﻿CESTODE 
  PARASITES 
  OF 
  FISHES— 
  LIXTOX. 
  447 
  

  

  32. 
  CALLIOBOTHRIUM 
  ESCHRICHTII 
  Beneden. 
  

  

  Calliubofhriiim 
  esrhrichtii 
  Henedkx, 
  Lintox, 
  U. 
  S. 
  Fish 
  Com. 
  Kept., 
  1887, 
  pji. 
  

   812-816. 
  pi. 
  VII, 
  figs. 
  5-12. 
  

  

  Nos. 
  4777, 
  4779, 
  U.S.N.M. 
  Three 
  lots 
  of 
  this 
  worm 
  liave 
  been 
  col- 
  

   lected 
  since 
  tbe 
  report 
  for 
  1887 
  was 
  made, 
  all 
  iu 
  the 
  summer 
  of 
  1889; 
  

   Woods 
  Holl, 
  Massacliusetts, 
  from 
  tbe 
  dogfish 
  {Mustelus 
  canis). 
  July 
  

   12, 
  a 
  small 
  uumber 
  of 
  specimens 
  from 
  each 
  of 
  two 
  dogfish; 
  July 
  18, 
  

   few 
  specimens 
  from 
  each 
  of 
  four 
  dogfish; 
  August 
  1, 
  few 
  specimens 
  

   from 
  three 
  of 
  four 
  dogfish. 
  

  

  In 
  nearly 
  every 
  case 
  they 
  were 
  associated 
  with 
  C. 
  rertieeUatum, 
  Rhi/n- 
  

   chohothrlKm 
  hulbosum, 
  and 
  B. 
  tnmidulum. 
  

  

  33. 
  CALLIOBOTHRIUM 
  VERTICILLATUM 
  Rudolphi. 
  

   (Plate 
  XXXIV, 
  figs. 
  G, 
  7.) 
  

  

  CaUiohothr'mm 
  vtrticiUainm 
  Rudolphi, 
  Lixton, 
  U. 
  S. 
  Fish 
  Com. 
  Rept., 
  1886, 
  pp. 
  

   476-479, 
  pi. 
  IV, 
  figs. 
  1-8; 
  1887, 
  pp. 
  810-812. 
  

  

  ISo. 
  4778, 
  U.S.ISr.M. 
  The 
  following 
  discoveries 
  of 
  this 
  species 
  were 
  

   made 
  iu 
  the 
  summer 
  of 
  1889 
  at 
  Woods 
  Holl, 
  Massachusetts; 
  all 
  from 
  

   intestine 
  of 
  the 
  dogfish 
  {MusteluH 
  canis). 
  July 
  12, 
  a 
  small 
  number 
  of 
  

   specimens 
  in 
  each 
  of 
  two 
  dogfish; 
  July 
  18, 
  a 
  few 
  si)ecimens 
  in 
  each 
  of 
  

   four 
  dogfish; 
  July 
  22, 
  a 
  few 
  specimens 
  in 
  each 
  of 
  two 
  dogfish; 
  July 
  25, 
  

   a 
  good 
  many, 
  large, 
  in 
  one 
  dogfish; 
  August 
  1, 
  many 
  specimens 
  in 
  three 
  

   of 
  four 
  dogfish. 
  

  

  Usually 
  associated 
  with 
  Ceschrichtii, 
  Ehynchobothri 
  tim 
  bulbosion^aud 
  

   R. 
  tumidnhini, 
  but, 
  as 
  a 
  rule, 
  I 
  have 
  found 
  it 
  more 
  abundant 
  than 
  its 
  

   associates, 
  and 
  more 
  likely 
  to 
  occur 
  in 
  this, 
  its 
  apparently 
  peculiar 
  host. 
  

  

  Some 
  proglottides 
  belonging 
  to 
  those 
  collected 
  August 
  1 
  were 
  left 
  in 
  

   sea 
  water 
  over 
  night. 
  On 
  the 
  following 
  morning 
  masses 
  of 
  ova 
  were 
  

   found 
  in 
  the 
  water, 
  inclosed 
  in 
  what 
  appeared 
  to 
  be 
  portions 
  of 
  the 
  

   uterus 
  (Fig. 
  6). 
  Many 
  of 
  these 
  ova 
  had 
  begun 
  to 
  undergo 
  segmen- 
  

   tation. 
  In 
  some 
  the 
  embryonic 
  spines 
  had 
  made 
  their 
  appearance, 
  

   although 
  the 
  exact 
  number 
  could 
  not 
  be 
  made 
  out 
  with, 
  certainty 
  in 
  any 
  

   case. 
  

  

  34. 
  PHOREIOBOTHRIUM 
  LASIUM 
  Linton. 
  

  

  Phoreiohothrium 
  lasium 
  Linton, 
  U. 
  S. 
  Fish 
  Com. 
  Rept., 
  1886, 
  pp. 
  474-476, 
  pi. 
  l^', 
  

   figs. 
  24-29; 
  1887, 
  pp. 
  819-820. 
  

  

  l!^o. 
  4800, 
  U.S.N.M. 
  One 
  specimen 
  was 
  found 
  associated 
  with 
  numer- 
  

   ous 
  examples 
  of 
  the 
  species 
  Oryf/mabothrinm 
  a)ignsti(m, 
  from 
  the 
  intes- 
  

   tine 
  of 
  the 
  blue 
  shark 
  {Prionace 
  glauea); 
  Woods 
  Holl, 
  Massachusetts, 
  

   August 
  5, 
  1889. 
  

  

  This 
  species 
  was 
  originally 
  described 
  from 
  specimens 
  found 
  in 
  Car- 
  

   char 
  inns 
  obscurus. 
  

  

  