﻿DISCOGLOSSUS. 
  131 
  

  

  poral 
  spot 
  larger, 
  and 
  the 
  inner 
  metatarsal 
  tubercle 
  

   smaller. 
  But 
  a 
  male 
  specimen 
  from 
  Algiers, 
  collected 
  

   by 
  Mr. 
  Sclater, 
  has 
  the 
  tympanum 
  completely 
  con- 
  

   cealed 
  ; 
  and, 
  on 
  the 
  other 
  hand, 
  the 
  organ 
  is 
  perfectly 
  

   distinct 
  in 
  a 
  male 
  from 
  Corunna 
  and 
  in 
  another 
  col- 
  

   lected 
  by 
  M. 
  Bosca 
  on 
  the 
  Sierra 
  Morena 
  ; 
  whilst 
  a 
  

   number 
  of 
  specimens 
  from 
  Europe 
  and 
  Africa 
  are 
  in- 
  

   termediate 
  between 
  the 
  two 
  extremes. 
  I 
  have 
  now 
  

   before 
  me 
  a 
  large 
  number 
  of 
  living 
  specimens 
  from 
  

   Oran. 
  In 
  some 
  the 
  tympanum 
  is 
  very 
  apparent, 
  whilst 
  

   in 
  others 
  its 
  presence 
  can 
  hardly 
  be 
  detected. 
  The 
  

   shape 
  and 
  extent 
  of 
  the 
  dark 
  temporal 
  band 
  and 
  the 
  

   size 
  of 
  the 
  metatarsal 
  tubercle 
  are 
  subject 
  to 
  variation 
  

   in 
  specimens 
  from 
  the 
  same 
  locality, 
  and 
  I 
  have 
  failed 
  

   to 
  find 
  any 
  constancy 
  in 
  the 
  other 
  very 
  trivial 
  distinc- 
  

   tive 
  characters 
  pointed 
  out 
  by 
  Heron-Royer. 
  Dr. 
  

   Anderson, 
  who 
  has 
  collected 
  specimens 
  in 
  Algeria, 
  

   some 
  of 
  which 
  show 
  no 
  trace 
  of 
  a 
  tympanum 
  exter- 
  

   nally, 
  concurs 
  with 
  me 
  in 
  rejecting 
  D. 
  auritus 
  even 
  as 
  

   a 
  local 
  form. 
  

  

  Specimens 
  from 
  Sardinia, 
  Corsica, 
  Montecristo, 
  and 
  

   Giglio, 
  it 
  has 
  been 
  observed, 
  never 
  show 
  the 
  striped 
  

   form 
  so 
  frequent 
  in 
  Spain 
  and 
  Africa 
  ; 
  but 
  neither 
  do 
  

   the 
  Maltese 
  specimens, 
  which 
  are 
  referred 
  by 
  Camerano 
  

   to 
  D. 
  lyictus. 
  

  

  Measurements 
  (in 
  millimetres). 
  

  

  

  1. 
  

  

  2. 
  

  

  3. 
  4. 
  

  

  5. 
  6. 
  

  

  7. 
  

  

  8. 
  

  

  From 
  snout 
  to 
  vent 
  

  

  . 
  58 
  . 
  

  

  .55 
  

  

  ...60 
  ... 
  73 
  . 
  

  

  ..55. 
  ..54.. 
  

  

  .43 
  .. 
  

  

  .76 
  

  

  Length 
  of 
  head 
  

  

  . 
  18 
  . 
  

  

  .16 
  

  

  ...18 
  ... 
  21 
  . 
  

  

  ..16. 
  ..15. 
  

  

  .14 
  .. 
  

  

  .19 
  

  

  Width 
  of 
  head 
  

  

  . 
  19 
  . 
  

  

  ..18 
  

  

  ...21 
  ... 
  25 
  . 
  

  

  ..19....16. 
  

  

  .15 
  .. 
  

  

  .23 
  

  

  Diameter 
  of 
  eye 
  

  

  . 
  5 
  . 
  

  

  . 
  4 
  

  

  ...5 
  ... 
  6 
  . 
  

  

  .. 
  5... 
  4.. 
  

  

  . 
  3-5. 
  

  

  . 
  6 
  

  

  Interorbital 
  width 
  . 
  

  

  . 
  3-5. 
  

  

  .. 
  3-5... 
  4 
  ... 
  4-5. 
  

  

  .. 
  3... 
  3. 
  

  

  . 
  3 
  . 
  

  

  . 
  5 
  

  

  From 
  eye 
  to 
  nostril 
  

  

  . 
  5 
  . 
  

  

  .. 
  4 
  

  

  ... 
  4-5... 
  5-5. 
  

  

  .. 
  4... 
  4. 
  

  

  . 
  4 
  . 
  

  

  . 
  5 
  

  

  „ 
  ,, 
  end 
  of 
  snout 
  

  

  . 
  8 
  . 
  

  

  .. 
  7- 
  

  

  5... 
  8-5... 
  10 
  . 
  

  

  .. 
  7... 
  7. 
  

  

  . 
  6 
  . 
  

  

  . 
  9 
  

  

  Fore 
  limb 
  

  

  . 
  34 
  . 
  

  

  ..29 
  

  

  ...35 
  .. 
  40 
  . 
  

  

  ..27. 
  ..26. 
  

  

  .24 
  . 
  

  

  .35 
  

  

  Hind 
  limb 
  . 
  

  

  . 
  83 
  . 
  

  

  ..80 
  

  

  ...91 
  ...105 
  . 
  

  

  ..84.. 
  .77. 
  

  

  .64 
  . 
  

  

  .95 
  

  

  Tibia 
  

  

  . 
  28 
  . 
  

  

  ..26 
  

  

  ...30 
  ... 
  35 
  . 
  

  

  ..26.. 
  .25. 
  

  

  ..20 
  . 
  

  

  .33 
  

  

  Foot 
  . 
  

  

  . 
  26 
  . 
  

  

  ..25 
  

  

  ...26 
  ... 
  32 
  . 
  

  

  ..24.. 
  .22. 
  

  

  ..18 
  . 
  

  

  .30 
  

  

  1, 
  5. 
  Corunna 
  : 
  Seoane. 
  

  

  

  

  4. 
  Oran 
  : 
  Chevreux 
  

  

  

  

  2, 
  6. 
  Coimbra 
  : 
  Gadow. 
  

  

  

  

  7. 
  Giglio: 
  

  

  Florence 
  

  

  Mus. 
  

  

  

  3. 
  Luras, 
  Sardinia 
  : 
  C 
  

  

  amerano. 
  

  

  8. 
  Algiers 
  

  

  : 
  H4ron-' 
  

  

  Royer 
  

  

  

  