﻿HYLA. 
  259 
  

  

  Eggs. 
  — 
  Deposited 
  in 
  several 
  lumps, 
  not 
  exceeding 
  

   the 
  size 
  of 
  a 
  walnut, 
  attached 
  to 
  weeds 
  below 
  the 
  

   surface 
  of 
  the 
  water. 
  Vitelline 
  sphere 
  

   measuring 
  1-J 
  mm. 
  in 
  diameter, 
  yellow- 
  

   ish-white 
  with 
  grey 
  or 
  pale 
  brown 
  

   upper 
  pole 
  ; 
  external 
  adhesive 
  envelop 
  

   not 
  measuring 
  more 
  than 
  4 
  mm. 
  in 
  

   diameter. 
  Each 
  female 
  produces 
  only 
  

   800 
  to 
  1000 
  eggs. 
  The 
  embryo, 
  when 
  

   liberated, 
  is 
  yellowish, 
  with 
  rudi- 
  

   mentary 
  branched 
  external 
  gills, 
  and 
  a 
  well-developed 
  

   tail. 
  

  

  Tadi-ole 
  (PI. 
  II, 
  figs. 
  6 
  — 
  8). 
  — 
  Length 
  of 
  body 
  once 
  

   and 
  one-third 
  to 
  once 
  and 
  a 
  half 
  its 
  width, 
  about 
  half 
  

   the 
  length 
  of 
  the 
  tail. 
  Nostrils 
  a 
  little 
  nearer 
  the 
  

   eyes 
  than 
  the 
  end 
  of 
  the 
  snout. 
  Eyes 
  perfectly 
  

   lateral, 
  visible 
  from 
  above 
  and 
  from 
  below, 
  a 
  little 
  

   nearer 
  the 
  spiraculum 
  than 
  the 
  end 
  of 
  the 
  snout 
  ; 
  

   the 
  distance 
  between 
  the 
  eyes 
  once 
  and 
  a 
  half 
  to 
  twice 
  

   as 
  great 
  as 
  the 
  distance 
  between 
  the 
  nostrils, 
  wdiich 
  

   equals 
  the 
  width 
  of 
  the 
  mouth. 
  Spiraculum 
  on 
  the 
  

   left 
  side, 
  directed 
  upwards 
  and 
  backwards, 
  nearer 
  the 
  

   posterior 
  than 
  the 
  anterior 
  extremity 
  of 
  the 
  body, 
  not 
  

   very 
  prominent, 
  but 
  visible 
  from 
  above 
  and 
  from 
  

   below. 
  Anus 
  opening 
  on 
  the 
  right 
  side, 
  close 
  to 
  the 
  

   body, 
  above 
  the 
  lower 
  edge 
  of 
  the 
  tail. 
  Tail 
  once 
  

   and 
  three-fourths 
  to 
  twice 
  and 
  one-third 
  the 
  length 
  

   of 
  the 
  body, 
  twice 
  to 
  twice 
  and 
  a 
  half 
  as 
  long 
  as 
  deep, 
  

   acutely 
  pointed, 
  attenuate 
  or 
  mucronate 
  at 
  the 
  end; 
  

   upper 
  crest 
  very 
  convex, 
  and 
  extending 
  far 
  forwards 
  

   on 
  the 
  back, 
  almost 
  to 
  between 
  the 
  eyes 
  ; 
  lower 
  crest 
  

   as 
  much 
  developed 
  as 
  the 
  upper, 
  and 
  extending 
  on 
  to 
  

   the 
  belly 
  considerably 
  beyond 
  the 
  anus 
  ; 
  the 
  depth 
  of 
  

   the 
  muscular 
  portion 
  at 
  its 
  base 
  one-third 
  or 
  rather 
  

   less 
  than 
  one-third 
  the 
  greatest 
  total 
  depth. 
  

  

  Beak 
  broadly 
  edged 
  with 
  black. 
  Lips 
  bordered 
  

   with 
  papillse, 
  which 
  are 
  absent 
  in 
  the 
  middle 
  of 
  the 
  

   upper 
  border, 
  and 
  usually 
  form 
  two 
  rows 
  on 
  the 
  lower 
  

   lip. 
  Series 
  of 
  labial 
  teeth 
  f 
  , 
  all 
  except 
  the 
  first 
  lower 
  

  

  