﻿CLASS 
  MAMMALIA. 
  

  

  ORDER 
  ANTHROPOIDEA. 
  

  

  FAMILY 
  CEBID/E. 
  

  

  Subfamily 
  Aotinae. 
  

  

  GENUS 
  AOTTJS. 
  THE 
  DOUROUCOULIS. 
  

  

  t 
  M> 
  C. 
  jEi; 
  P. 
  g 
  5 
  M. 
  S 
  = 
  36. 
  

  

  AOTES 
  Humboldt, 
  Rec. 
  Obs. 
  Zool. 
  et 
  Anat. 
  Comp., 
  1811, 
  (1815), 
  

   pp. 
  306-311, 
  358, 
  (for 
  Aotus), 
  pi. 
  XXVIII. 
  Type 
  Simla 
  

   trivirgata 
  Humboldt. 
  

  

  Nyctipithecus 
  Spix, 
  Simiar. 
  et 
  Vespert. 
  Bras., 
  1823, 
  p. 
  25. 
  

  

  Nocthora 
  F. 
  Cuv., 
  Hist. 
  Nat. 
  Mamm, 
  V, 
  1824, 
  livr. 
  XLIII, 
  pi. 
  

  

  Head 
  round; 
  body 
  short, 
  thick; 
  face 
  encircled 
  by 
  a 
  ruff; 
  ears 
  

   short, 
  mostly 
  hidden 
  in 
  the 
  fur 
  ; 
  nostrils 
  separated 
  by 
  a 
  broad 
  septum 
  ; 
  

   eyes 
  very 
  large 
  ; 
  tail 
  bushy, 
  the 
  length 
  moderate. 
  Skull 
  : 
  orbits 
  large, 
  

   approximate, 
  supported 
  by 
  a 
  bony 
  wall 
  ; 
  upper 
  incisors 
  broad, 
  subequal 
  ; 
  

   canines 
  long; 
  lower 
  incisors 
  projecting 
  forward; 
  first 
  upper 
  premolar 
  

   very 
  long; 
  last 
  upper 
  molar 
  tricuspidate 
  ; 
  hands 
  and 
  feet 
  small; 
  the 
  

   semi-opposable 
  thumb 
  and 
  great 
  toe 
  weak. 
  Dorsal 
  and 
  lumbar 
  verte- 
  

   brae, 
  twenty-two. 
  

  

  The 
  Douroucoulis, 
  as 
  the 
  species 
  of 
  Aotus 
  are 
  generally 
  called, 
  

   are 
  small 
  animals 
  with 
  round 
  heads 
  and 
  large 
  eyes, 
  and 
  a 
  short 
  face 
  

   surrounded 
  by 
  a 
  ruff 
  of 
  lengthened 
  hairs. 
  The 
  coat 
  is 
  rather 
  soft 
  and 
  

   fluffy 
  in 
  texture, 
  the 
  tail 
  of 
  medium 
  length, 
  inclined 
  to 
  be 
  bushy, 
  and 
  

   non-prehensile. 
  These 
  animals 
  are 
  nocturnal 
  and 
  arboreal 
  ; 
  seldom 
  seen 
  

   during 
  the 
  day, 
  hiding 
  themselves 
  amid 
  the 
  thick 
  foliage, 
  or 
  in 
  holes 
  

   of 
  the 
  trees, 
  but 
  at 
  night 
  are 
  very 
  active 
  and 
  noisy, 
  uttering 
  loud 
  

   'caterwaulings,' 
  and 
  roaming 
  about 
  in 
  search 
  of 
  food 
  which 
  consists 
  

   of 
  insects, 
  fruit, 
  and 
  small 
  birds 
  when 
  they 
  are 
  fortunate 
  enough 
  

   to 
  seize 
  one. 
  The 
  Indians 
  call 
  them 
  'Devil 
  Monkeys,' 
  and 
  being 
  natu- 
  

   rally 
  of 
  a 
  delicate 
  constitution, 
  they 
  do 
  not 
  live 
  long 
  in 
  captivity. 
  

  

  