﻿EANA. 
  

  

  27' 
  

  

  [5], 
  iv, 
  1872, 
  p. 
  201) 
  appears 
  to 
  have 
  been 
  the 
  first 
  

   to 
  record 
  blue 
  specimens 
  of 
  B. 
  esculenta 
  ; 
  others 
  have 
  

   since 
  been 
  examined 
  by 
  Pfliiger 
  and 
  by 
  Leydig 
  at 
  

   Bonn, 
  by 
  Norman 
  Douglass 
  in 
  Baden, 
  and 
  by 
  myself 
  

   at 
  Frankfort-on-the-Main. 
  I 
  have 
  also 
  received 
  a 
  

   specimen 
  from 
  Basle 
  through 
  the 
  late 
  Dr. 
  F. 
  Miiller. 
  

  

  Brown 
  specimens, 
  without 
  or 
  with 
  little 
  green, 
  as 
  

   in 
  the 
  specimens 
  of 
  var. 
  lessonss 
  from 
  Norfolk, 
  are 
  

   not 
  uncommon 
  near 
  Berlin. 
  The 
  var. 
  sylvatica 
  of 
  

   Koch 
  is 
  based 
  on 
  such 
  a 
  specimen. 
  I 
  have 
  examined 
  

   the 
  type 
  of 
  the 
  latter, 
  a 
  female, 
  which 
  measures 
  67 
  

   mm. 
  from 
  snout 
  to 
  vent; 
  hind 
  limb 
  92; 
  tibia 
  26; 
  

   foot 
  27; 
  inner 
  toe 
  6; 
  inner 
  metatarsal 
  tubercle 
  3. 
  

  

  Measurements 
  (in 
  millimetres). 
  

  

  1. 
  

  

  2. 
  

  

  3. 
  

  

  4. 
  

  

  r 
  

   5. 
  

  

  6. 
  

  

  7. 
  

  

  8. 
  

  

  From 
  snout 
  to 
  vent 
  73 
  .. 
  

  

  . 
  68 
  . 
  

  

  . 
  64 
  . 
  

  

  . 
  65 
  .. 
  

  

  . 
  84 
  . 
  

  

  . 
  85.. 
  

  

  . 
  90 
  . 
  

  

  ..60 
  

  

  Length 
  of 
  head 
  . 
  24 
  . 
  

  

  . 
  22 
  . 
  

  

  .. 
  21 
  . 
  

  

  . 
  21 
  . 
  

  

  . 
  26 
  . 
  

  

  . 
  26.. 
  

  

  . 
  28 
  . 
  

  

  ..20 
  

  

  Width 
  of 
  head 
  . 
  25 
  . 
  

  

  . 
  23 
  . 
  

  

  .. 
  22 
  . 
  

  

  . 
  21 
  .. 
  

  

  . 
  29 
  . 
  

  

  . 
  29.. 
  

  

  . 
  32 
  . 
  

  

  ..21 
  

  

  Diameter 
  of 
  eye 
  . 
  8 
  . 
  

  

  . 
  7 
  . 
  

  

  . 
  7 
  . 
  

  

  . 
  7 
  . 
  

  

  . 
  8 
  . 
  

  

  . 
  7.. 
  

  

  . 
  8 
  . 
  

  

  .. 
  6-5 
  

  

  Interorbital 
  width 
  1'5.. 
  

  

  o 
  

  

  2 
  

  

  . 
  2-5. 
  

  

  . 
  2-5. 
  

  

  . 
  3.. 
  

  

  . 
  2-5. 
  

  

  .. 
  2 
  

  

  From 
  eye 
  to 
  nostril 
  4 
  . 
  

  

  '. 
  4 
  '. 
  

  

  .'. 
  4 
  '. 
  

  

  . 
  4 
  . 
  

  

  . 
  5 
  . 
  

  

  . 
  5.. 
  

  

  . 
  6 
  . 
  

  

  .. 
  4 
  

  

  From 
  eye 
  to 
  end 
  of 
  

  

  

  

  

  

  

  

  

  snout 
  . 
  . 
  . 
  10 
  . 
  . 
  

