﻿SKELETON. 
  

   Fig. 
  18. 
  

  

  43 
  

  

  zl 
  

  

  Pelvis 
  and 
  hind 
  limb 
  of 
  

   Discoglossus 
  ])ictiis. 
  

  

  a. 
  Astragalus, 
  

   c. 
  Oalcaneum. 
  

  

  Femur. 
  

  

  Ilium. 
  

  

  Ischium. 
  

  

  Pubis. 
  

  

  Tibia- 
  fibula. 
  

  

  /■ 
  

  

  il. 
  

  

  is. 
  

  

  p. 
  

  

  t. 
  

  

  the 
  pubis 
  is 
  represented 
  by 
  a 
  

   small 
  ossified 
  nodule, 
  not 
  enter- 
  

   ing 
  the 
  acetabulum. 
  In 
  the 
  

   Discoglossidx 
  the 
  acetabulum 
  

   remains 
  open, 
  as 
  in 
  the 
  young 
  

   of 
  other 
  Batrachians. 
  

  

  The 
  femur 
  is 
  more 
  or 
  less 
  

   strongly 
  curved. 
  The 
  tibia 
  

   and 
  fibula 
  are 
  fused 
  to 
  a 
  

  

  single 
  nearly 
  straight 
  bone. 
  The 
  epiphyses 
  of 
  these 
  

  

  bones 
  remain 
  cartilaginous 
  in 
  the 
  Discoglossidx 
  and 
  

  

  Pelohatidde, 
  calcify 
  in 
  the 
  other 
  families. 
  

  

  The 
  tarsus 
  is 
  remarkable 
  for 
  the 
  elongation 
  of 
  the 
  

  

  astragalus 
  and 
  calcaneum, 
  which 
  form 
  an 
  additional 
  

  

  