﻿448 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  35. 
  THYSANOCEPHALUM 
  CRISPUM 
  Linton. 
  

  

  I'lnjJluholhnum 
  thyHanocephuhtin 
  Lixton, 
  U. 
  S. 
  Fish 
  Com. 
  Rcpt., 
  1886, 
  pp. 
  4()4-4()8, 
  

  

  pi. 
  II, 
  figs. 
  1-12. 
  

   Thy 
  sanoceph 
  alum 
  cnspum 
  Linton, 
  IJ. 
  S. 
  Fish 
  Com. 
  Kept., 
  1887, 
  pp. 
  823-S24; 
  

  

  1888, 
  pp 
  543-556, 
  pis. 
  lxi-lxvii, 
  figs. 
  1-43. 
  

  

  ^o. 
  4732, 
  Tj.S.N.M. 
  This 
  species 
  lias 
  been 
  reiwrted 
  upon 
  in 
  a 
  

   special 
  paj)er, 
  cited 
  above. 
  It 
  was 
  found 
  on 
  two 
  occasions 
  m 
  the 
  sum- 
  

   mer 
  of 
  1889, 
  at 
  Woods 
  Holl, 
  Massachusetts, 
  in 
  the 
  intestine 
  of 
  the 
  tiger 
  

   shark 
  [OaJeoccrdo 
  HgrimiH). 
  I 
  have 
  examined 
  only 
  three 
  specimens 
  of 
  

   this 
  shark, 
  but 
  in 
  each 
  have 
  found 
  enormous 
  numbers 
  of 
  this 
  curious 
  

   cestod. 
  

  

  36. 
  RHYNCHOBOTHRIUM 
  BULBIFER 
  Linton. 
  

  

  RhyudiohotliriKin 
  iennicoUe 
  KuDOLPiii, 
  LiNTON, 
  V. 
  S."Fisli 
  Com. 
  Kept., 
  1886, 
  pp. 
  

  

  486-488, 
  pi. 
  V, 
  figs. 
  17, 
  18. 
  

   E. 
  bulbi/er 
  Linton, 
  U. 
  S. 
  Fish 
  Com. 
  Kept., 
  1887, 
  pp. 
  825-829, 
  pi. 
  x, 
  figs. 
  8, 
  9; 
  

  

  pi. 
  XI, 
  figs. 
  1, 
  2. 
  

  

  Kos. 
  4752, 
  4746, 
  U.S.K.M. 
  1 
  found 
  this 
  species 
  on 
  three 
  occasions 
  

   in 
  the 
  summer 
  of 
  1889, 
  Woods 
  Holl, 
  Massachusetts, 
  in 
  the 
  intestine 
  

   of 
  dogfish 
  {Miistehis 
  canis). 
  July 
  12, 
  a 
  few 
  specimens 
  in 
  each 
  of 
  two 
  

   dogfish; 
  -Tuly 
  18, 
  few 
  in 
  each 
  of 
  three 
  dogfish; 
  July 
  25, 
  few 
  in 
  one 
  

   dogfish. 
  

  

  This 
  species 
  is 
  usually 
  associated 
  with 
  the 
  smaller 
  B. 
  tumidulum 
  aiid 
  

   the 
  two 
  species 
  of 
  CaUiobothrii(m, 
  G. 
  terticiUatum 
  and 
  C. 
  eschrichtii. 
  

  

  .37. 
  RHYNCHOBOTHRIUM 
  TUMIDULUM 
  Linton. 
  

  

  Rlujnchohothr'uim 
  tnmUhihim 
  Linton, 
  U. 
  S. 
  Fish 
  Com. 
  Kept., 
  1887, 
  pp. 
  829-832, 
  

   pi. 
  XI, 
  figs. 
  3-11. 
  

  

  ^o. 
  4748, 
  IT.S.N".M. 
  This 
  si)ecies 
  was 
  discovered 
  on 
  three 
  occasions 
  

   in 
  the 
  summer 
  of 
  1889 
  in 
  intestine 
  of 
  the 
  dogfish 
  {Mustelus 
  cauis)', 
  

   Woods 
  Holl, 
  Massachusetts; 
  July 
  12, 
  a 
  few 
  from 
  each 
  of 
  two 
  dogfish; 
  

   July 
  18, 
  few 
  in 
  each 
  of 
  four 
  dogfish; 
  August 
  1, 
  a 
  few 
  in 
  three 
  of 
  four 
  

   dogfish. 
  

  

  This 
  species 
  is 
  usually 
  associated 
  in 
  the 
  dogfish 
  with 
  the 
  larger 
  

   R. 
  hulbosuni 
  and 
  two 
  species 
  of 
  CalUobothrmm., 
  C. 
  verUcillatiim 
  and 
  C. 
  

   eselirichtii. 
  

  

  A 
  Ehynohobothrium 
  which 
  I 
  found 
  in 
  the 
  intestine 
  of 
  the 
  sting 
  ray 
  

   {Basyatis 
  centrura) 
  at 
  Woods 
  Holl, 
  Massachusetts, 
  August 
  IG, 
  1889, 
  

   agrees 
  with 
  this 
  species. 
  

  

  38. 
  RHYNCHOBOTHRIUM 
  TENUISPINE 
  Linton. 
  

  

  (Plate 
  XXXI 
  V, 
  fig. 
  8.) 
  

  

  lihynchohothrium 
  teniuspine 
  Linton, 
  U. 
  S. 
  Fish 
  Com. 
  Kept., 
  1887, 
  jip. 
  837-838, 
  

   pi. 
  XII, 
  figs. 
  1, 
  2. 
  

  

  Nos. 
  4749, 
  4751, 
  U.S.iSr.M. 
  I 
  discovered 
  this 
  species 
  on 
  one 
  occa- 
  

   sion 
  in 
  the 
  sting 
  ray 
  {Dasyatis 
  ventrura), 
  intestine, 
  since 
  1887, 
  in 
  the 
  

   summer 
  of 
  1889; 
  July 
  18, 
  one 
  specimen, 
  

  

  I 
  have 
  also 
  found 
  a 
  Rhynchobothrium 
  in 
  the 
  spiral 
  valve 
  of 
  the 
  blue 
  

  

  