  

  . 
  10 
  . 
  

  

  . 
  10 
  . 
  

  

  . 
  10 
  .. 
  

  

  . 
  12 
  . 
  

  

  . 
  12.. 
  

  

  . 
  13 
  . 
  

  

  .. 
  95 
  

  

  Diameter 
  of 
  tym- 
  

  

  

  

  

  

  

  

  

  panum 
  . 
  . 
  6 
  . 
  

  

  . 
  4 
  . 
  

  

  . 
  4-5. 
  

  

  . 
  4 
  . 
  

  

  . 
  6 
  . 
  

  

  . 
  5.. 
  

  

  . 
  6 
  . 
  

  

  .. 
  4 
  

  

  Fore 
  limb 
  . 
  . 
  40 
  . 
  

  

  . 
  39 
  . 
  

  

  . 
  37 
  . 
  

  

  . 
  39 
  . 
  

  

  . 
  44 
  . 
  

  

  . 
  43.. 
  

  

  . 
  50 
  . 
  

  

  ..32 
  

  

  Hind 
  limb 
  . 
  .106 
  . 
  

  

  .102 
  . 
  

  

  ..100 
  . 
  

  

  .109 
  . 
  

  

  .123 
  . 
  

  

  .125.. 
  

  

  .137 
  . 
  

  

  ..94 
  

  

  Tibia 
  . 
  . 
  . 
  33 
  . 
  

  

  . 
  30 
  . 
  

  

  . 
  30 
  . 
  

  

  . 
  34 
  .. 
  

  

  . 
  38 
  . 
  

  

  . 
  35.. 
  

  

  . 
  42 
  . 
  

  

  ..28 
  

  

  Foot 
  . 
  . 
  . 
  35 
  . 
  

  

  . 
  35 
  . 
  

  

  . 
  33 
  . 
  

  

  . 
  36 
  . 
  

  

  . 
  40 
  . 
  

  

  . 
  38.. 
  

  

  . 
  45 
  . 
  

  

  ..31 
  

  

  Inner 
  toe 
  (from 
  

  

  

  

  

  

  

  

  

  tubercle) 
  . 
  .8*5.. 
  

  

  . 
  8-5. 
  

  

  . 
  8 
  . 
  

  

  . 
  9 
  .. 
  

  

  . 
  10 
  . 
  

  

  . 
  9.. 
  

  

  . 
  12 
  . 
  

  

  .. 
  8 
  

  

  Inner 
  metatarsal 
  

  

  

  

  

  

  

  

  

  tubercle 
  . 
  . 
  3*5.. 
  

  

  . 
  4 
  . 
  

  

  . 
  4 
  . 
  

  

  . 
  35. 
  

  

  . 
  4 
  . 
  

  

  . 
  5.. 
  

  

  . 
  5-5. 
  

  

  .. 
  35 
  

  

  1. 
  St. 
  Malo 
  : 
  Boulenger. 
  

  

  2. 
  Copenhagen 
  : 
  Liitken. 
  

  

  3. 
  Vienna 
  : 
  Wernen. 
  

   4, 
  8. 
  Naples 
  : 
  Monticelli. 
  

  

  5. 
  Paris: 
  Boulenger. 
  

  

  6. 
  Lolland 
  : 
  Liitken. 
  

  

  7. 
  Warsaw 
  : 
  Wrzeniowski. 
  

  

  The 
  range 
  of 
  variation 
  of 
  the 
  somewhat 
  complex 
  

   assemblage 
  which 
  I 
  have 
  endeavoured 
  to 
  define 
  as 
  the 
  

   typical 
  form 
  is 
  very 
  great 
  indeed, 
  and 
  forms 
  a 
  gradu- 
  

   ated 
  series 
  leading 
  from 
  the 
  form 
  ridibunda 
  to 
  the 
  

   form 
  lessonse. 
  I 
  must 
  confess 
  that 
  the 
  line 
  drawn 
  

  

  