 
  south 
  Arabian 
  Coast; 
  Hudson 
  Bay 
  to 
  Rhode 
  Island; 
  

   Bering 
  Sea 
  to 
  southern 
  California; 
  north 
  Japan 
  Sea 
  to 
  Japan; 
  South 
  

   Atlantic: 
  South 
  Orkney 
  and 
  South 
  Shetland 
  Islands. 
  In 
  low 
  water 
  

   to 
  853 
  fathoms. 
  

  

  Brada 
  inhabilis 
  (Rathke, 
  1843) 
  

  

  FiGUEE 
  33, 
  h 
  

  

  Siphonostoma 
  inhahile 
  Rathke, 
  1843, 
  p. 
  218, 
  pi. 
  11, 
  fig. 
  13. 
  

  

  Brada 
  sublaevis 
  Stimpson, 
  1854, 
  p. 
  32.— 
  Verrill, 
  1881, 
  pp. 
  289, 
  304.— 
  Webster 
  

   and 
  Benedict, 
  1887, 
  p. 
  731. 
  

  

  Brada 
  granulata 
  Malmgren, 
  1867, 
  p. 
  85, 
  pi. 
  12, 
  fig. 
  71.— 
  Th^el, 
  1879, 
  p. 
  52.— 
  

   not 
  Murdoch, 
  1885, 
  p. 
  155 
  ( 
  = 
  S. 
  villosa). 
  — 
  Annenkova, 
  1937, 
  p. 
  176; 
  1938, 
  

   p. 
  186.— 
  Hartman, 
  1944a, 
  pp. 
  334, 
  341; 
  1948, 
  p. 
  41.— 
  Zatsepin, 
  1948, 
  p. 
  

   135, 
  pi. 
  33, 
  fig. 
  3.— 
  Wesenberg-Lund, 
  1950a, 
  p. 
  36; 
  1950b, 
  p. 
  85. 
  

  

  Brada 
  granosa 
  Treadwell, 
  1937, 
  p. 
  32 
  (not 
  B. 
  granosa 
  Stimpson, 
  1854). 
  

  

  Brada 
  inhabilis 
  St0p-Bowitz, 
  1948a, 
  p. 
  40, 
  fig. 
  11; 
  1948b, 
  p. 
  42, 
  fig. 
  16.— 
  Wesen- 
  

   berg-Lund, 
  1951, 
  p. 
  80. 
  

  

  Description. 
  — 
  Length 
  30-60 
  mm., 
  width 
  8-12 
  mm., 
  segments 
  23-26. 
  

   Body 
  subfusiform, 
  grub-shaped, 
  flattened 
  ventrally, 
  strongly 
  arched 
  

   dorsally, 
  usually 
  curved 
  ventrally 
  (in 
  alcohol) 
  . 
  Body 
  surface 
  covered 
  

   with 
  low 
  globular 
  papillae 
  (to 
  naked 
  eye 
  surface 
  appears 
  almost 
  

   smooth, 
  granular), 
  usually 
  with 
  thin 
  layer 
  of 
  sand 
  grains, 
  often 
  with 
  

   an 
  almost 
  uniform 
  layer 
  of 
  larger 
  sand 
  grains 
  on 
  dorsum. 
  Prostomium 
  

   and 
  buccal 
  segment 
  with 
  two 
  groups 
  of 
  tlu-ee 
  to 
  four 
  filiform 
  branchiae, 
  

   pair 
  of 
  grooved 
  palps, 
  and 
  buccal 
  siphon 
  around 
  mouth. 
  First 
  seg- 
  

   ment 
  achaetous 
  (may 
  be 
  few 
  very, 
  delicate 
  capillary 
  setae), 
  second 
  

   segment 
  with 
  two 
  small 
  neurosetae, 
  rest 
  of 
  segments 
  with 
  neuropodia 
  

   as 
  slightly 
  elevated 
  lobes 
  and 
  about 
  four 
  (2-9) 
  amber-colored 
  nem-o- 
  

   setae 
  with 
  curved 
  tips. 
  Without 
  distinct 
  notopodia 
  ; 
  notosetae 
  poorly 
  

   developed, 
  one 
  or 
  two 
  or 
  absent, 
  extremely 
  capillary, 
  easily 
  overlooked. 
  

   Nephridial 
  papillae 
  on 
  ventral 
  side 
  between 
  segments 
  4 
  and 
  5 
  (setigers 
  3 
  

   and 
  4, 
  since 
  the 
  first 
  segment 
  is 
  usually 
  achaetous). 
  Color: 
  In 
  life: 
  

   Orange 
  yellow. 
  In 
  alcohol 
  : 
  Light 
  gray 
  to 
  ashy. 
  

  

  Remarks. 
  — 
  B. 
  granulata 
  Malmgren 
  is 
  herein 
  referred 
  to 
  B. 
  inhabilis, 
  

   following 
  St0p-Bowitz 
  (1948a). 
  B. 
  sublaevis 
  Stimpson 
  should 
  also 
  be 
  

   referred 
  here 
  and 
  not 
  to 
  B. 
  rugosa 
  (Hansen) 
  as 
  indicated 
  by 
  St0p- 
  

   Bowitz 
  (1948a, 
  p. 
  37). 
  

  

  New 
  records. 
  — 
  Arctic 
  Alaska: 
  Off 
  Point 
  Barrow 
  base, 
  up 
  to 
  12.1 
  

   miles 
  from 
  shore, 
  20-123.5 
  fms., 
  on 
  bottoms 
  of 
  rocks, 
  stones, 
  gravel, 
  

   and 
  mass 
  of 
  worm 
  tubes 
  (5 
  stations, 
  9 
  specimens). 
  Northwest 
  

  

  