﻿DISCOGLOSSUS. 
  137 
  

  

  not 
  begin 
  to 
  pair, 
  so 
  far 
  as 
  I 
  could 
  observe, 
  until 
  the 
  

   beginning 
  of 
  June. 
  The 
  first 
  eggs, 
  about 
  400 
  in 
  

   number, 
  I 
  found 
  on 
  tlie 
  bottom 
  of 
  the 
  tank 
  on 
  the 
  

   morning 
  of 
  June 
  7th, 
  the 
  embryos 
  emerging 
  on 
  the 
  

   10th 
  ; 
  whilst 
  on 
  the 
  14th, 
  or 
  exactly 
  a 
  week 
  later, 
  the 
  

   young 
  had 
  lost 
  their 
  external 
  gills 
  and 
  entered 
  the 
  

   tadpole 
  stage, 
  measuring 
  11 
  mm. 
  total 
  length, 
  buds 
  

   of 
  the 
  hind 
  limbs 
  beinof 
  discernible 
  on 
  the 
  17th. 
  

   On 
  the 
  23rd 
  the 
  largest 
  specimens 
  measured 
  21 
  mm., 
  

   and 
  on 
  the 
  3rd 
  July 
  some 
  had 
  reached 
  their 
  full 
  

   length, 
  viz. 
  25 
  to 
  30 
  mm. 
  On 
  the 
  5th 
  July 
  some 
  

   had 
  put 
  on 
  the 
  striped 
  livery. 
  The 
  fore 
  limbs 
  first 
  

   appeared 
  on 
  the 
  6th, 
  and 
  the 
  metamorphosis 
  was 
  

   completed 
  by 
  the 
  8th, 
  when 
  the 
  first 
  specimens 
  left 
  

   the 
  water 
  with 
  a 
  reduced 
  caudal 
  appendage, 
  and 
  

   measuring 
  8 
  to 
  10 
  mm. 
  from 
  snout 
  to 
  vent, 
  the 
  last 
  

   metamorphosing 
  as 
  late 
  as 
  August 
  6th. 
  Striped 
  speci- 
  

   mens 
  were 
  in 
  the 
  proportion 
  of 
  one 
  to 
  four 
  spotted 
  or 
  

   immaculate. 
  

  

  On 
  the 
  mornino^ 
  of 
  June 
  14th 
  the 
  tank 
  ao^ain 
  con- 
  

   tained 
  eggs, 
  895 
  in 
  number, 
  which, 
  from 
  their 
  con- 
  

   dition, 
  must 
  have 
  been 
  deposited 
  in 
  the 
  night 
  of 
  the 
  

   12th 
  — 
  13th 
  (I 
  was 
  absent 
  on 
  Sunday, 
  13th), 
  and 
  the 
  

   embryos 
  of 
  which 
  were 
  liberated 
  in 
  the 
  afternoon 
  of 
  

   the 
  14th, 
  thus 
  less 
  than 
  forty-eight 
  hours 
  after 
  the 
  

   deposition 
  of 
  the 
  eggs 
  — 
  a 
  process 
  of 
  development 
  

   more 
  rapid 
  than 
  has 
  been 
  observed 
  in 
  any 
  other 
  

   species 
  of 
  Batrachians. 
  The 
  young 
  from 
  this 
  brood 
  

   began 
  to 
  leave 
  the 
  water 
  on 
  July 
  20th, 
  whilst 
  others 
  

   retained 
  the 
  larval 
  condition 
  until 
  October 
  5th. 
  JN^one 
  

   were 
  of 
  the 
  striped 
  form. 
  A 
  third 
  lot 
  of 
  936 
  eggs 
  

   were 
  deposited 
  during 
  the 
  night 
  of 
  July 
  6th 
  — 
  7th; 
  

   they 
  hatched 
  in 
  the 
  night 
  of 
  8th 
  — 
  9th, 
  and 
  the 
  young 
  

   completed 
  their 
  metamorphosis 
  between 
  August 
  16th 
  

   and 
  October, 
  a 
  few 
  being 
  still 
  in 
  the 
  tadpole 
  condi- 
  

   tion 
  whilst 
  these 
  lines 
  are 
  passing 
  through 
  the 
  press. 
  

   About 
  two-thirds 
  of 
  them 
  belonged 
  to 
  the 
  striped 
  

   form. 
  In 
  all 
  these 
  cases 
  I 
  was 
  struck 
  by 
  the 
  ex- 
  

   tremely 
  small 
  proportion 
  of 
  eggs 
  that 
  did 
  not 
  develop. 
  

  

  