﻿106 
  INTRODUOTION. 
  

  

  the 
  lip, 
  sometimes 
  narrowly 
  interrupted 
  above 
  ; 
  

   labial 
  teeth 
  in 
  f 
  series, 
  disposed 
  in 
  two 
  or 
  

   three 
  rows, 
  at 
  least 
  in 
  the 
  second 
  series. 
  

  

  A. 
  Spiraculum 
  equally 
  distant 
  from 
  the 
  anterior 
  

  

  and 
  the 
  posterior 
  extremity 
  of 
  the 
  body 
  ; 
  tail 
  

   at 
  least 
  once 
  and 
  a 
  half 
  the 
  length 
  of 
  the 
  body, 
  

   and 
  three 
  and 
  a 
  half 
  or 
  four 
  times 
  as 
  long 
  as 
  

   deep 
  ; 
  caudal 
  crests 
  with 
  a 
  polygonal 
  network 
  

   of 
  fine 
  black 
  lines 
  . 
  . 
  . 
  Discoglossus. 
  

  

  B. 
  Spiraculum 
  nearer 
  the 
  posterior 
  than 
  the 
  ante- 
  

  

  rior 
  extremity 
  of 
  the 
  body 
  ; 
  tail 
  not 
  more 
  

   than 
  once 
  and 
  a 
  half 
  the 
  length 
  of 
  the 
  body, 
  

   twice 
  to 
  twice 
  and 
  a 
  half 
  as 
  long 
  as 
  deep 
  ; 
  

   caudal 
  crests 
  with 
  fine 
  black 
  decussating 
  lines. 
  

  

  BoiMEINATOE. 
  

  

  Mouth 
  trigonal 
  . 
  . 
  . 
  B. 
  igneus. 
  

   Mouth 
  elliptical 
  . 
  . 
  . 
  B. 
  pachypus. 
  

  

  c. 
  Spiraculum 
  nearer 
  the 
  anterior 
  than 
  the 
  poste- 
  

   rior 
  extremity 
  of 
  the 
  body 
  ; 
  tail 
  at 
  least 
  once 
  

   and 
  a 
  half 
  the 
  length 
  of 
  the 
  body, 
  twice 
  and 
  

   two-thirds 
  to 
  thrice 
  and 
  a 
  half 
  as 
  long 
  as 
  

   deep 
  ; 
  no 
  black 
  network 
  . 
  . 
  Alttes. 
  

  

  II. 
  Spiraculum 
  sinistral; 
  labial 
  teeth 
  disposed 
  in 
  

   a 
  single 
  row 
  in 
  each 
  series 
  or 
  ridge. 
  

   A. 
  Anus 
  median. 
  

  

  1. 
  Spiraculum 
  directed 
  upwards 
  and 
  back- 
  

   wards; 
  lower 
  lip 
  bordered 
  with 
  papillae; 
  

   series 
  of 
  labial 
  teeth 
  |- 
  or 
  -f 
  . 
  

   a. 
  Tail 
  obtusely 
  pointed, 
  with 
  fine 
  black 
  de- 
  

   cussatino' 
  lines 
  ; 
  an 
  inverted 
  fold 
  on 
  each 
  

   side 
  of 
  the 
  lip, 
  the 
  upper 
  edge 
  of 
  which 
  

   bears 
  a 
  long 
  series 
  of 
  teeth 
  ; 
  beak 
  white 
  

   with 
  black 
  edo-e 
  . 
  . 
  Pelodytes. 
  

   h. 
  Tail 
  acutely 
  pointed, 
  without 
  black 
  lines 
  ; 
  

   first 
  series 
  of 
  upper 
  labial 
  teeth 
  short 
  ; 
  

   beak 
  entirely 
  black 
  . 
  . 
  Pelobates. 
  

  

  Tail 
  once 
  and 
  a 
  half 
  to 
  twice 
  as 
  long 
  as 
  the 
  

   body 
  .... 
  P.fusciis. 
  

  

  