﻿18 
  INTRODUCTION. 
  

  

  A. 
  Pupil 
  round, 
  snbtriangular, 
  or 
  coi'diform. 
  

  

  1. 
  Vomerine 
  teetli 
  in 
  long 
  transverse 
  series; 
  

  

  tympanum 
  distinct 
  or 
  concealed 
  under 
  tbe 
  

   skin 
  . 
  . 
  . 
  . 
  1. 
  Discoglossus 
  pictus. 
  

  

  2. 
  Vomerine 
  teetli 
  in 
  two 
  groups; 
  no 
  tym- 
  

  

  panum. 
  

   Tibia 
  shorter 
  than 
  the 
  foot 
  

  

  2. 
  Bomhinator 
  igneiis. 
  

   Tibia 
  as 
  long 
  as 
  or 
  a 
  little 
  longer 
  than 
  the 
  

  

  foot 
  . 
  . 
  . 
  . 
  3. 
  Bomhinator 
  pa 
  dry 
  ims. 
  

  

  B. 
  Pupil 
  vertical 
  ; 
  vomerine 
  teeth 
  in 
  short 
  trans- 
  

  

  verse 
  or 
  slightly 
  oblique 
  series 
  ; 
  tympanum 
  

  

  distinct. 
  

   Three 
  palmar 
  tubercles 
  ; 
  fourth 
  finger 
  as 
  long 
  

  

  as 
  or 
  slightly 
  shorter 
  than 
  second 
  

  

  4. 
  Alytes 
  obstetricans. 
  

   Two 
  palmar 
  tubercles 
  ; 
  fourth 
  finger 
  much 
  

  

  shorter 
  than 
  second 
  5. 
  Alytes 
  cisternasli. 
  

  

  11. 
  Tongue 
  circular, 
  entire 
  or 
  slightly 
  notched, 
  and 
  

   free 
  behind 
  ; 
  vomerine 
  teeth 
  between 
  the 
  

   choange 
  ; 
  pupil 
  vertical 
  (Pelobatid^). 
  

  

  A. 
  Tympanum 
  distinct 
  or 
  concealed 
  under 
  the 
  

  

  skin 
  ; 
  toes 
  webbed 
  at 
  the 
  base 
  and 
  bordered 
  ; 
  

   inner 
  metatarsal 
  tubercle 
  small, 
  soft 
  

  

  6. 
  Pelodytes 
  imnctatiis. 
  

  

  B. 
  No 
  tympanum 
  ; 
  toes 
  nearly 
  entirely 
  webbed 
  ; 
  

  

  inner 
  metatarsal 
  tubercle 
  large, 
  hard, 
  com- 
  

   pressed, 
  sharp-edged. 
  

   Interorbital 
  space 
  and 
  occiput 
  convex 
  ; 
  meta- 
  

   tarsal 
  tubercle 
  yellowish 
  or 
  pale 
  brown 
  

  

  7. 
  Pelohates 
  fuscus. 
  

   Interorbital 
  space 
  and 
  occiput 
  flat 
  ; 
  metatarsal 
  

  

  tubercle 
  black 
  . 
  8. 
  Pelohates 
  cultrijjes. 
  

  

  III. 
  Tongue 
  elliptical 
  or 
  pyriform, 
  entire, 
  free 
  behind 
  ; 
  

   no 
  teeth 
  ; 
  pupil 
  horizontal 
  (Bufonid^). 
  

   Toes 
  at 
  least 
  nearly 
  half 
  webbed, 
  with 
  paired 
  

   subarticular 
  tubercles 
  ; 
  no 
  tarsal 
  fold 
  ; 
  inter- 
  

  

  