﻿572 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  AIUSEUM 
  vol. 
  los 
  

  

  eosinophilous 
  granulations. 
  The 
  organ 
  has 
  the 
  form 
  of 
  a 
  long 
  tubular 
  

   gland 
  whose 
  lumen 
  is 
  filled 
  with 
  eosinophilous 
  secretion. 
  At 
  about 
  

   the 
  middle 
  of 
  the 
  gland 
  are 
  found 
  lateral 
  outpocketings, 
  and 
  from 
  

   this 
  point 
  posteriorly 
  there 
  are 
  seen 
  to 
  either 
  side 
  of 
  the 
  gland 
  the 
  

   long-necked 
  eosinophilous 
  glands 
  that 
  furnish 
  the 
  secretion. 
  They 
  

   appear 
  as 
  darkly 
  stained 
  pyriform 
  bodies. 
  At 
  the 
  posterior 
  end 
  of 
  the 
  

   gland 
  a 
  retractor 
  muscle 
  extends 
  posteriorly, 
  joining 
  the 
  muscle 
  

   layer 
  of 
  the 
  ventral 
  body 
  wall, 
  and 
  a 
  thicker 
  and 
  more 
  prominent 
  

   protractor 
  muscle 
  curves 
  dorsally 
  and 
  anteriorly 
  to 
  insert 
  on 
  the 
  dorsal 
  

   body 
  wall. 
  The 
  presence 
  of 
  a 
  protractor 
  muscle 
  indicates 
  that 
  the 
  

   gland 
  can 
  be 
  everted 
  to 
  some 
  extent, 
  probably 
  as 
  far 
  as 
  the 
  lateral 
  

   pouches. 
  The 
  eosinophilous 
  secretion 
  is 
  of 
  an 
  adhesive 
  nature 
  and 
  

   it 
  is 
  generally 
  supposed 
  that 
  the 
  adhesive 
  organ 
  functions 
  in 
  the 
  

   capture 
  of 
  prey 
  as 
  well 
  as 
  in 
  leechlike 
  crawling. 
  

  

  Reproductive 
  system. 
  — 
  The 
  gonads 
  could 
  not 
  be 
  seen 
  in 
  whole 
  speci- 
  

   mens 
  but 
  were 
  found 
  in 
  the 
  sections 
  and 
  have 
  been 
  entered 
  on 
  figure 
  

   66,a. 
  The 
  pair 
  of 
  ovaries 
  occurs 
  in 
  the 
  usual 
  site. 
  The 
  testes 
  form 
  

   a 
  tract 
  on 
  either 
  side 
  anterior 
  to 
  the 
  pharynx. 
  They 
  are 
  rather 
  large 
  

   and 
  fill 
  the 
  middle 
  region 
  of 
  the 
  sections. 
  The 
  copulatory 
  apparatus 
  

   was 
  in 
  poor 
  condition 
  in 
  both 
  sets 
  of 
  sagittal 
  sections 
  that 
  were 
  pre- 
  

   pared. 
  The 
  copulatory 
  bursa 
  was 
  made 
  out 
  with 
  great 
  difficulty 
  

   and 
  the 
  dorsal 
  wall 
  above 
  the 
  vagina 
  was 
  badly 
  broken 
  in 
  both 
  series. 
  

   A 
  sagittal 
  view 
  of 
  the 
  copulatory 
  apparatus 
  as 
  constructed 
  by 
  study 
  

   of 
  the 
  two 
  series 
  of 
  sections 
  is 
  given 
  in 
  figure 
  68. 
  The 
  penis 
  is 
  a 
  con- 
  

   spicuous 
  object 
  behind 
  the 
  pharynx 
  in 
  the 
  whole 
  worm 
  (fig. 
  66, 
  a) 
  

   but 
  as 
  the 
  penis 
  bulb 
  appears 
  somewhat 
  curved 
  its 
  full 
  extent 
  is 
  not 
  

   evident 
  in 
  any 
  one 
  section. 
  There 
  seems 
  to 
  be 
  an 
  unusuaU}^ 
  large 
  and 
  

   muscular 
  penis 
  bulb 
  formed 
  of 
  muscle 
  fibers 
  paralleling 
  its 
  contours 
  

   and 
  penetrated 
  by 
  the 
  two 
  narrow 
  sperm 
  ducts 
  (fig. 
  68) 
  . 
  At 
  the 
  base 
  

   of 
  the 
  penis 
  papilla 
  these 
  join 
  to 
  a 
  narrow 
  ejaculatorj^ 
  duct 
  that 
  soon 
  

   widens 
  as 
  it 
  traverses 
  the 
  penis 
  papilla, 
  narrowing 
  again 
  towards 
  the 
  

   tip 
  of 
  the 
  latter. 
  The 
  penis 
  papilla 
  is 
  of 
  elongated 
  conical 
  form 
  and 
  

   rather 
  muscular. 
  It 
  presents 
  the 
  peculiarity 
  of 
  a 
  layer 
  of 
  cyanophilous 
  

   gland 
  cells 
  outside 
  the 
  lining 
  epithelium 
  of 
  the 
  ejaculatory 
  duct 
  along 
  

   the 
  distal 
  part 
  of 
  the 
  latter. 
  The 
  penis 
  bulb 
  lies 
  within 
  a 
  male 
  antrum 
  

   that 
  follows 
  its 
  contours. 
  As 
  already 
  indicated, 
  the 
  female 
  apparatus 
  

   was 
  in 
  poor 
  condition 
  in 
  the 
  available 
  material. 
  The 
  copulatory 
  

   bursa 
  was 
  much 
  damaged 
  but 
  appeared 
  as 
  indicated 
  in 
  figure 
  68 
  as 
  a 
  

   flattened 
  sac 
  with 
  a 
  low 
  epithelial 
  lining 
  in 
  its 
  anterior 
  half, 
  a 
  tall 
  

   lining 
  posteriorly 
  where 
  the 
  bursa 
  passes 
  into 
  its 
  canal. 
  The 
  latter 
  

   is 
  a 
  long, 
  slender 
  duct 
  proceeding 
  posteriorly 
  above 
  the 
  male 
  antrum. 
  

   After 
  reaching 
  a 
  point 
  behind 
  the 
  level 
  of 
  the 
  gonopore, 
  the 
  bursal 
  

   canal 
  turns 
  abruptly 
  ventrally 
  and 
  enters 
  a 
  conspicuous, 
  rounded 
  

   vagina 
  that 
  was 
  very 
  evident 
  in 
  the 
  whole 
  specimens 
  (fig. 
  66, 
  a). 
  

  

  