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  BRACHYTELEUS 
  

  

  M. 
  E. 
  Geoffroy 
  St. 
  Hilaire. 
  From 
  unwise 
  exposure 
  to 
  light 
  for 
  over 
  a 
  

   century 
  it 
  is 
  now 
  nearly 
  white 
  having 
  lost 
  practically 
  all 
  its 
  coloring, 
  

   a 
  little 
  on 
  sides 
  of 
  head 
  and 
  neck, 
  and 
  on 
  hands 
  and 
  feet, 
  being 
  all 
  that 
  

   remains 
  of 
  the 
  hues 
  formerly 
  existing. 
  Of 
  course 
  it 
  no 
  longer 
  serves 
  

   for 
  a 
  description 
  of 
  the 
  species, 
  and 
  I 
  have 
  availed 
  myself 
  for 
  that 
  pur- 
  

   pose 
  of 
  the 
  numerous 
  specimens 
  in 
  the 
  British 
  Museum. 
  It 
  is 
  much 
  

   to 
  be 
  regretted 
  that 
  all 
  the 
  Mammalian 
  types 
  of 
  the 
  Primates 
  in 
  the 
  

   Paris 
  Museum 
  are 
  deteriorating 
  from 
  the 
  same 
  cause, 
  and 
  in 
  a 
  

   comparatively 
  brief 
  time 
  will 
  probably 
  be 
  useless 
  for 
  comparison 
  or 
  

   description. 
  Examples 
  of 
  this 
  species 
  have 
  been 
  described 
  at 
  various 
  

   times 
  under 
  different 
  names 
  as 
  distinct 
  from 
  each 
  other 
  on 
  account 
  

   of 
  the 
  presence 
  of 
  an 
  undeveloped 
  thumb, 
  or 
  sometimes 
  merely 
  a 
  

   tubercle, 
  or 
  its 
  absence 
  altogether. 
  These, 
  however, 
  have 
  no 
  specific 
  

   value, 
  and 
  individuals 
  have 
  been 
  found 
  with 
  the 
  nailed 
  thumb 
  on 
  one 
  

   hand 
  and 
  the 
  tubercle 
  on 
  the 
  other, 
  or 
  the 
  tubercle 
  has 
  been 
  present 
  and 
  

   the 
  thumb 
  absent 
  from 
  the 
  other 
  hand. 
  There 
  seems 
  to 
  be 
  no 
  regu- 
  

   larity 
  for 
  the 
  presence 
  or 
  absence 
  of 
  these 
  members, 
  but 
  they 
  merely 
  

   exhibit 
  individual 
  peculiarities. 
  

  

  The 
  type 
  of 
  Brachyteleus 
  macrotarsus 
  Spix 
  is 
  in 
  the 
  Munich 
  

   Museum. 
  It 
  is 
  very 
  much 
  discolored 
  with 
  dust 
  and 
  greatly 
  faded, 
  but 
  

   there 
  is 
  no 
  doubt 
  that 
  it 
  is 
  the 
  same 
  as 
  Geoffroy's 
  species, 
  and 
  

   Spix's 
  name 
  must 
  become 
  a 
  synonym. 
  

  

  