﻿738 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [32] 
  

  

  Family 
  AB1CIIDM. 
  

   SOOLOPLOS 
  (Blnv.) 
  (Ersted. 
  

  

  SCOLOPLOS 
  ARMIGER 
  (Blnv.) 
  (Erstid. 
  

  

  Scoloplos 
  armiger 
  Blainville. 
  Diet. 
  Sc. 
  Nat., 
  Torn. 
  57 
  (teste 
  Malmgren). 
  

  

  Aricia 
  Miilleri 
  Rathke. 
  Beitriige 
  zur 
  Fauna 
  Norwegens. 
  p. 
  176, 
  pi. 
  viii, 
  figs. 
  9-15. 
  

  

  1840. 
  

   Scoloplos 
  armiger 
  GSrsted. 
  Ann. 
  Dan. 
  Comp., 
  p. 
  37, 
  figs. 
  8, 
  106, 
  107, 
  109. 
  1843. 
  

   Scoloplos 
  armiger 
  Malmgren. 
  Ann. 
  Polych., 
  p. 
  72. 
  1867. 
  

   Anthostoma 
  acutum 
  Vekrill. 
  Invert. 
  An. 
  of 
  Vin. 
  Sound, 
  p. 
  599. 
  1874. 
  

  

  There 
  seems 
  to 
  be 
  no 
  doubt 
  as 
  to 
  the 
  identity 
  of 
  the 
  forms 
  referred 
  

   to 
  above. 
  No 
  one 
  except 
  Professor 
  Verrill 
  has 
  seen 
  the 
  divided 
  or 
  lobed 
  

   proboscis, 
  which 
  led 
  him 
  to 
  refer 
  this 
  species 
  to 
  Anthostoma. 
  But 
  this 
  

   is 
  not 
  strange, 
  as 
  the 
  proboscis 
  is 
  rarely 
  extended, 
  and 
  one 
  may 
  exam- 
  

   ine 
  many 
  individuals 
  without 
  once 
  seeing 
  one 
  in 
  that 
  condition. 
  OEer- 
  

   sted 
  makes 
  the 
  branchiae 
  begin 
  on 
  the 
  fifteenth 
  segment, 
  but 
  the 
  anterior 
  

   branchiae 
  are 
  very 
  small, 
  and 
  readily 
  escape 
  observation. 
  Malmgren 
  

   identifies 
  this 
  species 
  with 
  Aricia 
  Miilleri 
  Eathke. 
  The 
  figures 
  of 
  

   Eathke 
  show 
  the 
  small 
  anterior 
  branchiae. 
  GSrsted 
  also 
  says 
  there 
  are 
  

   no 
  anal 
  cirri 
  ; 
  these, 
  however, 
  fall 
  off 
  readily. 
  

  

  Common 
  in 
  sand 
  at 
  low 
  water. 
  

  

  NAIDONEBEIS 
  Blainville 
  {teste 
  Malmgren). 
  

  

  Naidonereis 
  quadricuspida 
  Malmgren. 
  

  

  (Pl. 
  VI, 
  Figs. 
  90-92.) 
  

  

  Kais 
  quadricuspida 
  Fabricius. 
  Fauna 
  Gronl., 
  p. 
  315. 
  1780. 
  

  

  Nainereis 
  quadricuspida 
  Blainville. 
  Diet. 
  Sc. 
  Nat., 
  Tom. 
  57, 
  p. 
  440 
  (/es/e 
  Malmgren 
  ;. 
  

   Scoloplos 
  quadricuspida 
  (Ersted. 
  Gronl. 
  Ann. 
  Dors., 
  p. 
  48, 
  figs. 
  106-111. 
  1843. 
  

   Aricia 
  quadricuspida 
  Leuckart. 
  Arch. 
  Naturg., 
  vol. 
  s, 
  p. 
  198, 
  pl. 
  3, 
  fig. 
  11 
  (teste 
  Malm- 
  

   gren). 
  

   Naidoneris 
  quadricuspida 
  Malmgren. 
  Annulata 
  Polycli., 
  p. 
  73. 
  1867. 
  

  

  This 
  species 
  has 
  a 
  pair 
  of 
  minute 
  black 
  eyes, 
  hard 
  to 
  find 
  even 
  on 
  fresh 
  

   specimens, 
  and 
  not 
  to 
  be 
  found 
  on 
  alcoholic 
  forms. 
  The 
  first 
  two 
  seg- 
  

   ments 
  are 
  without 
  appendages 
  of 
  any 
  kind. 
  The 
  branchiae 
  appear 
  on 
  

   the 
  fifth 
  setigerous 
  segment, 
  nearly 
  full 
  size 
  from 
  the 
  first 
  ; 
  on 
  a 
  few 
  of 
  

   the 
  posterior 
  segments 
  they 
  fall 
  off 
  a 
  little 
  in 
  size. 
  

  

  The 
  dorsal 
  setae 
  are 
  long, 
  delicate, 
  transversely 
  striated; 
  at 
  the 
  lower 
  

   part 
  of 
  each 
  dorsal 
  bundle 
  are 
  one 
  or 
  two 
  shorter 
  and 
  stouter 
  setae, 
  with 
  

   bifurcate 
  extremity 
  (fig. 
  90). 
  The 
  ventral 
  setae 
  on 
  the 
  anterior 
  seg- 
  

   ments 
  are 
  in 
  three 
  or 
  four 
  series, 
  and 
  of 
  two 
  kinds. 
  The 
  anterior 
  are 
  

   short, 
  stout 
  spines 
  (fig. 
  91); 
  those 
  of 
  the 
  posterior 
  series 
  similar 
  to 
  the 
  

   dorsal 
  setae. 
  From 
  about 
  the 
  eighth 
  setigerous 
  segment 
  the 
  spines 
  de- 
  

   crease 
  in 
  number, 
  and 
  disappear 
  at 
  the 
  fifteenth. 
  Each 
  ventral 
  ramus 
  

   has 
  three 
  aciculae 
  (fig. 
  92). 
  

  

  Back 
  of 
  each 
  ventral 
  bundle 
  of 
  setae, 
  on 
  the 
  first 
  twelve 
  segments, 
  ia 
  

  

  