﻿NO. 
  1125. 
  CESTODE 
  riBAl^ITES 
  OF 
  FISHES— 
  LINTOX. 
  439 
  

  

  T 
  follow 
  Doimaclieu's 
  suggestion 
  and 
  Zscbokke's 
  example 
  in 
  refer- 
  

   ring 
  the 
  genus 
  Lujida 
  (larva) 
  to 
  the 
  genus 
  Dihothrium. 
  There 
  have 
  

   been 
  numerous 
  species 
  of 
  Lujnla 
  described, 
  but 
  the 
  distinctive 
  charac- 
  

   ters 
  of 
  the 
  species 
  rest, 
  in 
  many 
  cases 
  certainly, 
  merely 
  upon 
  the 
  dif- 
  

   ference 
  of 
  habitat 
  and 
  the 
  dimensions 
  of 
  the 
  body 
  of 
  the 
  worm. 
  I 
  do 
  

   not 
  see 
  anything 
  in 
  the 
  above 
  example 
  to 
  lead 
  me 
  to 
  think 
  that 
  they 
  

   would 
  develop 
  into 
  more 
  than 
  one 
  dilierent 
  species 
  of 
  worm. 
  The 
  fact 
  

   established 
  by 
  the 
  interesting 
  experiments 
  of 
  Donnadien 
  i\\i\t 
  LifjuUt 
  

   is 
  the 
  larval 
  stage 
  of 
  a 
  worm 
  living 
  in 
  the 
  adult 
  stage 
  in 
  the 
  intestine 
  

   of 
  different 
  aquatic 
  birds 
  accounts 
  for 
  the 
  very 
  wide 
  distribution 
  of 
  

   this 
  species. 
  

  

  18. 
  DIBOTHRIUM 
  species; 
  larva, 
  

  

  ^o. 
  4792, 
  U.S.N.M. 
  From 
  peritoneum 
  of 
  squeteague 
  {Gynoscion 
  

   regalis); 
  AVoods 
  Holl, 
  Massachusetts, 
  July 
  2(3, 
  1889. 
  

  

  Length 
  of 
  living 
  specimen 
  about 
  15 
  mm. 
  ; 
  breadth, 
  2.1; 
  of 
  nearlj^ 
  

   uniform 
  breadth 
  and 
  narrowed 
  about 
  equally 
  at 
  each 
  end: 
  posterior 
  

   end 
  with 
  terminal 
  pore; 
  body 
  crossed 
  with 
  line 
  wrinkles. 
  

  

  19. 
  ANTHOBOTHRIUM 
  LACINIATUM 
  Linton. 
  

  

  Anthobothrium 
  laciuiatttm 
  LiNTOX, 
  U. 
  8. 
  Fish 
  Com. 
  Kept., 
  1887, 
  pp. 
  754-759, 
  jil. 
  in, 
  

   f\>^s. 
  10-13; 
  pi. 
  IV, 
  tigs. 
  1-3. 
  

  

  Xo. 
  1770, 
  U.S.IS".M. 
  From 
  the 
  intestine 
  of 
  the 
  blue 
  shark 
  {Prionace 
  

   ghmca); 
  Woods 
  Holl, 
  Massachusetts, 
  August 
  5, 
  1889, 
  few; 
  numerous 
  

   free, 
  mature 
  proglottides, 
  measuring 
  as 
  much 
  as 
  3.5.mm. 
  in 
  length 
  and 
  

   I.-") 
  in 
  breadth 
  : 
  one 
  proglottis 
  somewhat 
  distorted, 
  was 
  1.5 
  mm. 
  long 
  and 
  

   1 
  broad. 
  

  

  Dimensions 
  of 
  scolices 
  and 
  strobiles 
  generally 
  not 
  materially 
  different 
  

   than 
  those 
  given 
  in 
  original 
  description 
  of 
  specimens 
  from 
  C. 
  ohscurHS. 
  

  

  20 
  ANTHOBOTHRIUM 
  PULVINATUM 
  Linton. 
  

  

  (Plate 
  XXXIII, 
  fig. 
  1.) 
  

  

  Antli()l)otliriiuii 
  2)iilruu(iii»i 
  LiNTOX, 
  IT. 
  S. 
  Fish 
  Com. 
  Rept., 
  1887, 
  ]>p. 
  759-765, 
  jil. 
  iv, 
  

   figs. 
  4-9; 
  pi. 
  V, 
  figs. 
  1,2. 
  

  

  In 
  the 
  summer 
  of 
  1889 
  I 
  found 
  this 
  worm 
  on 
  two 
  occasions 
  in 
  the 
  

   sting 
  ray 
  {Dfisyatis 
  centrnra) 
  ; 
  Woods 
  Holl, 
  Massachusetts, 
  July 
  18, 
  one 
  

   specimen, 
  length, 
  135 
  mm.; 
  greatest 
  breadth, 
  C. 
  August 
  14, 
  two 
  speci- 
  

   mens, 
  length 
  of 
  longest 
  200 
  mm. 
  The 
  si^ecimen 
  collected 
  on 
  July 
  18 
  

   was 
  slender 
  for 
  the 
  first 
  third 
  of 
  the 
  entire 
  length 
  with 
  nearly 
  uniform 
  

   diameter 
  of 
  1.75 
  mm. 
  It 
  then 
  thickened 
  rapidly, 
  reaching 
  a 
  maximum 
  

   breadth 
  of 
  0, 
  whence 
  it 
  narrowed 
  again 
  gradually 
  to 
  the 
  x)Osterior 
  end, 
  

   where 
  it 
  was 
  2 
  broad. 
  The 
  thickness 
  of 
  the 
  body 
  throughout 
  was 
  

   about 
  2 
  mm. 
  The 
  thick 
  part 
  of 
  the 
  body 
  was 
  flesh 
  color, 
  the 
  anterior 
  

   slender 
  part 
  pale 
  olive. 
  Body 
  crossed 
  by 
  tine 
  transverse 
  lines, 
  i. 
  e., 
  seg- 
  

   ments 
  in 
  middle 
  of 
  body 
  exceedingly 
  short; 
  segments 
  near 
  posterior 
  

   end 
  of 
  body 
  only 
  about 
  0.2 
  mm. 
  in 
  length 
  ; 
  length 
  of 
  last 
  segment, 
  1.5. 
  

  

  The 
  specimens 
  collected 
  on 
  August 
  11 
  had 
  heads 
  and 
  necks 
  white 
  

   and 
  translucent, 
  body 
  thick, 
  opatpie, 
  pale 
  reddish-brown, 
  or 
  flesh 
  color. 
  

  

  