﻿TR 
  EM 
  A 
  TODE 
  PA 
  lU 
  SITES 
  OF 
  FISHES— 
  L 
  INTOK. 
  531 
  

  

  testes 
  are 
  two, 
  elliptical, 
  situated 
  about 
  Ihe 
  middle 
  of 
  the 
  post-acetabu- 
  

   lar 
  region. 
  In 
  one 
  example 
  they 
  were 
  contiguous; 
  in 
  others 
  they 
  were 
  

   removed 
  from 
  each 
  other 
  by 
  a 
  space 
  a 
  little 
  less 
  than 
  the 
  length 
  of 
  a 
  

   single 
  testes. 
  In 
  the 
  inoro 
  mature 
  specimens 
  the 
  testes 
  are 
  remote. 
  

   The 
  testes 
  in 
  one 
  si)ecimen 
  measured 
  1.12 
  and 
  1.03 
  mm., 
  respectively, 
  

   and 
  the 
  ovarj^ 
  was 
  about 
  1 
  mm. 
  back 
  of 
  the 
  posterior 
  testis. 
  The 
  vas 
  

   deferens 
  and 
  seminal 
  receptacle 
  lie 
  in 
  voluminous 
  folds 
  behind 
  and 
  

   above 
  ventral 
  sucker. 
  The 
  uterus 
  is 
  verj^ 
  long 
  and 
  occupies 
  the 
  greater 
  

   part 
  of 
  the 
  body 
  from 
  the 
  ventral 
  sucker 
  nearly 
  to 
  the 
  posterior 
  end, 
  

   and 
  is 
  crowded 
  with 
  ova, 
  which 
  are 
  0.03 
  and 
  0.02 
  mm. 
  in 
  their 
  two 
  

   principal 
  diameters. 
  

  

  No-spines 
  of 
  any 
  kind 
  were 
  noticed 
  either 
  on 
  the 
  neck 
  or 
  on 
  the 
  ]ii)s 
  

   of 
  the 
  ventral 
  sucker. 
  Since 
  the 
  spines 
  of 
  D. 
  nig 
  roji 
  arum 
  are 
  said 
  to 
  be 
  

   deciduous, 
  this 
  is 
  a 
  difference 
  that 
  must 
  not 
  be 
  made 
  too 
  much 
  of. 
  The 
  

   specimens 
  were 
  of 
  various 
  lengths: 
  the 
  largest 
  measured 
  'So 
  mm. 
  in 
  

   length 
  and 
  1.12 
  in 
  diameter. 
  The 
  specimens 
  were 
  variously 
  contracted 
  

   and 
  distorted, 
  especially 
  about 
  the 
  anterior 
  end. 
  

  

  The 
  vitellaria 
  are 
  in 
  slender 
  thread-like 
  folds, 
  seen 
  in 
  transverse 
  

   sections 
  to 
  be 
  rather 
  centrally 
  situated, 
  except 
  where 
  crowded 
  to 
  one 
  

   side 
  by 
  the 
  testes. 
  They 
  are 
  reddish-brown, 
  in 
  sections 
  stained 
  with 
  

   borax 
  carmine, 
  and 
  lie 
  between 
  the 
  anterior 
  edge 
  of 
  the 
  o^■ary 
  and 
  the 
  

   ventral 
  sucker. 
  

  

  The 
  ovary, 
  in 
  sections, 
  is 
  seen 
  to 
  be 
  made 
  up 
  of 
  nucleated 
  cells 
  which 
  

   appear 
  to 
  be 
  polygonal, 
  usually 
  hexagonal, 
  especially 
  in 
  the 
  central 
  

   portions. 
  These 
  cells 
  are 
  about 
  0.017 
  mm. 
  in 
  diameter. 
  

  

  The 
  shell-gland 
  is 
  an 
  oval 
  body 
  lying 
  adjacent 
  to 
  the 
  front 
  edge 
  of 
  

   the 
  ovary 
  and 
  is 
  about 
  one-third 
  the 
  diameter 
  of 
  that 
  organ. 
  

  

  The 
  lumens 
  of 
  the 
  longitudinal 
  vessels, 
  especially 
  in 
  the 
  anterior 
  part 
  

   of 
  the 
  body, 
  are 
  tilled 
  with 
  a 
  fine 
  granular 
  substance, 
  brown 
  in 
  color, 
  

   and, 
  when 
  highly 
  magnified, 
  is 
  seen 
  to 
  have 
  minute 
  tetragonal 
  crystals 
  

   scattered 
  through 
  it. 
  On 
  accouni 
  of 
  the 
  irregular 
  contraction 
  of 
  the 
  

   body 
  and 
  of 
  the 
  vessels 
  themselves, 
  the 
  granular 
  contents 
  are 
  in 
  places 
  

   gathered 
  into 
  masses 
  of 
  considerable 
  relative 
  size. 
  Toward 
  the 
  pos- 
  

   terior 
  end 
  of 
  the 
  body 
  the 
  vessels, 
  in 
  all 
  individuals 
  sectioned, 
  were 
  

   empty. 
  Behind 
  the 
  ovary 
  the 
  body 
  is 
  largely 
  occupied 
  by 
  the 
  folds 
  of 
  

   the 
  uterus. 
  

  

  Certain 
  glandular 
  bodies, 
  which 
  lie 
  adjacentto 
  the 
  folds 
  of 
  the 
  seminal 
  

   receptacle 
  behind 
  the 
  ventral 
  sucker 
  (Fig. 
  11) 
  and 
  contain 
  numerous 
  

   nucleated 
  cells, 
  appear 
  to 
  be 
  continuous 
  with 
  the 
  prostatic 
  cells 
  which 
  

   surround 
  the 
  vas 
  deferens, 
  near 
  the 
  base 
  of 
  the 
  cirrus 
  i)ouch, 
  at 
  which 
  

   place 
  the 
  uterus 
  joins 
  the 
  vas 
  deferens. 
  These 
  organs 
  have 
  the 
  same 
  

   relative 
  arrangement 
  as 
  the 
  corresponding 
  organs 
  in 
  D. 
  macrocotyle. 
  

   (Plate 
  XLYI, 
  fig, 
  3.) 
  The 
  cirrus 
  is 
  relatively 
  larger 
  and 
  not 
  situated 
  so 
  

   close 
  to 
  the 
  oral 
  sucker; 
  and 
  the 
  seminal 
  recei)tacles 
  are 
  behind 
  instead 
  

   of 
  above 
  and 
  in 
  front 
  of 
  the 
  ventral 
  sucker. 
  

  

  Found 
  in 
  intestines 
  of 
  Mola 
  mola, 
  thirteen 
  specimens; 
  off' 
  Marthas 
  

   Vineyard, 
  September 
  10, 
  1886. 
  Collected 
  by 
  Vinal 
  K. 
  Edwards. 
  

  

  