﻿316 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  inal 
  segments 
  with 
  enlarged, 
  rounded, 
  padlike, 
  achaetous 
  notopodial 
  

   lobes. 
  Neuropodial 
  cirri 
  poorly 
  developed 
  or 
  lacking. 
  Pygidium 
  with 
  

   several 
  small 
  papillae? 
  Colorless 
  in 
  alcohol. 
  Tube 
  thin, 
  membra- 
  

   nous, 
  with 
  sand 
  and 
  debris, 
  rather 
  straggly. 
  

  

  New 
  records. 
  — 
  Arctic 
  Alaska: 
  West 
  side 
  Elson 
  Lagoon 
  near 
  en- 
  

   trance 
  to 
  small 
  lagoon 
  to 
  west, 
  near 
  Point 
  Barrow 
  (rather 
  brackish 
  

   water), 
  1.2 
  fms. 
  (1 
  station, 
  1 
  specimen). 
  

  

  Distribution. 
  — 
  Scattered 
  records 
  in 
  the 
  Arctic 
  : 
  Siberian 
  and 
  Alaskan 
  

   Arctic, 
  Spitsbergen, 
  Barents 
  Sea, 
  Kara 
  Sea, 
  Laptev 
  Sea. 
  In 
  L2-11 
  

   fathoms. 
  

  

  Ampharete 
  acutifrons 
  (Grube, 
  1860) 
  

  

  Figure 
  36, 
  b-d 
  

  

  Amphideis 
  acutifrons 
  Grube, 
  1860, 
  p. 
  109, 
  pi. 
  5, 
  fig. 
  6. 
  

  

  Ampharete 
  grubei 
  Malmgren, 
  1865, 
  p. 
  363, 
  pi. 
  19, 
  fig. 
  44. 
  — 
  Eliason, 
  1920, 
  p. 
  70. 
  — 
  

  

  Fauvel, 
  1927, 
  p. 
  227, 
  fig. 
  79, 
  a-p.— 
  Augener, 
  1928, 
  p. 
  776.— 
  Thorson, 
  1946, 
  

  

  p. 
  121, 
  fig. 
  66.— 
  Hartman, 
  1948, 
  p. 
  43. 
  

   Ampharete 
  cirrata 
  Webster 
  and 
  Benedict, 
  1887, 
  p. 
  747, 
  pi. 
  8, 
  figs. 
  110-112. 
  

   Ampharete 
  trilobata 
  Webster 
  and 
  Benedict, 
  1887, 
  p. 
  747. 
  

   Ampharete 
  acutifrons 
  Hessle, 
  1917, 
  p. 
  96. 
  — 
  Annenkova, 
  1937, 
  p. 
  188; 
  1938, 
  p. 
  

  

  200.— 
  Zatsepin, 
  1948, 
  p. 
  150, 
  pi. 
  37, 
  fig. 
  8.— 
  Wesenberg-Lund, 
  1950a, 
  p. 
  47; 
  

  

  1950b, 
  p. 
  109; 
  1951, 
  p. 
  102. 
  

  

  Description. 
  — 
  Length 
  45 
  mm., 
  width 
  6 
  mm. 
  (up 
  to 
  56 
  mm. 
  long, 
  

   8 
  mm. 
  wide 
  — 
  Wiren, 
  1883). 
  Paleae 
  slender, 
  taper 
  gradually 
  to 
  long, 
  

   delicate 
  tips, 
  may 
  be 
  somewhat 
  curved, 
  10-30 
  in 
  each 
  group. 
  Bran- 
  

   chiae 
  in 
  two 
  groups 
  separated 
  middorsally, 
  each 
  group 
  with 
  three 
  

   branchiae 
  in 
  transverse 
  line 
  and 
  one 
  slightly 
  more 
  posterior. 
  Abdom- 
  

   inal 
  segments 
  12. 
  With 
  neuropodial 
  cirri 
  small, 
  conical 
  to 
  quite 
  

   long, 
  longer 
  than 
  pinnule 
  (weU 
  developed 
  on 
  Point 
  Barrow 
  specimens). 
  

   Pygidium 
  a 
  short 
  ring 
  bearing 
  a 
  circle 
  of 
  numerous 
  subequal 
  anal 
  

   cirri 
  (2 
  lateral 
  ones 
  may 
  be 
  longer). 
  Colorless 
  in 
  alcohol. 
  Tube 
  

   membranous, 
  covered 
  with 
  soft, 
  gray 
  debris 
  (or 
  agglutinated 
  mud). 
  

  

  Remarks. 
  — 
  The 
  types 
  of 
  Ampharete 
  cirrata 
  Webster 
  and 
  Benedict 
  

   from 
  Eastport, 
  Maine, 
  were 
  examined. 
  This 
  species 
  was 
  separated 
  

   on 
  the 
  basis 
  of 
  the 
  relative 
  development 
  of 
  the 
  neuropodial 
  cirri, 
  

   which 
  appears 
  to 
  be 
  somewhat 
  variable. 
  The 
  types 
  of 
  A. 
  trilobata 
  

   Webster 
  and 
  Benedict, 
  also 
  from 
  Eastport, 
  were 
  not 
  available, 
  but 
  

   this 
  species 
  also, 
  according 
  to 
  the 
  original 
  description, 
  was 
  differen- 
  

   tiated 
  by 
  the 
  relative 
  development 
  of 
  the 
  cirri. 
  

  

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

   Point 
  Barrow; 
  Point 
  Barrow 
  base, 
  washed 
  ashore; 
  off 
  Point 
  Barrow 
  

   base, 
  up 
  to 
  6 
  miles 
  from 
  shore, 
  3.7-49 
  fms., 
  on 
  bottoms 
  of 
  mud, 
  and 
  

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

  

  