﻿UN 
  A 
  NEW 
  SFECIliS 
  OF 
  THE 
  GENUS 
  HAl'LOTAXIS. 
  307 
  

  

  distance 
  ; 
  then 
  it 
  curves 
  outwards 
  and 
  downwards 
  towards 
  

   the 
  latero-ventral 
  angle 
  of 
  tlie 
  body-wall, 
  which 
  it 
  penetrates 
  

   well 
  within 
  the 
  Segment 
  XIII, 
  to 
  open 
  just 
  anterior 
  and 
  

   external 
  to 
  the 
  ventral 
  clia^ta. 
  The 
  pore 
  is 
  overlapped 
  by 
  a 
  

   pi'ominent 
  flap, 
  Avliich 
  seems 
  to 
  be 
  entirely 
  due 
  to 
  the 
  greater 
  

   development 
  oE 
  the 
  muscular 
  coats 
  of 
  the 
  body-wall 
  in 
  this 
  

   segment 
  (fig. 
  42). 
  The 
  position 
  of 
  this 
  pore 
  so 
  far 
  back 
  in 
  

   its 
  segment 
  is 
  a 
  very 
  unusual 
  one 
  ; 
  for 
  in 
  nearly 
  all 
  the 
  

   " 
  limicoline" 
  Oligochajtes 
  the 
  pore 
  is 
  intersegmental, 
  and 
  even 
  

   in 
  the 
  earthworms 
  it 
  is 
  usually 
  nearer 
  the 
  margin 
  of 
  the 
  seg- 
  

   ment 
  than 
  it 
  is 
  in 
  the 
  present 
  worm. 
  

  

  It 
  should 
  be 
  stated 
  that 
  in 
  the 
  younger 
  individual 
  the 
  testes 
  

   and 
  ovaries 
  are 
  quite 
  small, 
  and 
  except 
  for 
  the 
  rather 
  larger 
  

   nuclei 
  in 
  the 
  female 
  gonad 
  and 
  a 
  more 
  compact 
  outline 
  of 
  the 
  

   organ, 
  there 
  is 
  no 
  difference 
  between 
  the 
  two 
  sexes; 
  yet 
  in 
  

   it 
  the 
  oviduct 
  has 
  already 
  the 
  character 
  described 
  for 
  the 
  

   adult 
  — 
  a 
  comparatively 
  wide 
  tube 
  (figs. 
  43, 
  45) 
  with 
  a 
  wide 
  

   funnel-shaped 
  opening 
  into 
  the 
  coelom; 
  the 
  duct 
  is 
  trace- 
  

   able 
  as 
  far 
  as 
  the 
  body-wall, 
  which 
  it 
  reaches 
  near 
  to 
  the 
  

   ventral 
  cha3ta3. 
  

  

  There 
  is 
  a 
  striking 
  difference 
  both 
  in 
  dimension 
  and 
  in 
  

   structure 
  between 
  the 
  oviduct 
  and 
  sperm-duct, 
  for 
  whereas 
  

   the 
  latter 
  has 
  a 
  very 
  narrow 
  lumen, 
  which 
  appears 
  to 
  be 
  a 
  

   perforation 
  through 
  a 
  string 
  of 
  cells 
  and 
  is 
  in 
  many 
  respects 
  

   like 
  a 
  nephridium, 
  the 
  oviduct 
  is 
  quite 
  a 
  wide 
  tube, 
  sur- 
  

   rounded 
  by 
  an 
  epithelium 
  of 
  several 
  cells, 
  or, 
  at 
  any 
  rate, 
  

   a 
  multinuclear 
  syncytium, 
  bearing 
  long 
  cilia 
  within 
  (figs. 
  

   44, 
  46). 
  

  

  The 
  oviducal 
  funnel 
  does 
  not 
  project 
  much 
  into 
  the 
  seg- 
  

   ment, 
  and 
  in 
  the 
  younger 
  individual 
  has 
  an 
  appearance 
  quite 
  

   different 
  from 
  that 
  presented 
  by 
  the 
  young 
  sperm- 
  funnels, 
  

   which 
  are 
  merely 
  smaller 
  representatives 
  of 
  the 
  adult 
  con- 
  

   dition. 
  The 
  oviducal 
  funnel, 
  however, 
  is 
  here 
  but 
  little 
  defined 
  

   (fig. 
  45) 
  ; 
  the 
  duct 
  appears 
  in 
  longitudinal 
  section 
  as 
  if 
  the 
  

   septum 
  were 
  pouched 
  backwards 
  to 
  form 
  a 
  tube, 
  which 
  tube 
  

   is 
  lined 
  by 
  cells 
  bearing 
  cilia. 
  The 
  lip 
  of 
  the 
  funnel, 
  how- 
  

   ever, 
  IS 
  dl 
  defined 
  ; 
  its 
  upper 
  margin 
  is 
  distinct 
  eiiuugh 
  and 
  

  

  