﻿RAN 
  A. 
  291 
  

  

  from 
  the 
  snout 
  to 
  above 
  the 
  vent, 
  and 
  the 
  brown 
  or 
  

   black 
  spots 
  often 
  run 
  together 
  to 
  form 
  a 
  dark 
  stripe 
  

   on 
  each 
  side 
  of 
  the 
  light 
  one, 
  and 
  one 
  or 
  two 
  others 
  

   on 
  each 
  side 
  of 
  the 
  body. 
  Contrary 
  to 
  a 
  statement 
  

   made 
  by 
  Ley 
  dig 
  in 
  1891, 
  a 
  light 
  spot 
  on 
  the 
  vertex, 
  

   corresponding 
  to 
  the 
  frontal 
  gland, 
  may 
  be 
  very 
  distinct, 
  

   as 
  well 
  marked 
  as 
  in 
  any 
  specimen 
  of 
  Bana 
  temporaria, 
  

   and 
  much 
  more 
  than 
  in 
  B. 
  esculenta 
  and 
  B. 
  agilis. 
  

  

  Lower 
  parts 
  white, 
  often 
  yellow 
  near 
  the 
  groin, 
  

   immaculate, 
  or 
  the 
  throat 
  and 
  breast 
  spotted 
  with 
  

   brown 
  or 
  greyish, 
  or 
  with 
  red 
  in 
  the 
  females 
  ; 
  in 
  the 
  

   latter 
  some 
  red 
  spots 
  may 
  be 
  scattered 
  on 
  the 
  belly. 
  

  

  Males 
  distinguished 
  by 
  a 
  shorter 
  body, 
  much 
  

   stronger 
  fore 
  limbs, 
  a 
  large 
  pad 
  on 
  the 
  inner 
  finger, 
  

   and 
  a 
  pair 
  of 
  internal 
  vocal 
  sacs. 
  During 
  the 
  breeding 
  

   season 
  the 
  pad 
  on 
  the 
  inner 
  finger, 
  together 
  with 
  the 
  

   inner 
  surface 
  of 
  the 
  last 
  phalanx, 
  covered 
  with 
  black 
  

   horny 
  spinules 
  as 
  in 
  B. 
  temporaria, 
  and 
  the 
  skin 
  like- 
  

   wise 
  swollen 
  with 
  lymph, 
  often 
  assuming 
  a 
  uniform 
  

   pale 
  blue 
  or 
  bluish 
  colour 
  on 
  the 
  upper 
  surfaces 
  and 
  on 
  

   the 
  throat. 
  The 
  web 
  between 
  the 
  toes 
  is 
  then 
  much 
  

   developed, 
  with 
  rectilinear 
  or 
  even 
  convex 
  outline, 
  and 
  

   reaches 
  the 
  tips 
  of 
  the 
  third 
  and 
  fifth 
  toes. 
  Females 
  

   during 
  the 
  breeding 
  season 
  develop 
  pearl-like 
  excres- 
  

   cences 
  on 
  the 
  sides 
  and 
  limbs, 
  which 
  are, 
  however, 
  

   less 
  developed 
  than 
  in 
  B. 
  temporaries. 
  

  

  The 
  remarkable 
  colour-dimorphism 
  exhibited 
  by 
  this 
  

   species, 
  an 
  exact 
  parallel 
  of 
  that 
  observed 
  in 
  Disco- 
  

   glossus 
  pictus, 
  often 
  occurs 
  promiscuously, 
  as, 
  for 
  

   instance, 
  near 
  Berlin, 
  where 
  I 
  have 
  found 
  the 
  two 
  

   forms 
  in 
  nearly 
  equal 
  abundance 
  in 
  the 
  same 
  localities. 
  

   But 
  this 
  is 
  not 
  always 
  the 
  case, 
  for 
  Westhoff 
  has 
  

   observed 
  in 
  Westphalia 
  the 
  striped 
  form 
  to 
  be 
  alone 
  

   present 
  in 
  certain 
  bogs, 
  whilst 
  other 
  drier 
  stations 
  

   yield 
  exclusively 
  or 
  principally 
  the 
  spotted 
  form. 
  The 
  

   latter 
  is 
  also 
  the 
  only 
  one 
  that 
  has 
  yet 
  been 
  found 
  in 
  

   Norway, 
  and 
  is 
  by 
  far 
  the 
  more 
  abundant 
  in 
  Denmark, 
  

   whilst 
  in 
  Sweden 
  both 
  seem 
  to 
  be 
  about 
  equally 
  

   represented. 
  

  

  