﻿30 
  Mr. 
  F. 
  E. 
  Beddard 
  on 
  the 
  

  

  II. 
  — 
  On 
  the 
  Osteology, 
  Pteryiosis, 
  and 
  Muscular 
  Anatomy 
  

   of 
  the 
  American 
  Fin-foot 
  (Heliornis 
  surinamensis). 
  By 
  

   Frank 
  E. 
  Beddard, 
  M.A.^ 
  F.R.S., 
  Prosector 
  to 
  the 
  Zoo- 
  

   logical 
  Society 
  of 
  London, 
  Examiner 
  in 
  Biology 
  to 
  the 
  

   Royal 
  College 
  of 
  Surgeons. 
  

  

  The 
  Heliornithidse, 
  comprising 
  the 
  two 
  genera 
  Heliornis 
  and 
  

   Podica, 
  have 
  been 
  investigated 
  anatomically 
  by 
  Brandt;^, 
  

   Nitzschf; 
  Giebel 
  J, 
  Gado\v§, 
  and 
  myself 
  1|. 
  The 
  affinities 
  of 
  

   these 
  birds 
  have 
  been 
  furthermore 
  discussed 
  by 
  Fiirbringer^. 
  

   The 
  American 
  Fin-foot, 
  Heliornis, 
  is 
  at 
  present 
  less 
  well 
  known 
  

   than 
  the 
  African 
  form. 
  Nitzsch 
  has 
  described 
  its 
  pteryiosis, 
  

   Giebel 
  gave 
  a 
  few 
  brief 
  notes 
  upon 
  the 
  muscular 
  anatomy, 
  

   while 
  Gadow 
  has 
  investigated 
  the 
  intestinal 
  coils. 
  Having 
  

   had 
  the 
  opportunity 
  two 
  years 
  ago 
  of 
  examining 
  and 
  reporting 
  

   upon 
  the 
  structure 
  of 
  the 
  African 
  Fin-foot, 
  I 
  am 
  particularly 
  

   glad 
  to 
  be 
  able 
  now 
  to 
  supplement 
  that 
  paper 
  by 
  some 
  account 
  

   of 
  the 
  American 
  Fin-foot. 
  The 
  material 
  upon 
  which 
  the 
  

   present 
  paper 
  is 
  based 
  I 
  owe 
  immediately 
  to 
  the 
  kindness 
  of 
  

   Mr. 
  Sclater, 
  and 
  more 
  indirectly 
  to 
  that 
  of 
  Mr. 
  J. 
  J. 
  Quelch, 
  

   the 
  Superintendent 
  of 
  the 
  Museum, 
  George 
  Town, 
  British 
  

   Guiana, 
  who, 
  at 
  Mr. 
  Sclater's 
  request, 
  obtained 
  the 
  speci- 
  

   mens. 
  The 
  object 
  of 
  this 
  paper 
  is 
  to 
  compare 
  the 
  structure 
  

   of 
  the 
  two 
  genera 
  Heliornis 
  and 
  Podica 
  in 
  those 
  points 
  as 
  

   to 
  which 
  I 
  was 
  not 
  able 
  to 
  make 
  a 
  comparison 
  in 
  my 
  paper 
  

   upon 
  the 
  anatomy 
  of 
  the 
  latter. 
  The 
  comparisons 
  now 
  made 
  

  

  * 
  " 
  Einige 
  Bemerkungen 
  ilber 
  Podoa 
  iind 
  ihr 
  Verliiiltniss 
  zur 
  Fulica, 
  

   Podiceps, 
  und 
  den 
  Steganopoden," 
  forming 
  section 
  iii. 
  of 
  " 
  Beitrage 
  zur 
  

   Naturgeschichte 
  der 
  ViJgel 
  " 
  &c., 
  M^m. 
  Ac. 
  St. 
  Petersbourg, 
  ser. 
  6, 
  t. 
  iii. 
  

   (1840). 
  

  

  t 
  'Pterylography.' 
  Engl, 
  trausl. 
  by 
  P. 
  L. 
  Sclater. 
  Ray 
  Society. 
  

   18G7. 
  

  

  J 
  " 
  Zur 
  Naturgeschichte 
  des 
  Surinamischen 
  Wasserhuhn's 
  {Podoa 
  

   surinamensis),'" 
  Zeitschr. 
  ges, 
  Naturw. 
  Bd. 
  xviii. 
  (1861) 
  p. 
  424. 
  

  

  § 
  " 
  On 
  the 
  Taxonouiic 
  Value 
  of 
  the 
  Intestinal 
  Convolutions 
  in 
  Birds," 
  

   P. 
  Z. 
  S. 
  1889, 
  p. 
  303. 
  

  

  II 
  " 
  On 
  the 
  Anatomy 
  of 
  Podica 
  senegalensis," 
  P. 
  Z. 
  S. 
  1890, 
  p. 
  425. 
  

  

  1[ 
  ' 
  Uutersuchungeu 
  zur 
  Morphologie 
  und 
  Systematik 
  der 
  Vogel, 
  

   p. 
  1029 
  et 
  seqq. 
  

  

  