﻿American 
  Fin-foot. 
  

  

  39 
  

  

  plate 
  of 
  bone 
  could 
  not 
  convert 
  tliem 
  into 
  the 
  similitude 
  of 
  

   the 
  inflated 
  bullae 
  of 
  the 
  Rails. 
  

  

  Other 
  smaller 
  points 
  of 
  difference 
  will 
  be 
  apparent 
  from 
  a 
  

   comparison 
  of 
  the 
  accompanying 
  figures 
  of 
  the 
  skulls 
  of 
  

   Heliornis 
  and 
  of 
  Podica^. 
  

  

  V. 
  Sternum. 
  

   The 
  sternum, 
  as 
  will 
  be 
  seen 
  by 
  the 
  figures 
  (6 
  and 
  7), 
  does 
  

  

  Fio;. 
  7. 
  

  

  Fio-. 
  6. 
  

  

  Fig. 
  6. 
  — 
  Heliornis 
  surinamensis. 
  Sternum, 
  \eutral 
  view 
  ; 
  nat. 
  size. 
  

   Fig. 
  7. 
  — 
  Sternum 
  of 
  Podica 
  senegalensis, 
  ventral 
  view; 
  nat. 
  size. 
  Co., 
  

  

  coracoid 
  ; 
  cL, 
  clavicle 
  (removed 
  on 
  right 
  side). 
  (From 
  P. 
  Z. 
  S. 
  

  

  1890, 
  p. 
  435.) 
  

  

  * 
  For 
  the 
  use 
  of 
  the 
  figures 
  of 
  Podica 
  I 
  am 
  indebted 
  to 
  the 
  kindness 
  

   of 
  the 
  Publication 
  Cumniittee 
  of 
  the 
  Zoological 
  Society. 
  

  

  