﻿ATELEUS 
  47 
  

  

  frighten 
  it 
  to 
  turn 
  its 
  back, 
  when 
  it 
  would 
  have 
  seized 
  it. 
  The 
  monkey, 
  

   however, 
  kept 
  its 
  face 
  to 
  the 
  foe, 
  and 
  the 
  eagle 
  did 
  not 
  care 
  to 
  engage 
  

   with 
  it 
  in 
  this 
  position, 
  but 
  probably 
  would 
  have 
  tired 
  it 
  out. 
  Velasquez 
  

   fired 
  at 
  the 
  eagle, 
  and 
  frightened 
  it 
  away. 
  I 
  think 
  it 
  likely, 
  from 
  what 
  

   I 
  have 
  seen 
  of 
  the 
  habits 
  of 
  this 
  monkey, 
  that 
  they 
  defend 
  themselves 
  

   from 
  its 
  attack 
  by 
  keeping 
  two 
  or 
  three 
  together, 
  thus 
  assisting 
  each 
  

   other, 
  and 
  it 
  is 
  only 
  when 
  the 
  eagle 
  finds 
  one 
  separated 
  from 
  its 
  com- 
  

   panions 
  that 
  it 
  dares 
  to 
  attack 
  it." 
  

  

  Ateleus 
  hybridus 
  I. 
  Geoffroy. 
  

  

  Ateles 
  ( 
  !) 
  hybridus 
  I. 
  Geoff., 
  Mem. 
  Mus. 
  Hist 
  Nat., 
  Paris, 
  XVII, 
  

   1829, 
  p. 
  168 
  ; 
  Id. 
  fitudes 
  Zool., 
  1832, 
  p. 
  1, 
  pi. 
  I 
  ; 
  Id. 
  Mag. 
  Zool., 
  

   1832, 
  p. 
  1, 
  pi. 
  I; 
  Id. 
  Cat. 
  Primates, 
  1851, 
  p. 
  49; 
  Less., 
  Spec. 
  

   Mamm., 
  1840, 
  p. 
  129; 
  Wagn., 
  Schreb., 
  Saugth. 
  SuppL 
  I, 
  

   1840, 
  p. 
  201 
  ; 
  V, 
  1855, 
  p. 
  79 
  ; 
  Dahlb., 
  Stud. 
  Zool. 
  Fam. 
  Reg. 
  

   Anim. 
  Natur., 
  fasc. 
  I, 
  1856, 
  pp. 
  171, 
  172: 
  Schleg., 
  Mus. 
  Pays- 
  

   Bas, 
  Simise, 
  1876, 
  p. 
  183. 
  

  

  Sapajou 
  marginatus 
  Slack, 
  Proc. 
  Acad. 
  Nat. 
  Scien. 
  Phil., 
  1862, 
  

   p. 
  512. 
  

  

  Eriodes 
  hybridus 
  Reichenb., 
  Vollstand. 
  Naturg. 
  Affen, 
  1862, 
  p. 
  r7 
  . 
  

   figs. 
  136, 
  137. 
  

  

  HYBRID 
  SPIDER 
  MONKEY. 
  

  

  Type 
  locality. 
  Valley 
  of 
  the 
  Magdalena, 
  Colombia. 
  Type 
  in 
  

   Paris 
  Museum. 
  

  

  Geogr. 
  Distr. 
  Valley 
  of 
  the 
  Magdalena, 
  Colombia. 
  

  

  Genl. 
  Char. 
  Triangular 
  white 
  mark 
  on 
  forehead. 
  

  

  Color. 
  Face 
  black, 
  white 
  triangular 
  spot 
  on 
  the 
  forehead, 
  the 
  

   lower 
  point 
  reaching 
  each 
  eye 
  ; 
  top 
  and 
  sides 
  of 
  head 
  and 
  nape 
  blackish 
  

   brown 
  ; 
  shoulders, 
  arms, 
  legs, 
  hands 
  and 
  feet 
  also 
  blackish 
  brown, 
  but 
  

   not 
  quite 
  so 
  dark 
  as 
  the 
  head 
  ; 
  upper 
  parts 
  of 
  body 
  pale 
  or 
  ashy 
  brown 
  ; 
  

   under 
  parts 
  of 
  body 
  and 
  inner 
  side 
  of 
  limbs 
  grayish 
  white; 
  tail 
  

   blackish 
  brown 
  same 
  color 
  as 
  outer 
  side 
  of 
  limbs. 
  

  

  Measurements. 
  Skull 
  : 
  total 
  length, 
  109 
  ; 
  occipito-nasal 
  length, 
  92 
  ; 
  

   Hensel, 
  75 
  ; 
  zygomatic 
  width, 
  65 
  ; 
  palatal 
  length, 
  51 
  ; 
  breadth 
  of 
  brain- 
  

   case, 
  59; 
  median 
  length 
  of 
  nasals, 
  15 
  ; 
  length 
  of 
  upper 
  molar 
  series, 
  23 
  : 
  

   length 
  of 
  mandible, 
  70; 
  length 
  of 
  lower 
  molar 
  series, 
  29. 
  Paris 
  

   Museum, 
  possibly 
  the 
  type, 
  as 
  it 
  bears 
  the 
  date, 
  1820, 
  procured 
  by 
  M. 
  

   Plee. 
  

  

  The 
  above 
  description 
  was 
  taken 
  from 
  an 
  example 
  presented 
  to 
  

   the 
  Paris 
  Museum 
  by 
  M. 
  Baron 
  and 
  stated 
  to 
  have 
  come 
  from 
  

   Colombia. 
  Several 
  specimens 
  are 
  in 
  the 
  collection, 
  and 
  it 
  does 
  not 
  stem 
  

  

  