﻿[13] 
  ANNELIDA 
  CH^TOPODA. 
  719 
  

  

  simple 
  setse 
  in 
  each 
  bundle. 
  The 
  compound 
  setfe 
  of 
  the 
  anterior 
  feet 
  

   have 
  very 
  short 
  terminal 
  articles 
  (figs. 
  25, 
  28). 
  Both 
  the 
  stem 
  and 
  the 
  

   appendix 
  become 
  somewhat 
  longer, 
  going 
  backward, 
  and 
  retain 
  their 
  

   length 
  on 
  the 
  posterior 
  segments 
  (figs. 
  20,29,30). 
  The 
  appendix 
  is 
  

   truncate, 
  with 
  two 
  minute 
  terminal 
  teeth. 
  

  

  The 
  simple 
  seta? 
  (fig. 
  31) 
  are 
  longer 
  on 
  the 
  segments 
  back 
  of 
  the 
  first 
  

   third 
  than 
  on 
  the 
  anterior 
  segments, 
  while 
  the 
  curvature 
  is 
  greater 
  on 
  

   the 
  anterior 
  than 
  on 
  the 
  posterior 
  segments, 
  and 
  on 
  the 
  posterior 
  seg- 
  

   ments 
  they 
  are 
  nearly 
  straight. 
  There 
  is 
  a 
  single 
  acicula 
  in 
  each 
  foot 
  

   (figs. 
  25, 
  27, 
  32), 
  very 
  stout, 
  and 
  with 
  a 
  large 
  terminal 
  button, 
  which 
  

   barely 
  projects 
  from 
  the 
  foot. 
  

  

  The 
  appendix 
  of 
  the 
  compound 
  seta3 
  in 
  this 
  species 
  lacks 
  the 
  covering- 
  

   membrane 
  found 
  on 
  the 
  setse 
  of 
  Strtytosyllis 
  arena 
  W. 
  & 
  B. 
  

  

  The 
  pharynx 
  occupies 
  six 
  segments, 
  and 
  terminates 
  in 
  front 
  in 
  a 
  circle 
  

   of 
  triangular 
  papillae. 
  The 
  stomach 
  is 
  narrow, 
  occupies 
  eight 
  segments, 
  

   narrows 
  slightly 
  behind 
  and 
  passes 
  into 
  the 
  intestine 
  without 
  the 
  inter- 
  

   vention 
  of 
  any 
  peculiar 
  glands 
  ; 
  but 
  the 
  intestine 
  in 
  the 
  first 
  segment 
  

   back 
  of 
  the 
  stomach 
  is 
  colorless. 
  The 
  body 
  is 
  convex 
  above, 
  flattened 
  

   below 
  ; 
  middle 
  third 
  of 
  uniform 
  width, 
  tapering 
  uniformly 
  but 
  gradually 
  

   along 
  the 
  anterior 
  and 
  posterior 
  thirds. 
  

  

  The 
  body 
  is 
  colorless 
  ; 
  the 
  intestine 
  dark 
  brown 
  to 
  black 
  ; 
  pharynx, 
  

   light 
  brown; 
  stomach, 
  white. 
  

  

  $ 
  . 
  The 
  capillary 
  (sexual) 
  seta; 
  begin 
  on 
  the 
  male 
  on 
  the 
  twenty-first 
  

   setigerous 
  segment 
  ; 
  they 
  are 
  short 
  (fig. 
  27), 
  not 
  reaching 
  beyond 
  the 
  

   dorsal 
  cirri, 
  delicate 
  ; 
  they 
  fail 
  only 
  on 
  two 
  or 
  three 
  of 
  the 
  posterior 
  seg- 
  

   ments. 
  The 
  body 
  back 
  of 
  the 
  stomach 
  is 
  much 
  swollen, 
  pure 
  white, 
  but 
  

   retaining 
  the 
  median, 
  intestinal, 
  brown 
  band. 
  

  

  9 
  . 
  The 
  sexual 
  setae 
  of 
  the 
  female 
  also 
  begin 
  on 
  the 
  twenty-first 
  seti- 
  

   gerous 
  segment, 
  but 
  they 
  are 
  very 
  long 
  and 
  delicate 
  (tig. 
  20). 
  The 
  eggs 
  

   are 
  few, 
  large, 
  irregularly 
  polygonal, 
  pure 
  white. 
  

  

  Dimensions 
  of 
  adult 
  non-sexual 
  forms: 
  Length, 
  6-S 
  mni 
  ; 
  width, 
  

   0.6-0.8"™. 
  

  

  We 
  found 
  this 
  species 
  at 
  West 
  Quoddy 
  in 
  coarse 
  sand 
  and 
  gravel, 
  at 
  

   low 
  water. 
  The 
  area 
  over 
  which 
  it 
  occurred 
  was 
  small, 
  and 
  although 
  

   diligently 
  looked 
  for, 
  it 
  was 
  not 
  found 
  in 
  any 
  other 
  locality. 
  

  

  EUSYLLIS 
  Malmgren. 
  

  

  Quite 
  a 
  number 
  of 
  specimens 
  of 
  some 
  species 
  of 
  this 
  genus 
  were 
  

   taken. 
  They 
  did 
  not 
  seem 
  to 
  agree 
  perfectly 
  with 
  any 
  described 
  species, 
  

   but 
  were 
  not 
  described 
  while 
  living 
  and 
  are 
  not 
  now 
  in 
  a 
  condition 
  to 
  

   admit 
  of 
  accurate 
  description. 
  

  

  PTEEOSYLLIS 
  Glaparede. 
  

  

  GatlioJa 
  cincinnatta 
  Veeeill. 
  Proc. 
  A. 
  A. 
  A. 
  S., 
  p. 
  394, 
  pi. 
  2, 
  fig. 
  1 
  (no 
  description). 
  

  

  1874. 
  

   Ptero8yllis 
  tincinn 
  a 
  tta 
  Veeeill. 
  Trans. 
  Conn. 
  Acad., 
  p. 
  308. 
  

  

  Bare; 
  20-30 
  fathoms; 
  rocks 
  and 
  shells, 
  

  

  