﻿[29] 
  ANNELIDA 
  CILETOPODA. 
  735 
  

  

  The 
  body 
  is 
  flattened 
  both 
  above 
  and 
  below 
  in 
  front, 
  slightly 
  eonvex 
  

   farther 
  back, 
  tapering 
  - 
  slightly 
  along 
  the 
  posterior 
  half. 
  General 
  color 
  

   white 
  or 
  yellowish-white; 
  tenacles 
  white; 
  setae 
  yellow, 
  or 
  yellowish- 
  

   brown. 
  

  

  Length 
  probably 
  about 
  8-12""". 
  

  

  Width, 
  1.5-2""". 
  

  

  Common, 
  8-10 
  fathoms, 
  mud. 
  

  

  Family 
  SPIONIDJE. 
  

  

  SCOLECOLEPIS 
  Blainville. 
  

  

  Scolecolepis 
  cirrata 
  Malmgren. 
  

  

  Nerine 
  cirraia 
  Saks. 
  Bidrag 
  til 
  Kundskaben 
  oui 
  Norges 
  Annelider, 
  p. 
  15. 
  1861. 
  

   Scolcco1q>is 
  cirraia 
  Malmgren. 
  Annulata 
  PolyoliaBta, 
  p. 
  91, 
  pi. 
  9, 
  fig. 
  54. 
  1S07. 
  

  

  Only 
  one 
  specimen 
  was 
  obtained, 
  an 
  anterior, 
  badly 
  mutilated 
  part. 
  

   SPIONIDES, 
  n. 
  g. 
  

  

  Much 
  like 
  Scolecolepis, 
  but 
  distinguished 
  from 
  it 
  by 
  the 
  possession 
  

   of 
  lateral 
  pouches 
  between 
  the 
  ventral 
  rami, 
  beginning 
  near 
  the 
  ante- 
  

   rior 
  end, 
  and 
  continued 
  to 
  the 
  posterior 
  third. 
  

  

  This 
  form 
  is 
  very 
  closely 
  related 
  to 
  Scolecolepis 
  cirrata 
  Malmgren. 
  

   We 
  have 
  no 
  good 
  specimens 
  of 
  that 
  species 
  for 
  comparison. 
  It 
  seems 
  

   certain, 
  however, 
  that 
  the 
  peculiarity 
  mentioned 
  above 
  could 
  not 
  have 
  

   escaped 
  observation. 
  

  

  The 
  material 
  for 
  description 
  is 
  not 
  very 
  good, 
  as 
  we 
  only 
  found 
  three 
  

   specimens, 
  all 
  more 
  or 
  less 
  injured. 
  

  

  Spionides 
  cirratus, 
  n. 
  sp. 
  

  

  (Pl. 
  VI, 
  Figs. 
  8G-89.) 
  

  

  Head 
  wide 
  in 
  front, 
  narrow 
  behind, 
  continued 
  backward 
  as 
  a 
  carina 
  

   on 
  three 
  segments. 
  Two 
  pairs 
  of 
  eyes, 
  minute, 
  lateral, 
  pink 
  ; 
  one 
  pair 
  

   on 
  the 
  middle 
  line 
  of 
  the 
  head; 
  the 
  second 
  pair, 
  posterior. 
  A 
  minute 
  

   antenna 
  or 
  occipital 
  tentacle, 
  posterior. 
  Buccal 
  segment 
  visible 
  from 
  

   above 
  only 
  at 
  the 
  sides 
  of 
  the 
  head; 
  tentacles 
  white, 
  not 
  very 
  long, 
  

   deeply 
  canaliculated, 
  margins 
  of 
  the 
  canal 
  scolloped. 
  

  

  The 
  branchiae 
  begin 
  on 
  the 
  third 
  setigerous 
  segment, 
  13 
  pairs. 
  

  

  The 
  anterior 
  feet 
  have 
  the 
  form 
  shown 
  in 
  fig. 
  86, 
  behind 
  the 
  bran- 
  

   chiae, 
  as 
  in 
  fig. 
  87. 
  

  

  After 
  the 
  first 
  few 
  segments 
  the 
  membranous 
  pouches 
  appear 
  be- 
  

   tween 
  the 
  ventral 
  rami. 
  They 
  are 
  formed 
  by 
  a 
  delicate 
  membrane 
  with 
  

   free 
  upper 
  margin, 
  which 
  curves 
  outward 
  between 
  the 
  ventral 
  rami, 
  

   and 
  is 
  prolonged 
  down 
  the 
  sides 
  of 
  the 
  body 
  below 
  the 
  rami, 
  forming 
  a 
  

   series 
  of 
  deep 
  pouches 
  with 
  crescentic 
  opening 
  above. 
  The 
  membrane 
  

   is 
  continuous, 
  but 
  is 
  attached 
  to 
  the 
  body 
  above 
  each 
  ventral 
  ramus, 
  

  

  