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  DISCOGLOSSID^. 
  

  

  and 
  the 
  very 
  slight 
  amounfc 
  of 
  mortality 
  that 
  took 
  

   place 
  among 
  the 
  embryos 
  ; 
  whilst 
  of 
  the 
  tadpoles 
  all 
  

   except 
  such 
  as 
  I 
  killed 
  for 
  study 
  went 
  through 
  the 
  

   metamorphosis. 
  In 
  fact, 
  the 
  success 
  in 
  rearing 
  these 
  

   broods 
  of 
  Discoglossiis 
  has 
  been 
  greater 
  than 
  I 
  have 
  

   experienced 
  in 
  dealing 
  with 
  any 
  other 
  kind 
  of 
  tailless 
  

   Batrachians 
  under 
  similar 
  conditions. 
  I 
  had 
  no 
  diflfi- 
  

   culty 
  in 
  feeding 
  the 
  tiny 
  young 
  on 
  aphides. 
  

  

  On 
  the 
  17th 
  July 
  eggs 
  had 
  again 
  been 
  produced 
  

   during 
  the 
  night, 
  but 
  they 
  numbered 
  only 
  306. 
  They 
  

   hatched 
  on 
  the 
  18th 
  ; 
  most 
  of 
  them 
  were 
  destroyed 
  

   shortly 
  after 
  by 
  a 
  fungus. 
  A 
  further 
  oviposition 
  took 
  

   place 
  under 
  my 
  eyes 
  in 
  the 
  afternoon 
  of 
  July 
  31st, 
  

   341 
  eggs 
  being 
  produced. 
  The 
  male 
  was 
  spotted, 
  the 
  

   female 
  striped. 
  The 
  same 
  pair 
  remained 
  in 
  the 
  tank, 
  

   which, 
  on 
  the 
  morning 
  of 
  August 
  2nd, 
  contained 
  a 
  

   further 
  lot 
  of 
  eggs, 
  543 
  in 
  number 
  — 
  laid, 
  I 
  have 
  every 
  

   reason 
  to 
  believe, 
  by 
  the 
  same 
  female. 
  Both 
  these 
  

   broods 
  hatched 
  in 
  less 
  than 
  thirty-six 
  hours. 
  The 
  

   first 
  went 
  through 
  their 
  evolution 
  without 
  mishap, 
  

   metamorphosis 
  beginning 
  on 
  September 
  11th; 
  whilst 
  

   the 
  second 
  perished 
  wholesale 
  as 
  embryos 
  through 
  a 
  

   fungus. 
  Among 
  the 
  former, 
  contrary 
  to 
  my 
  expecta- 
  

   tion, 
  not 
  one 
  developed 
  into 
  the 
  striped 
  form, 
  but 
  I 
  

   had 
  the 
  pleasure 
  of 
  obtaining 
  an 
  albino 
  tadpole, 
  flesh- 
  

   colour 
  with 
  large 
  pale 
  golden 
  spots; 
  the 
  so-called 
  

   pigmentary 
  network 
  was 
  distinguishable, 
  of 
  an 
  

   opaque 
  white. 
  The 
  albinism 
  was, 
  however, 
  not 
  per- 
  

   fect, 
  for 
  the 
  pupil 
  of 
  the 
  eye 
  was 
  black 
  instead 
  of 
  red, 
  

   and 
  later 
  in 
  life 
  a 
  small 
  quantity 
  of 
  brown 
  pigment 
  

   appeared 
  on 
  the 
  back. 
  Further 
  ovipositions 
  took 
  place 
  

   at 
  night 
  on 
  August 
  18—19, 
  20—21, 
  23—24, 
  and 
  26— 
  

   27, 
  the 
  number 
  of 
  eggs 
  being 
  314, 
  830, 
  598, 
  360. 
  All 
  

   these 
  broods 
  did 
  well, 
  and 
  at 
  the 
  time 
  this 
  account 
  of 
  

   them 
  is 
  written 
  I 
  have 
  a 
  large 
  number 
  of 
  tadpoles, 
  

   which 
  will 
  probably 
  not 
  transform 
  until 
  the 
  coming 
  

   spring. 
  They 
  differ 
  greatly 
  in 
  their 
  degree 
  of 
  deve- 
  

   lopment, 
  irrespective 
  of 
  age, 
  measuring 
  from 
  11 
  to 
  30 
  

   millimetres 
  total 
  length. 
  

  

  