﻿528 
  PROCEEDINUS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  In 
  specimens 
  wliich 
  had 
  been 
  killed 
  in 
  corrosive 
  sublimate 
  and 
  pre- 
  

   served 
  in 
  alcohol, 
  the 
  embryos 
  were 
  found 
  to 
  be 
  surrounded 
  by 
  coagu- 
  

   lated 
  material, 
  which 
  easily 
  separated 
  from 
  them. 
  One 
  case 
  was 
  noticed 
  

   where 
  the 
  whole 
  cyst 
  had 
  degenerated 
  into 
  tough, 
  yellowish, 
  concentric 
  

   layers. 
  

  

  Two 
  capsules 
  (alcoholic) 
  measured 
  1.75 
  mm. 
  and 
  2,1 
  in 
  diameter, 
  

   respectively. 
  

  

  Body 
  subcylindrical; 
  neck 
  short; 
  densely 
  covered 
  with 
  short, 
  sub- 
  

   triangular 
  spines. 
  Oral 
  aperture 
  transverse, 
  somewhat 
  triangular, 
  

   surrounded 
  by 
  oblong, 
  stoutish 
  spines. 
  The 
  latter 
  are 
  somewhat 
  

   obscurely 
  arranged 
  in 
  two 
  rows; 
  this 
  is 
  most 
  evident 
  at 
  the 
  anterior 
  

   border. 
  Of 
  these 
  oral 
  spines 
  the 
  lateral 
  are 
  longest. 
  Their 
  number, 
  

   in 
  maturest 
  specimens, 
  is 
  about 
  thirty-four. 
  The 
  ventral 
  sucker 
  is 
  

   larger 
  than 
  the 
  oral; 
  the 
  pharynx 
  is 
  oblong 
  pyriform, 
  muscular, 
  nearer 
  

   ventral 
  tlian 
  oral 
  sucker; 
  the 
  branches 
  of 
  the 
  intestine 
  capacious. 
  

  

  The 
  following 
  measurements 
  were 
  made 
  of 
  an 
  alcoholic 
  specimen: 
  

   Length, 
  including 
  terminal 
  globular 
  sac, 
  2 
  mm. 
  ; 
  diameter 
  of 
  head, 
  0.38; 
  

   diameter 
  of 
  neck, 
  0.28; 
  diameter 
  at 
  ventral 
  sucker, 
  0,(10; 
  diameter 
  of 
  

   ventral 
  sucker, 
  0.30; 
  breadth 
  of 
  oral 
  ajterture, 
  0,19; 
  length 
  of 
  pharynx, 
  

   0.22; 
  breadth 
  of 
  pharynx, 
  O.IG; 
  length 
  of 
  longest 
  oral 
  spines, 
  0.10. 
  

   Transverse 
  sections 
  showed 
  a 
  cirrus 
  in 
  front 
  of 
  and 
  dorsal 
  to 
  ventral 
  

   sucker, 
  which 
  was 
  0.018 
  mm, 
  in 
  diameter 
  near 
  its 
  extremity, 
  and 
  appar- 
  

   ently 
  about 
  0.11 
  in 
  length. 
  In 
  sections, 
  maximum 
  diameter 
  of 
  ventral 
  

   sucker, 
  0.43; 
  other 
  diameters 
  of 
  same, 
  0.25; 
  diameter 
  of 
  oral 
  sucker, 
  0.26. 
  

  

  These 
  embryos 
  bear 
  much 
  reseml)lanceto 
  adult 
  Bisfoma 
  found 
  in 
  Boc- 
  

   cus 
  Hueatns, 
  />. 
  fenue, 
  and 
  may 
  indeed 
  be 
  identical. 
  

  

  Found 
  in 
  peritoneum 
  of 
  Alutera 
  schoepjii, 
  numerous; 
  Woods 
  Holl, 
  

   Massachusetts, 
  August 
  5, 
  1889, 
  

  

  T2. 
  DISTOMUM 
  CONTORTUM 
  Rudolphi, 
  

   (Plate 
  XLVIII, 
  tigs. 
  :j-7.) 
  

  

  Distominn 
  vontortaiii 
  Dujardin, 
  Hist. 
  Nat. 
  d. 
  Helm., 
  1845, 
  p. 
  469. 
  — 
  DiESiX(;, 
  8yst. 
  

   Hehn., 
  I, 
  1850, 
  p. 
  394; 
  Sitzuugsb, 
  Weiuer 
  Akad., 
  XXXII, 
  1858, 
  p. 
  353.— 
  

   CoBBOLD, 
  Synops, 
  Distom., 
  1859, 
  p. 
  29. 
  — 
  Olsson, 
  Lund's. 
  Univ. 
  Arsskritt, 
  

   IV, 
  1868, 
  p. 
  39, 
  pi. 
  V, 
  ligs. 
  104, 
  105; 
  Bidrag, 
  t. 
  Skaudin. 
  Helminthf., 
  1876, 
  

   p. 
  17,— 
  Carus, 
  Prodr. 
  Faunae 
  Mediteir., 
  I, 
  1884, 
  p, 
  126.— 
  Stossich, 
  Dist. 
  

   d. 
  Pesc, 
  1886, 
  p. 
  40.-Sonsin(), 
  Proc. 
  Verb. 
  d. 
  Soc, 
  Tosc. 
  d. 
  Sci. 
  Nat., 
  1890, 
  

   Yi. 
  3 
  (extract). 
  

  

  Twelve 
  specimens 
  in 
  the 
  United 
  States 
  National 
  JMuseum 
  collection 
  

   No, 
  4:848, 
  Name 
  of 
  host 
  not 
  given, 
  probably 
  Mola 
  mola. 
  The 
  label 
  

   in 
  the 
  bottle 
  reads: 
  "Station 
  !, 
  1880, 
  U. 
  S. 
  Fish 
  Commission.'' 
  

  

  1 
  do 
  not 
  find 
  any 
  mention 
  made 
  of 
  the 
  very 
  peculiar 
  spines 
  which 
  

   characterize 
  these 
  sj)ecimens 
  in 
  any 
  of 
  the 
  descriptions 
  of 
  D. 
  contortum 
  

   which 
  I 
  have 
  read. 
  For 
  this 
  reason 
  alone 
  I 
  am 
  in 
  some 
  doubt 
  as 
  to 
  

   whether 
  they 
  should 
  be 
  identified 
  as 
  I), 
  contortum 
  or 
  referred 
  to 
  a 
  

   new 
  species. 
  

  

  Tlip 
  twelve 
  specimens 
  were 
  felted 
  together 
  in 
  a 
  single 
  mass, 
  the 
  indi- 
  

  

  