﻿744 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [38] 
  

  

  tainly) 
  in 
  having 
  two 
  pairs 
  of 
  appendages 
  on 
  the 
  second 
  segment. 
  For 
  

   the 
  present 
  the 
  generic 
  diagnosis 
  will 
  stand 
  as 
  follows 
  : 
  

  

  Head 
  with 
  antennas 
  projecting 
  from 
  the 
  anterior 
  margin 
  ; 
  branchiae 
  

   beginning 
  on 
  the 
  buccal 
  segment, 
  limited 
  to 
  the 
  anterior 
  segments 
  ; 
  

   second 
  segment 
  with 
  a 
  pair 
  of 
  short 
  cirri 
  in 
  addition 
  to 
  the 
  branchiae 
  ; 
  

   ventral 
  setae 
  compound, 
  found 
  first 
  on 
  the 
  third 
  segment 
  ; 
  dorsal 
  setae 
  

   capillary, 
  appearing 
  first 
  on 
  the 
  fourth 
  segment. 
  

  

  Ledon 
  sexoculata, 
  n. 
  sp. 
  

  

  (Pl. 
  VIII, 
  Figs. 
  108, 
  109.) 
  

  

  Head 
  pentagonal, 
  posterior 
  margin 
  straight, 
  width 
  slightly 
  greater 
  

   than 
  the 
  length 
  ; 
  attennae 
  flattened, 
  fusiform, 
  wide, 
  as 
  long 
  as 
  the 
  head, 
  

   distant 
  from 
  each 
  other 
  at 
  origin 
  by 
  about 
  their 
  own 
  width. 
  

  

  Eyes 
  six, 
  circular, 
  lateral, 
  situated 
  at 
  the 
  angles 
  of 
  a 
  hexagon, 
  mid- 
  

   dle 
  pair 
  largest. 
  

  

  Segments 
  1 
  to 
  5 
  or 
  6 
  each, 
  with 
  a 
  pair 
  of 
  branchiae 
  three 
  to 
  four 
  

   times 
  as 
  long 
  as 
  the 
  width 
  of. 
  the 
  body, 
  club-shaped, 
  stout. 
  

  

  Second 
  segment 
  with 
  a 
  pair 
  of 
  cylindrical 
  cirri, 
  about 
  one-eighth 
  as 
  

   long 
  as 
  the 
  branchiae 
  and 
  placed 
  beneath 
  them. 
  

  

  The 
  ventral 
  setae 
  appear 
  on 
  the 
  third 
  segment. 
  They 
  are 
  compound 
  

   (fig. 
  108), 
  hooked 
  near 
  the 
  end, 
  and 
  with 
  a 
  straight 
  delicate 
  spine 
  orig- 
  

   inating 
  a 
  little 
  below 
  the 
  terminal 
  hook 
  and 
  projecting 
  beyond 
  it. 
  On 
  

   a 
  few 
  of 
  the 
  anterior 
  segments 
  there 
  are 
  two 
  of 
  these 
  setae 
  in 
  each 
  ven- 
  

   tral 
  ramus 
  ; 
  farther 
  back, 
  only 
  one. 
  

  

  Beginning 
  with 
  the 
  fourth 
  segment, 
  there 
  is 
  a 
  single, 
  long, 
  capillary 
  

   seta 
  in 
  each 
  dorsal 
  ramus 
  (fig. 
  109). 
  

  

  The 
  anterior 
  part 
  of 
  the 
  body 
  is 
  densely 
  covered 
  with 
  minute 
  cylin- 
  

   drical 
  papillae. 
  Body 
  cylindrical 
  ; 
  anterior 
  segments 
  short, 
  gaining 
  in 
  

   length 
  until 
  their 
  length 
  and 
  width 
  are 
  about 
  equal. 
  

  

  Anal 
  segment 
  truncated, 
  margin 
  thickened 
  ; 
  on 
  the 
  ventral 
  surface 
  

   two 
  small 
  rounded 
  projections. 
  

  

  Body 
  covered 
  with 
  dirt 
  ; 
  general 
  color 
  light 
  green. 
  

  

  Length, 
  6-8 
  rom 
  . 
  

  

  Width, 
  0.4-0.5 
  mm 
  . 
  

  

  Rare; 
  sand 
  and 
  shells; 
  8-12 
  fathoms. 
  

  

  Family 
  CAPITELLID^ 
  

  

  CAPITELLA 
  Blainville. 
  

  

  Capitella 
  capitata 
  van 
  Beneden. 
  

  

  Lumbr'wus 
  capitatus 
  Fabricius. 
  Fauna 
  Gronl., 
  p. 
  279. 
  1780. 
  

  

  Capitella 
  capitata 
  van 
  Beneden. 
  Bull. 
  Acad, 
  de 
  Belg., 
  2d 
  series, 
  vol. 
  3, 
  p. 
  13?, 
  with 
  

   2 
  plates 
  {teste 
  Quatrefga. 
  ). 
  

  

  While 
  the 
  specimens 
  taken 
  at 
  Eastport 
  seem 
  certainly 
  to 
  belong 
  to 
  

   this 
  species, 
  both 
  the 
  young 
  and 
  the 
  adults 
  have 
  two 
  minute 
  black 
  

   eyes. 
  

  

  