﻿514 
  PlKK'EEDiydS 
  OF 
  THE 
  NATIONAL 
  MFSEUM. 
  

  

  Leugtli 
  up 
  to 
  15 
  mm. 
  [RudolphiJ. 
  Anterior 
  part 
  cylindrical, 
  obtuse 
  in 
  

   front 
  truncated 
  behind 
  where 
  an 
  ap])endage 
  with 
  irregular, 
  sometimes 
  

   almost 
  moniliform 
  outline 
  is 
  protruded 
  or 
  retracted 
  by 
  invagination. 
  

   The 
  anterior 
  sucker 
  is 
  directed 
  downward; 
  the 
  ventral 
  sucker 
  is 
  glob- 
  

   ular 
  and 
  prominent. 
  The 
  distance 
  between 
  the 
  suckers 
  may 
  be 
  but 
  lit- 
  

   tle 
  more 
  than 
  the 
  diameter 
  of 
  tlie 
  ventral 
  sucker. 
  Space 
  between 
  the 
  

   suckers 
  much 
  swollen 
  in 
  the 
  vicinity 
  of 
  the 
  genital 
  orifices. 
  The 
  recep- 
  

   tacle 
  of 
  the 
  cirrus 
  ends 
  in 
  a 
  muscular 
  sheath 
  which 
  is 
  thickened 
  and 
  

   transversely 
  striated. 
  Testes 
  globuhir, 
  situated 
  in 
  front 
  of 
  tbe 
  folds 
  of 
  

   the 
  oviduct; 
  ova 
  very 
  small 
  and 
  elliptical. 
  No. 
  4868, 
  LT.S.iST.M. 
  

  

  The 
  above 
  description, 
  witli 
  which 
  my 
  specimens 
  agree, 
  is 
  adapted 
  

   from 
  Dujardin. 
  

  

  Two 
  individuals 
  were 
  obtained 
  from 
  the 
  peritoneum 
  of 
  Voryphivna 
  

   liippums^ 
  13.75 
  mm. 
  and 
  8 
  in 
  length, 
  respectively. 
  The 
  oral 
  sucker 
  of 
  

   the 
  larger 
  was 
  0.50 
  in 
  diameter; 
  the 
  ventral 
  sucker 
  of 
  the 
  same 
  was 
  0.65 
  

   in 
  diameter, 
  somewhat 
  distorted 
  by 
  compression. 
  Longer 
  diameter 
  of 
  

   ova, 
  0.022; 
  shorter 
  diiimeter, 
  0,014. 
  

  

  The 
  ova 
  in 
  the 
  preserved 
  specimens 
  are 
  amber 
  yellow; 
  in 
  the 
  fresh 
  

   specimens 
  they 
  appear 
  greenish, 
  the 
  vitellaria 
  were 
  brown 
  while 
  the 
  gen- 
  

   eral 
  color 
  of 
  the 
  worm 
  was 
  whitish. 
  

  

  Found 
  in 
  CoryplKvna 
  hipiyurus, 
  Gulf 
  Stream, 
  August 
  13, 
  1885. 
  

  

  Among 
  the 
  ]!fational 
  Museum 
  entozoa 
  sent 
  to 
  me 
  for 
  identification 
  is 
  

   a 
  lot 
  of 
  distoma 
  belonging 
  to 
  D. 
  tornatum: 
  also 
  from 
  the 
  dolphin 
  [Cory 
  

   pluvna 
  hippurus). 
  No. 
  4868, 
  U.S.N.M. 
  These 
  were 
  collected 
  in 
  1883, 
  

   by 
  the 
  United 
  States 
  Fisli 
  Commission 
  steamer 
  Albatross. 
  

  

  The 
  longest 
  of 
  these 
  specimens 
  measured 
  9.5 
  mm., 
  the 
  shortest, 
  3.25 
  

   in 
  length. 
  Diameter 
  of 
  anterior 
  sucker 
  in 
  one 
  of 
  largest 
  specimens. 
  0.3 
  ; 
  

   of 
  ventral 
  sucker, 
  0.5; 
  length 
  of 
  pharynx, 
  0.15; 
  and 
  greatest 
  diameter 
  of 
  

   body, 
  at- 
  ventral 
  sucker, 
  0.7. 
  Long 
  diameter 
  of 
  ova, 
  0.02 
  ; 
  short 
  diame- 
  

   ter, 
  0.01. 
  The 
  body 
  is 
  transversely 
  wrinkled, 
  producing 
  a 
  serrate 
  out- 
  

   line, 
  best 
  seen 
  on 
  dorsal 
  surface. 
  The 
  cirrus, 
  which 
  was 
  retracted 
  in 
  

   all 
  my 
  specimens, 
  was 
  seen, 
  in 
  sections, 
  to 
  be 
  covered 
  with 
  minute 
  

   papillne. 
  This 
  agrees 
  with 
  description 
  of 
  I), 
  tornatum 
  given 
  by 
  Stossich. 
  

  

  9. 
  DISTOMUM 
  OCREATUM 
  Molin. 
  

   (Plate 
  XLII, 
  fig. 
  13.) 
  

  

  Distomum 
  ocrmtum 
  Olsson, 
  Liiud's 
  Uuiv. 
  Arsskrift, 
  lY, 
  p. 
  48, 
  ]>!. 
  v, 
  figs. 
  90-98. 
  — 
  

   Stossich, 
  Dist. 
  d. 
  Peso., 
  p. 
  12. 
  

  

  A 
  single 
  specimen, 
  described 
  below, 
  agrees 
  closely 
  with 
  Olsson's 
  fig- 
  

   ures 
  and 
  description 
  of 
  D. 
  ocrcatum 
  Molin, 
  which 
  species 
  he, 
  as 
  I 
  under- 
  

   stand 
  him, 
  regards 
  as 
  a 
  different 
  species 
  from 
  I>. 
  ocreatum 
  Rudolphi. 
  

   The 
  specimen 
  does 
  not 
  agree 
  with 
  Monticelli's 
  figures 
  of 
  Apoblenia 
  ocre- 
  

   atum 
  Rudolphi,' 
  nor 
  with 
  Molin's 
  figures 
  of 
  D. 
  ocreatum 
  Rudolphi.' 
  

   Von 
  Linstow 
  ' 
  refers 
  J), 
  ocreatum 
  to 
  J), 
  ventricosum. 
  

  

  'Acad. 
  Sci. 
  Torino, 
  XXVI, 
  1891. 
  

  

  ^Denksclir. 
  Wieu, 
  Akad., 
  XIX, 
  1861, 
  p. 
  209, 
  pi. 
  iii, 
  lig. 
  7. 
  

  

  sCompeiid., 
  p. 
  269. 
  

  

  