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  LAGOTHRIX 
  

  

  blue 
  or 
  silver 
  gray 
  hues 
  so 
  characteristic 
  of 
  L. 
  lagotricha, 
  and 
  the 
  

   red 
  of 
  L. 
  cana 
  is 
  absent 
  altogether. 
  The 
  specimen 
  is 
  a 
  female. 
  

  

  Lagothrix 
  ubericola 
  Elliot. 
  

  

  Lagothrix 
  ubericola 
  Elliot, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  IV, 
  8th 
  Ser., 
  

   1909, 
  p. 
  246. 
  

  

  Type 
  locality. 
  Barrigudo, 
  River 
  Jurua, 
  Upper 
  Amazon. 
  Type 
  in 
  

   British 
  Museum. 
  

  

  Geogr. 
  Distr. 
  Upper 
  Amazon, 
  Rio 
  Solimoens 
  and 
  Rio 
  Jurua, 
  

   Peru. 
  

  

  Genl. 
  Char. 
  Color 
  pale 
  ; 
  hair 
  soft, 
  rather 
  short, 
  buff 
  at 
  base. 
  

  

  Color. 
  Top 
  of 
  head 
  to 
  nape, 
  inner 
  side 
  of 
  hands 
  and 
  feet 
  black 
  ; 
  

   upper 
  parts 
  of 
  body, 
  and 
  arms 
  to 
  elbows 
  grizzled 
  wood 
  brown, 
  with 
  

   a 
  reddish 
  tinge 
  on 
  rump 
  and 
  thighs, 
  the 
  hairs 
  being 
  buff 
  at 
  base, 
  with 
  

   a 
  subterminal 
  black 
  ring 
  and 
  whitish 
  tips 
  ; 
  outer 
  side 
  of 
  forearms 
  iron 
  

   gray; 
  tops 
  of 
  legs 
  to 
  knees 
  iron 
  gray, 
  when 
  the 
  color 
  becomes 
  blackish 
  

   brown 
  ; 
  the 
  hairs 
  with 
  yellow 
  tips 
  on 
  the 
  fingers 
  and 
  toes, 
  which 
  are 
  

   black; 
  flanks 
  and 
  sides 
  of 
  abdomen 
  yellowish 
  brown; 
  chest 
  and 
  middle 
  

   of 
  abdomen 
  black; 
  hairs 
  of 
  tail 
  above 
  like 
  upper 
  side 
  of 
  legs, 
  tawny 
  

   ochraceous 
  with 
  black 
  and 
  white 
  rings 
  and 
  white 
  tips 
  ; 
  beneath 
  rufous 
  

   brown 
  at 
  base, 
  rest 
  black. 
  Ex 
  type 
  British 
  Museum. 
  

  

  Measurements. 
  About 
  the 
  size 
  of 
  L. 
  lagotricha 
  but 
  more 
  

   slender 
  in 
  body. 
  Skull: 
  total 
  length, 
  116.6; 
  occipito-nasal 
  length, 
  103; 
  

   zygomatic 
  width, 
  65.7; 
  intertemporal 
  width, 
  59.5; 
  palatal 
  length, 
  30; 
  

   breadth 
  of 
  braincase, 
  61.5; 
  median 
  length 
  of 
  nasals, 
  10.6; 
  length 
  of 
  

   upper 
  molar 
  series, 
  25.2 
  ; 
  length 
  of 
  mandible, 
  69 
  ; 
  length 
  of 
  lower 
  molar 
  

   series, 
  29. 
  Ex 
  type 
  in 
  British 
  Museum. 
  

  

  The 
  type 
  in 
  the 
  British 
  Museum 
  is 
  from 
  the 
  Jurua 
  River, 
  Upper 
  

   Amazon, 
  Brazil. 
  It 
  is 
  full 
  grown 
  but 
  not 
  an 
  old 
  adult. 
  It 
  differs 
  

   markedly 
  from 
  L. 
  lagotricha 
  in 
  color, 
  and 
  as 
  the 
  young 
  of 
  that 
  

   species 
  resemble 
  the 
  adults, 
  these 
  cannot 
  be 
  considered 
  as 
  possessing 
  

   immature 
  coats 
  and 
  therefore 
  are 
  not 
  to 
  be 
  regarded 
  as 
  representing 
  

   the 
  same 
  species. 
  The 
  locality 
  of 
  these 
  specimens 
  is 
  south 
  of 
  the 
  

   range 
  of 
  L. 
  lagotricha. 
  It 
  is 
  not 
  so 
  large 
  as 
  the 
  last 
  named 
  species, 
  

   is 
  more 
  slenderly 
  built, 
  and 
  its 
  very 
  light 
  color, 
  a 
  grizzled 
  wood 
  brown, 
  

   makes 
  it 
  conspicuously 
  different 
  from 
  all 
  the 
  other 
  members 
  of 
  the 
  

   genus. 
  The 
  type 
  is 
  unique. 
  

  

  Lagothrix 
  cana 
  (Humboldt). 
  

  

  Simia 
  cana 
  Humb., 
  Rec. 
  Obs. 
  Zool., 
  I, 
  1811, 
  (1815), 
  p. 
  354. 
  

   Lagothrix 
  cana 
  E. 
  Geoff., 
  Ann. 
  Mus. 
  Hist. 
  Nat. 
  Paris, 
  XIX, 
  1812. 
  

  

  