﻿42 
  

  

  INTEODUCTION. 
  

  

  In 
  the 
  Pelobatidx 
  and 
  Bufonidx 
  the 
  inner 
  centrale 
  is 
  

   in 
  contact 
  with 
  the 
  radius. 
  

  

  Fig. 
  17. 
  

  

  

  Carpus 
  of 
  — 
  A. 
  Bombinator 
  pachypus. 
  b. 
  Pelodytes 
  punctatus. 
  

   c. 
  Bana 
  temporaria. 
  (Aftei' 
  Howes 
  and 
  Ridewood.) 
  

  

  B. 
  Radius. 
  U. 
  Ulna. 
  r. 
  Radiale. 
  u. 
  Ulnare. 
  c. 
  Centrale. 
  

   1 
  — 
  4. 
  Distal 
  tarsalia. 
  I 
  — 
  Y. 
  Digits. 
  

  

  There 
  are 
  four 
  functional 
  fingers, 
  with 
  elongate 
  

   metacarpals, 
  and 
  2, 
  2, 
  3, 
  3 
  phalanges. 
  The 
  distal 
  

   phalanx 
  is 
  pointed 
  or 
  slightly 
  expanded 
  at 
  the 
  end, 
  

   somewhat 
  as 
  in 
  the 
  human 
  skeleton 
  ; 
  or 
  bears 
  a 
  well- 
  

   marked 
  transverse 
  branch, 
  giving 
  it 
  a 
  T-shaped 
  

   appearance, 
  as 
  in 
  B. 
  grmca 
  ; 
  or 
  it 
  assumes 
  a 
  peculiar 
  

   claw-shaped 
  conformation 
  in 
  the 
  Hylidde, 
  which 
  is 
  

   described 
  and 
  figured 
  above, 
  p. 
  15. 
  In 
  addition 
  to 
  

   these 
  four 
  fingers 
  there 
  is 
  a 
  rudimentary 
  thumb 
  or 
  

   pollex, 
  usually 
  more 
  developed 
  in 
  males 
  than 
  in 
  

   females, 
  and 
  which, 
  besides 
  its 
  metacarpal, 
  may 
  show 
  

   one 
  or 
  two 
  ossicles 
  representing 
  phalanges. 
  The 
  meta- 
  

   carpal 
  of 
  the 
  pollex 
  is 
  very 
  strongly 
  developed 
  in 
  

   the 
  male 
  Discoglossiis, 
  which 
  is 
  also 
  remarkable 
  for 
  the 
  

   enlargement 
  of 
  the 
  second 
  metacarpal, 
  bearing 
  a 
  crest 
  

   along 
  the 
  inner 
  side. 
  

  

  The 
  pelvis 
  (Fig. 
  18) 
  is 
  much 
  elongate, 
  and 
  shaped 
  

   like 
  a 
  pair 
  of 
  tongs, 
  the 
  free 
  extremities 
  of 
  which 
  are 
  

   attached 
  to 
  the 
  diapophyses 
  of 
  the 
  sacral 
  vertebra. 
  

   The 
  lateral 
  branches 
  are 
  formed 
  by 
  the 
  ilia, 
  which, 
  

   with 
  the 
  ischia 
  behind 
  them, 
  bound 
  the 
  acetabulum 
  ; 
  

   the 
  third 
  element, 
  the 
  pubis, 
  situated 
  ventrally 
  be- 
  

   tween 
  the 
  ilium 
  and 
  the 
  ischium, 
  is 
  often 
  cartilaginous 
  

   or 
  calcified, 
  and 
  absent 
  in 
  Bomhinator. 
  In 
  Pelobates 
  

  

  