﻿HYLA. 
  

  

  257 
  

  

  row, 
  and 
  two 
  bones 
  to 
  the 
  prsehallux. 
  Terminal 
  

   phalanges 
  claw-shaped, 
  swollen 
  at 
  the 
  base. 
  

  

  Measurements 
  or 
  Skeleton 
  (in 
  millimetres). 
  

  

  Length 
  of 
  skull 
  

   Width 
  of 
  skull 
  

  

  F. 
  

  

  s 
  

  

  13 
  

  

  16 
  

  

  typica. 
  

  

  ? 
  

   ... 
  13 
  

   ... 
  16 
  

  

  V. 
  savignyi. 
  

  

  S 
  

   11 
  

   14 
  

  

  V. 
  meridion 
  

  

  12 
  

   15 
  

  

  Least 
  interorbital 
  width 
  

  

  4 
  

  

  ... 
  4 
  

  

  3-5 
  . 
  

  

  4 
  

  

  Dorsal 
  vertebral 
  column 
  

  

  16 
  

  

  ... 
  16 
  

  

  14 
  

  

  16 
  

  

  Urostyle 
  

  

  15 
  

  

  ... 
  13 
  

  

  13 
  

  

  14 
  

  

  Humerus 
  

  

  12 
  

  

  ... 
  11 
  

  

  11 
  

  

  11 
  

  

  Radius-ulna 
  

  

  8 
  

  

  ... 
  7 
  

  

  6-5 
  . 
  

  

  75 
  

  

  Manus 
  

  

  15 
  

  

  ... 
  14 
  

  

  13 
  

  

  13 
  

  

  Pelvis 
  

  

  19 
  

  

  ... 
  18 
  

  

  17 
  

  

  19 
  

  

  Femur 
  

  

  19 
  

  

  ... 
  19 
  

  

  18 
  

  

  20 
  

  

  Tibia 
  

  

  19 
  

  

  ... 
  18 
  

  

  19 
  

  

  21 
  

  

  Tarsus 
  

  

  . 
  11 
  

  

  ... 
  11 
  

  

  10 
  

  

  12 
  

  

  Pes 
  . 
  

  

  20 
  

  

  ... 
  19 
  

  

  17 
  

  

  20 
  

  

  Habits. 
  — 
  Hyla 
  arborea 
  holds 
  a 
  unique 
  position 
  

   among 
  European 
  Batrachians 
  from 
  its 
  scansorial, 
  

   arboreal 
  habits. 
  The 
  adhesive 
  disks 
  in 
  which 
  its 
  digits 
  

   terminate 
  enable 
  it 
  to 
  climb 
  with 
  the 
  greatest 
  facility 
  

   up 
  smooth 
  vertical 
  surfaces, 
  and 
  a 
  considerable 
  part 
  of 
  

   its 
  existence 
  is 
  spent 
  in 
  the 
  foliage 
  of 
  bushes 
  and 
  

   trees. 
  Owing 
  probably 
  to 
  confidence 
  in 
  its 
  protec- 
  

   tive 
  coloration, 
  this 
  Batrachian 
  makes 
  no 
  attempt 
  

   to 
  escape 
  when 
  detected, 
  and, 
  although 
  a 
  powerful 
  

   jumper 
  and 
  expert 
  acrobat, 
  its 
  attitude 
  when 
  handled 
  

   is 
  so 
  quiet 
  and 
  passive 
  as 
  to 
  make 
  it 
  a 
  pet 
  in 
  all 
  

   countries 
  : 
  alone 
  of 
  its 
  tribe 
  it 
  does 
  not 
  inspire 
  fright 
  

   or 
  repulsion 
  to 
  most 
  people, 
  although 
  the 
  acrid 
  secre- 
  

   tion 
  of 
  its 
  skin 
  is 
  highly 
  poisonous, 
  and 
  produces 
  a 
  

   smarting 
  sensation 
  when 
  applied 
  to 
  our 
  mucous 
  mem- 
  

   branes 
  or 
  to 
  excoriated 
  parts 
  of 
  our 
  fingers. 
  

  

  Its 
  barometrical 
  qualities, 
  so 
  valued 
  in 
  Germany, 
  

   where 
  the 
  little 
  frog 
  is 
  kept 
  in 
  glass 
  cylinders 
  furnished 
  

   with 
  a 
  ladder 
  standing 
  in 
  an 
  inch 
  or 
  two 
  of 
  water, 
  

   which 
  ladder 
  the 
  frog 
  is 
  supposed 
  to 
  ascend 
  or 
  descend, 
  

   and 
  thus 
  forecast 
  the 
  weather, 
  have 
  been 
  much 
  

   exaggerated. 
  Lendenfeld's 
  experiments 
  have 
  con- 
  

   vinced 
  him 
  that 
  no 
  reliance 
  can 
  be 
  placed 
  on 
  its 
  

  

  s 
  

  

  