﻿TADPOLES. 
  107 
  

  

  Tail 
  not 
  more 
  than 
  once 
  and 
  a 
  half 
  as 
  lono;- 
  

   as 
  the 
  body 
  . 
  . 
  .P. 
  cultripes. 
  

  

  2. 
  Spiraculum 
  directed 
  straight 
  backwards, 
  

   tail 
  rounded 
  at 
  the 
  end; 
  both 
  upper 
  and 
  

   lower 
  lip 
  with 
  toothed 
  edge 
  ; 
  series 
  of 
  

   labial 
  teeth 
  f 
  . 
  . 
  . 
  . 
  Bufo. 
  

  

  Mouth 
  at 
  least 
  as 
  wide 
  as 
  the 
  interocular 
  

   space, 
  which 
  is 
  twice 
  as 
  great 
  as 
  the 
  

   distance 
  between 
  the 
  nostrils 
  ; 
  second 
  

   upper 
  series 
  of 
  labial 
  teeth 
  very 
  narrowly 
  

   interrupted 
  in 
  the 
  middle 
  . 
  B. 
  vulgaris. 
  

  

  Mouth 
  nearly 
  as 
  wide 
  as 
  the 
  interocular 
  space, 
  

   which 
  measures 
  once 
  and 
  a 
  half 
  the 
  dis- 
  

   tance 
  between 
  the 
  nostrils 
  ; 
  second 
  upper 
  

   series 
  of 
  labial 
  teeth 
  more 
  or 
  less 
  inter- 
  

   rupted 
  in 
  the 
  middle 
  . 
  . 
  B. 
  viridis. 
  

  

  Mouth 
  considerably 
  narrower 
  than 
  the 
  inter- 
  

   ocular 
  space, 
  which 
  is 
  nearly 
  twice 
  as 
  great 
  

   as 
  the 
  distance 
  between 
  the 
  nostrils 
  ; 
  

   second 
  upper 
  series 
  of 
  labial 
  teeth 
  very 
  

   widely 
  interrupted 
  in 
  the 
  middle. 
  

  

  B. 
  calamita. 
  

   B. 
  Anus 
  dextral 
  ; 
  spiraculum 
  directed 
  backwards 
  

   and 
  upwards 
  ; 
  lower 
  lip 
  bordered 
  with 
  

   papillae. 
  

  

  1. 
  Anus 
  opening 
  above 
  the 
  lower 
  edge 
  of 
  the 
  

  

  tail 
  ; 
  upper 
  caudal 
  crest 
  extending 
  far 
  

   forwards 
  on 
  the 
  back, 
  almost 
  to 
  between 
  

   the 
  eyes, 
  which 
  are 
  lateral 
  and 
  visible 
  

   from 
  the 
  ventral 
  as 
  well 
  as 
  from 
  the 
  

   dorsal 
  aspect 
  of 
  the 
  body 
  ; 
  series 
  of 
  labial 
  

   teeth 
  f 
  . 
  . 
  . 
  . 
  . 
  Hyla. 
  

  

  2. 
  Anus 
  opening 
  close 
  to 
  the 
  lower 
  edge 
  of 
  the 
  

  

  tail 
  ; 
  upper 
  caudal 
  crest 
  not 
  extending 
  

   forwards 
  beyond 
  the 
  vertical 
  of 
  the 
  spira- 
  

   culum 
  ; 
  eyes 
  on 
  the 
  upper 
  surface. 
  Eana. 
  

   a. 
  Series 
  of 
  labial 
  teeth 
  ^^^. 
  

   Interocular 
  space 
  at 
  least 
  twice 
  the 
  distance 
  

   between 
  the 
  nostrils, 
  and 
  much 
  greater 
  

  

  