﻿186 
  

  

  PELOBATIDiE. 
  

  

  three 
  times 
  in 
  the 
  longitudinal, 
  but 
  little 
  shorter 
  than 
  

   the 
  urostyle, 
  which 
  articulates 
  by 
  two 
  sockets, 
  and 
  

   measures 
  three-fifths 
  to 
  two-thirds 
  the 
  length 
  of 
  the 
  

   remainder 
  of 
  the 
  vertebral 
  column. 
  

  

  Prgecoracoids 
  slender, 
  strongly 
  curved 
  ; 
  coracoids 
  

   nearly 
  straight, 
  dilated 
  at 
  both 
  euds 
  ; 
  a 
  cartilaginous 
  

   omosternum 
  ; 
  sternum 
  with 
  a 
  bony 
  style 
  dilated 
  proxi- 
  

   mally, 
  and 
  a 
  large 
  discoid 
  cartilage. 
  Humerus 
  con- 
  

   siderably 
  longer 
  than 
  radius-ulna. 
  Carpus 
  with 
  seven 
  

   elements, 
  three 
  of 
  which 
  are 
  in 
  contact 
  with 
  radius- 
  

   ulna 
  ; 
  a 
  single 
  bone 
  in 
  the 
  pollex. 
  

  

  Pelvis 
  three-quarters 
  the 
  length 
  of 
  the 
  vertebral 
  

   column 
  ; 
  iha 
  with 
  an 
  inner 
  groove, 
  embracing 
  the 
  

   sacral 
  processes; 
  the 
  pubis 
  does 
  not 
  ossify. 
  Femur 
  

   and 
  tibia 
  with 
  the 
  epiphysis 
  cartilaginous 
  ; 
  tibia 
  a 
  

   little 
  longer 
  than 
  the 
  femur, 
  nearly 
  as 
  long 
  as 
  the 
  

   pelvis 
  ; 
  calcaneum 
  and 
  astragalus 
  completely 
  fused 
  

   into 
  a 
  single 
  slender 
  bone 
  with 
  a 
  minute 
  foramen 
  in 
  

   the 
  middle, 
  resembling 
  the 
  tibia, 
  of 
  which 
  it 
  measures 
  

   three-fifths 
  the 
  length 
  ; 
  the 
  elements 
  of 
  the 
  distal 
  row 
  

   of 
  the 
  tarsus 
  are 
  not 
  ossified, 
  and 
  the 
  prsehallux 
  

   contains 
  two 
  cartilages. 
  Distal 
  phalanx 
  of 
  all 
  digits 
  

   slightly 
  expanded 
  at 
  the 
  apex. 
  

  

  Measueements 
  of 
  Skeleton 
  (in 
  millimetres). 
  

  

  

  

  <? 
  

  

  ? 
  

  

  Length 
  of 
  skull 
  

  

  11 
  

  

  14 
  

  

  Width 
  of 
  skull 
  

  

  11 
  

  

  15 
  

  

  Least 
  interorbital 
  width 
  . 
  

  

  2 
  

  

  3 
  

  

  Dorsal 
  vertebral 
  column 
  . 
  

  

  12 
  

  

  17 
  

  

  Urostyle 
  . 
  . 
  . 
  . 
  

  

  7 
  

  

  11 
  

  

  Humerus 
  . 
  

  

  

  8-5 
  

  

  11 
  

  

  Radius 
  -ulna 
  

  

  

  6 
  

  

  8 
  

  

  Manus 
  

  

  

  9 
  

  

  12 
  

  

  Pelvis 
  

  

  

  15 
  

  

  20 
  

  

  Femur 
  

  

  

  14 
  

  

  17 
  

  

  Tibia 
  

  

  

  16 
  

  

  18 
  

  

  Tarsus 
  

  

  

  9 
  

  

  11 
  

  

  Pes 
  

  

  

  17 
  

  

  20 
  

  

  Habits. 
  — 
  This 
  small 
  and 
  graceful 
  Batrachian 
  is 
  essen- 
  

   tially 
  nocturnal 
  ; 
  only 
  during 
  the 
  breeding 
  season 
  is 
  it 
  

   met 
  with 
  in 
  the 
  daytime. 
  Its 
  long 
  limbs 
  enable 
  it 
  

  

  