﻿SOME 
  NEW 
  SPECIES 
  OF 
  THE 
  GENUS 
  PHHEODHILUS. 
  285 
  

  

  sections. 
  In 
  the 
  former 
  1 
  first 
  studied 
  the 
  apparatus 
  while 
  

   still 
  in 
  situ 
  in 
  its 
  half 
  of 
  the 
  body 
  as 
  an 
  opaque 
  object; 
  it 
  

   was 
  then 
  gently 
  removed 
  from 
  its 
  attachraeut 
  to 
  the 
  body- 
  

   wall 
  near 
  the 
  pore, 
  and 
  later 
  cleared 
  in 
  glycerine, 
  in 
  which 
  it 
  

   was 
  possible 
  to 
  turn 
  it 
  over 
  and 
  examine 
  first 
  one 
  side, 
  then 
  

   the 
  other. 
  Finally, 
  it 
  was 
  stained 
  and 
  mounted 
  in 
  balsam. 
  

   But, 
  as 
  is 
  known 
  to 
  students 
  of 
  the 
  Oligochfeta, 
  the 
  glycerine 
  

   preparation 
  is 
  of 
  greater 
  value 
  in 
  tracing 
  out 
  ducts, 
  etc., 
  

   than 
  the 
  balsam 
  preparation. 
  

  

  The 
  entire 
  apparatus 
  is 
  shown 
  in 
  fig. 
  16, 
  which 
  represents 
  

   a 
  combination 
  of 
  views 
  of 
  the 
  two 
  sides, 
  obtained 
  by 
  the 
  

   above 
  methods 
  of 
  study. 
  It 
  is 
  strikingly 
  different 
  from, 
  and 
  

   altogether 
  simpler 
  than 
  that 
  of. 
  P. 
  subterraneus. 
  

  

  The 
  flat 
  circular 
  funnel 
  rests 
  against 
  Septum 
  XI/XII 
  ; 
  the 
  

   sperm-duct, 
  after 
  passing 
  through 
  the 
  septum, 
  winds 
  to 
  and 
  

   fro 
  in 
  rather 
  a 
  complicated 
  course 
  in 
  between 
  two 
  of 
  the 
  

   limbs 
  of 
  a 
  blind 
  glandular 
  diverticulum, 
  or 
  spermiducal 
  

   gland, 
  which 
  is 
  curved 
  in 
  the 
  form 
  of 
  an 
  S, 
  and 
  its 
  free 
  end 
  

   lies 
  close 
  behind 
  the 
  Septum 
  Xl/XII. 
  

  

  The 
  sperm-duct 
  joins 
  the 
  opposite 
  extremity 
  of 
  the 
  gland, 
  

   also 
  near 
  the 
  anterior 
  wall 
  of 
  the 
  Segment 
  XII. 
  

  

  Thus 
  far 
  there 
  is 
  a 
  fairly 
  close 
  agreement 
  with 
  Beddard's 
  

   figure 
  and 
  description; 
  but 
  it 
  is 
  in 
  regard 
  to 
  the 
  contents 
  of 
  the 
  

   muscular 
  sac 
  that 
  the 
  present 
  species 
  differs 
  from 
  his 
  species. 
  

  

  This 
  "atrial 
  sac" 
  — 
  as 
  Beddard 
  terms 
  it 
  — 
  is 
  bound 
  to 
  the 
  

   ventral 
  body-wall 
  by 
  numerous 
  muscle-fibres 
  (mw.), 
  which 
  

   radiate 
  from 
  the 
  body-wall 
  and 
  encircle 
  the 
  sac 
  ; 
  it 
  contains 
  

   a 
  tube, 
  or 
  " 
  atrium," 
  resulting 
  from 
  the 
  union 
  of 
  the 
  gland 
  

   and 
  the 
  duct; 
  but 
  this 
  atrium 
  differs 
  from 
  that 
  in 
  Beddard's 
  

   species 
  in 
  the 
  following 
  points 
  : 
  — 
  (a) 
  It 
  is 
  of 
  practically 
  uniform 
  

   diameter 
  throughout 
  its 
  course; 
  (b) 
  it 
  is 
  relatively 
  short, 
  

   (c) 
  and 
  is 
  only 
  slightly 
  convoluted 
  ; 
  while, 
  finally 
  (d), 
  it 
  

   terminates 
  in 
  a 
  distinct 
  penis, 
  which 
  projects 
  into 
  a 
  "penial 
  

   sac 
  " 
  or 
  sheath, 
  which 
  in 
  turn 
  communicates 
  with 
  the 
  exterior 
  

   at 
  the 
  male 
  pore. 
  

  

  There 
  is 
  in 
  the 
  present 
  species 
  no 
  trace 
  of 
  the 
  much 
  convo- 
  

   luted, 
  narrow 
  continuation 
  of 
  the 
  sperm-duct 
  within 
  the 
  atrial 
  

  

  VOL. 
  48, 
  PART 
  2. 
  — 
  NEW 
  SERIES. 
  20 
  

  

  