﻿720 
  REPORT 
  OP 
  COMMISSIONER 
  OP 
  FISH 
  AND 
  FISHERIES. 
  [14] 
  

  

  SPH^EROSYLLIS 
  Claparedc. 
  

  

  Spii^erosyllis 
  brevier 
  ons 
  Webster 
  & 
  Benedict. 
  

  

  Only 
  one 
  specimen 
  was 
  found. 
  Sand 
  ; 
  low 
  water. 
  

  

  Sphverosyllis 
  longicauda, 
  n. 
  sp. 
  

  

  (Pl. 
  Ill, 
  Figs. 
  35-39.) 
  

  

  The 
  sides 
  and 
  front 
  of 
  the 
  bead 
  arc 
  regularly 
  rounded, 
  posterior 
  mar- 
  

   gin 
  nearly 
  straight 
  ; 
  the 
  width 
  almost 
  double 
  the 
  length. 
  The 
  palpi 
  

   project 
  slightly 
  beyond 
  the 
  head 
  (fig. 
  35); 
  there 
  is 
  a 
  shallow 
  anterior 
  

   emargination, 
  and 
  an 
  impressed 
  line 
  above 
  and 
  below. 
  

  

  The 
  antennae 
  and 
  tentacular 
  cirri 
  are 
  short, 
  stout, 
  fusiform, 
  suddenly 
  

   acuminate 
  near 
  the 
  end. 
  The 
  buccal 
  segment 
  is 
  short, 
  but 
  perfectly 
  

   well 
  defined. 
  

  

  There 
  are 
  six 
  eyes 
  ; 
  posterior 
  pair 
  largest, 
  situated 
  on 
  the 
  median 
  

   line 
  in 
  advance 
  of 
  the 
  median 
  antenna, 
  lateral, 
  oval 
  ; 
  middle 
  pair 
  well 
  

   within 
  and 
  just 
  in 
  front 
  of 
  the 
  posterior 
  pair, 
  small, 
  circular; 
  anterior 
  

   pair 
  on 
  the 
  front 
  margin 
  of 
  the 
  head, 
  within 
  the 
  base 
  of 
  the 
  lateral 
  an- 
  

   tenna?, 
  minute, 
  circular. 
  

  

  The 
  dorsal 
  cirri 
  of 
  a 
  few 
  of 
  the 
  anterior 
  segments 
  are 
  shaped 
  like 
  the 
  

   antennas, 
  but 
  longer 
  (fig. 
  35) 
  ; 
  further 
  back 
  the 
  basal 
  swelling 
  becomes 
  

   less 
  (fig. 
  37) 
  and 
  the 
  length 
  greater, 
  while 
  on 
  the 
  extreme 
  posterior 
  

   segments 
  they 
  again 
  become 
  enlarged 
  at 
  base 
  without 
  falling 
  off 
  in 
  

   length 
  (fig. 
  3G). 
  

  

  The 
  anal 
  segment 
  is 
  a 
  little 
  longer 
  than 
  the 
  one 
  preceding 
  it, 
  hex- 
  

   agonal 
  (fig. 
  36); 
  it 
  bears 
  three 
  cirri, 
  of 
  which 
  the 
  lateral 
  pair 
  have 
  the 
  

   form 
  of 
  the 
  median 
  dorsal 
  cirri, 
  but 
  are 
  longer 
  ; 
  the 
  median 
  cirrus 
  is 
  

   short, 
  cylindrical. 
  In 
  each 
  bundle 
  of 
  seta? 
  is 
  a 
  long, 
  pointed, 
  simple 
  

   seta 
  ; 
  the. 
  compound 
  seta? 
  have 
  long 
  stems, 
  and 
  for 
  the 
  genus 
  long 
  ter- 
  

   minal 
  articles 
  (figs. 
  38, 
  39). 
  

  

  Scattered 
  over 
  the 
  body 
  and 
  feet 
  (fig. 
  37) 
  are 
  numerous 
  cylindrical 
  

   papillae. 
  The 
  body 
  is 
  convex 
  above, 
  flattened 
  below, 
  widest 
  in 
  the 
  

   middle, 
  tapering 
  slightly 
  in 
  both 
  directions, 
  colorless 
  or 
  yellowish 
  white. 
  

  

  The 
  females 
  were 
  found 
  carrying 
  eggs 
  during 
  the 
  entire 
  time 
  of 
  our 
  

   stay 
  in 
  Eastport 
  (from 
  the 
  middle 
  of 
  June 
  to 
  September). 
  The 
  eggs 
  

   were 
  arranged 
  in 
  lour 
  series 
  on 
  the 
  dorsum, 
  one 
  between 
  the 
  feet 
  and 
  

   the 
  dorsal 
  cirri, 
  another 
  just 
  within 
  the 
  dorsal 
  cirri, 
  on 
  each 
  side, 
  leaving 
  

   a 
  narrow, 
  naked, 
  median 
  space 
  ; 
  they 
  were 
  spherical, 
  white. 
  The 
  sex- 
  

   ual 
  seta? 
  begin 
  in 
  both 
  sexes 
  on 
  the 
  sixth 
  setigerous 
  segment 
  ; 
  in 
  the 
  

   female, 
  their 
  length 
  was 
  four 
  times 
  the 
  width 
  of 
  the 
  body 
  ; 
  in 
  the 
  male, 
  

   one-half 
  this 
  length. 
  

  

  Length, 
  2.5-4 
  mm 
  . 
  

  

  Width, 
  0.25-0.35""". 
  

  

  Low 
  water, 
  sand 
  ; 
  20-30 
  fathoms, 
  shells 
  and 
  rocks. 
  

  

  