﻿434 
  PBOCEEDTNOS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  fragments. 
  These 
  si)eciinens 
  resemble 
  the 
  larva 
  of 
  I), 
  cordiceps 
  from 
  

   the 
  Rocky 
  Moiintiiiii 
  trout 
  {Salnio 
  myl-is.s). 
  Upon 
  comparison 
  with 
  

   specimens 
  taken 
  from 
  tlie 
  abdominal 
  cavity 
  of 
  that 
  fish 
  tliey 
  appear 
  to 
  

   be 
  identical. 
  The 
  largest 
  fragments 
  were 
  something 
  over 
  30 
  mm. 
  in 
  

   length 
  and 
  li.5 
  in 
  greatest 
  breadth. 
  

  

  14. 
  DIBOTHRIUM 
  INFUNDIBULIFORME 
  Rudolphi. 
  

  

  (Plate 
  XXX, 
  figs. 
  3-6.) 
  

  

  Dihotlirium 
  infuncUhnllforme 
  Diesing, 
  Syst. 
  Helm., 
  I, 
  pp. 
  .590-591. 
  — 
  Willemoes- 
  

  

  SuiiM, 
  Zeitschr. 
  f. 
  w. 
  Zo("»l., 
  XXIII, 
  pi. 
  xvii, 
  fig. 
  10. 
  

   Bothriocf'phalus 
  hifiDidibuUformis 
  Et'DOLPiii, 
  Entoz., 
  II, 
  Pt. 
  2, 
  p. 
  46. 
  

   B. 
  2>rohoscifleus 
  Rudolphi, 
  Zscliokke, 
  Kechercbes, 
  pp. 
  21-25, 
  pi. 
  ix, 
  fig. 
  3. 
  

  

  Nos. 
  4744, 
  4710, 
  4709, 
  U.S.:N^.M. 
  I 
  have 
  identified 
  as 
  Dihothrimn 
  

   infundi 
  but 
  i 
  forme 
  three 
  lots 
  of 
  parasites, 
  one 
  from 
  the 
  ling 
  {Lota 
  maculosa) 
  

   and 
  the 
  others 
  from 
  the 
  Great 
  Lake 
  trout 
  {Cristiromer 
  namaycush). 
  

  

  1. 
  Two 
  specimens 
  from 
  Lota 
  m((cuJosa, 
  Sebago 
  Lake, 
  Maine, 
  January 
  

   7, 
  1887; 
  collected 
  by 
  Professor 
  L. 
  A. 
  Lee, 
  of 
  Bowdoin 
  College, 
  Bruns- 
  

   wick, 
  Maine. 
  No. 
  4744, 
  U.S.N.M. 
  Dimensions 
  of 
  one 
  of 
  the 
  speci- 
  

   mens: 
  Length, 
  109 
  mm.; 
  length 
  of 
  head, 
  0.9; 
  diameter 
  of 
  head, 
  

   marginal 
  view, 
  in 
  front, 
  0.35; 
  middle, 
  0.28; 
  base, 
  0.47; 
  distance 
  to 
  first 
  

   segment, 
  l.o; 
  length 
  of 
  first 
  segment, 
  0.37; 
  diameter 
  of 
  first 
  segment, 
  

   middle, 
  0.28; 
  breadth 
  of 
  ])osterior 
  segment,. 
  0.8; 
  length 
  of 
  posterior 
  

   segment 
  about 
  0.38; 
  no 
  mature 
  segments. 
  

  

  The 
  two 
  scolices, 
  as 
  well 
  as 
  the 
  anterior 
  portion 
  of 
  each 
  strobile, 
  j)re- 
  

   sent 
  considerable 
  differences, 
  which, 
  however, 
  appear 
  to 
  be 
  due 
  to 
  

   different 
  states 
  of 
  contraction. 
  In 
  one 
  the 
  fossettes 
  reach 
  the 
  extreme 
  

   anterior 
  border 
  of 
  the 
  head, 
  so 
  that 
  in 
  front 
  view 
  the 
  head 
  is 
  oblong, 
  

   with 
  very 
  deep 
  lateral 
  emarginations. 
  In 
  the 
  other 
  the 
  anterior 
  border 
  

   of 
  each 
  fossette 
  is 
  limited 
  by 
  an 
  overhanging 
  cushion. 
  One 
  is 
  consid- 
  

   erably 
  larger 
  than 
  the 
  other. 
  The 
  neck 
  in 
  the 
  larger 
  specimen 
  is 
  about 
  

   two-thirds 
  of 
  the 
  length 
  of 
  the 
  head 
  and 
  conical; 
  the 
  first 
  segments 
  

   longer 
  than 
  broad, 
  a 
  few 
  of 
  them 
  presenting 
  the 
  characteristic 
  funnel- 
  

   form 
  of 
  the 
  sijecies. 
  The 
  worm 
  throughout 
  is 
  narrow, 
  nowhere 
  becom- 
  

   ing 
  more 
  than 
  1 
  mm. 
  broad. 
  The 
  segments 
  are 
  somewhat 
  irregular 
  and 
  

   in 
  places 
  exhibit 
  a 
  grouping 
  together 
  noted 
  especially 
  in 
  D. 
  jnmctatmn. 
  

  

  2. 
  No. 
  4710, 
  U.S.N.M. 
  Label 
  reads 
  : 
  " 
  Intestinal 
  worms 
  SaJmo 
  

   amethystus; 
  Shoal 
  Island, 
  Lake 
  Superior, 
  Wisconsin; 
  J. 
  W. 
  Milner." 
  

  

  Specimens 
  too 
  much 
  broken 
  to 
  get 
  length, 
  evidently 
  long. 
  Heads 
  of 
  

   different 
  shapes 
  due 
  to 
  contraction.. 
  Length 
  of 
  head 
  about 
  1 
  mm. 
  In 
  

   most 
  cases 
  the 
  head 
  was 
  squarish, 
  truncate 
  in 
  front, 
  neck 
  short, 
  first 
  

   segments 
  distinct, 
  as 
  long 
  as 
  broad 
  and 
  funnel-form; 
  greatest 
  breadth 
  

   of 
  strobile 
  about 
  2 
  mm. 
  ; 
  segments 
  short 
  and 
  transversely 
  rugose, 
  with 
  

   a. 
  shallow 
  median, 
  longitudinal 
  sulcus. 
  Ova 
  0.06 
  and 
  0.032 
  mm. 
  in 
  two 
  

   principal 
  diameters. 
  

  

  3. 
  No. 
  4709, 
  U.S.N.M, 
  Label 
  reads: 
  ^^ 
  SaJmo 
  sisconet. 
  intestine; 
  

   Outer 
  Island, 
  Lake 
  Superior; 
  J. 
  W. 
  Milner." 
  

  

  