﻿NO. 
  1125. 
  CESTODE 
  PARASITES 
  OF 
  FISHES-LINTOX. 
  443 
  

  

  26. 
  PHYLLOBOTHRIUM 
  FOLIATUM 
  Linton. 
  

  

  (Plate 
  XXXIII, 
  fig. 
  6.) 
  

  

  PhijUohothrinm 
  foliatiim 
  Linton, 
  U. 
  S. 
  Fish 
  Com. 
  Kept., 
  1887, 
  pp. 
  787-794, 
  pi. 
  

   \'i, 
  figs. 
  5-10. 
  

  

  Nos. 
  4733, 
  4840, 
  U.S.X.M. 
  The 
  following 
  additioual 
  discoveries 
  of 
  

   this 
  parasite 
  are 
  here 
  recorded; 
  all 
  collected 
  at 
  Woods 
  Holl, 
  Massa- 
  

   chusetts, 
  from 
  the 
  spiral 
  intestine 
  of 
  the 
  sting- 
  ray 
  {Dasyatis 
  centrura), 
  

   in 
  the 
  summer 
  of 
  1889. 
  

  

  July 
  24, 
  one 
  specimen, 
  one 
  ray 
  examined; 
  August 
  9, 
  several 
  speci- 
  

   mens, 
  m 
  eacli 
  of 
  two 
  rays 
  examined 
  ; 
  August 
  14, 
  three 
  specimens, 
  small, 
  

   from 
  one 
  ray 
  examined; 
  August 
  10, 
  two 
  specimens, 
  from 
  one 
  ray 
  

   examined. 
  

  

  One 
  of 
  the 
  rays 
  examined 
  on 
  August 
  9 
  bad 
  begun 
  to 
  decompose 
  

   slightl}', 
  there 
  being 
  a 
  strong 
  ammoniacal 
  odor 
  given 
  off 
  from 
  the 
  

   intestine. 
  In 
  this 
  intestine 
  the 
  worms 
  were 
  exceedingly 
  attenuate, 
  

   as 
  much 
  as 
  200 
  mm. 
  in 
  length, 
  and 
  riliform; 
  they 
  were 
  dead, 
  and 
  I 
  infer 
  

   that 
  the 
  attenuate, 
  filiform 
  conditiini 
  represents 
  a 
  post 
  mortem 
  change. 
  

   The 
  worms 
  from 
  the 
  other, 
  slightly 
  fresher 
  intestine 
  were 
  normal 
  in 
  

   shape, 
  and 
  when 
  placed 
  in 
  sea 
  water 
  were 
  moderately 
  active. 
  

  

  Fig. 
  represents 
  a 
  segment 
  which 
  was 
  free 
  when 
  collected 
  and 
  

   which 
  appears 
  to 
  belong 
  to 
  this 
  species. 
  It 
  was 
  observed 
  after 
  the 
  free 
  

   proglottides 
  had 
  lain 
  in 
  sea 
  water 
  for 
  some 
  twelve 
  hours 
  that 
  a 
  large 
  

   mass 
  of 
  ova 
  had 
  been 
  discharged 
  from 
  one 
  or 
  more 
  of 
  them 
  and 
  was 
  

   l^ing 
  spread 
  oat 
  on 
  the 
  bottom 
  of 
  the 
  dish. 
  The 
  mass 
  adhered 
  so 
  

   tiglitly 
  to 
  the 
  glass 
  that 
  it 
  could 
  not 
  be 
  removed 
  by 
  the 
  suction 
  of 
  a 
  

   pil)ette; 
  when 
  gently 
  separated 
  from 
  the 
  dish 
  the 
  ova 
  were 
  fouTid 
  to 
  

   be 
  held 
  together 
  by 
  a 
  mucilaginous 
  substance. 
  The 
  adhesive 
  material 
  

   appears 
  to 
  be 
  soluble 
  in 
  alcohol. 
  The 
  ova, 
  at 
  least 
  many 
  of 
  them, 
  were 
  

   collapsed 
  on 
  one 
  side, 
  boat-shaped; 
  0.038 
  and 
  0.024 
  mm. 
  in 
  the 
  two 
  

   principal 
  diameters. 
  

  

  27. 
  ORYGMATOBOTHRIUM 
  ANGUSTUM 
  Linton. 
  

  

  Onjgmatohothri 
  i( 
  in 
  unguatam 
  Linton, 
  U. 
  S. 
  Fish 
  Com. 
  Kept., 
  1886, 
  p}). 
  468-469, 
  

   pi. 
  in, 
  figs. 
  1-3; 
  1887, 
  pp. 
  796-799. 
  pi. 
  vii, 
  fig. 
  3. 
  

  

  Xo. 
  4796, 
  IT.S.X.M. 
  Numerous 
  examples 
  of 
  this 
  species 
  were 
  found 
  

   in 
  the 
  intestine 
  of 
  the 
  blue 
  shark 
  {Prionace 
  glauca); 
  Woods 
  Holl, 
  Mas- 
  

   sachusetts, 
  August 
  a, 
  1889, 
  

  

  Altliougli 
  lam 
  not 
  satistied 
  with 
  this 
  disposition 
  of 
  thesjiecies, 
  and 
  am 
  

   convinced 
  that 
  when 
  the 
  much 
  needed 
  revision 
  of 
  the 
  Tetrabothriid» 
  

   is 
  made, 
  0. 
  angusUun 
  Linton 
  must 
  take 
  the 
  place 
  of 
  a 
  synonymn, 
  I 
  

   have 
  retained 
  the 
  name 
  which 
  1 
  have 
  used 
  in 
  jirevious 
  papers, 
  in 
  order 
  

   to 
  avoid 
  confusion. 
  

  

  