﻿94 
  CEBUS 
  

  

  on 
  rump, 
  rest 
  of 
  body 
  fulvous 
  or 
  yellowish 
  fulvous, 
  becoming 
  grayish 
  

   on 
  shoulders, 
  flanks, 
  and 
  hinder 
  part 
  of 
  arms 
  and 
  thighs 
  ; 
  limbs 
  yellow, 
  

   the 
  legs 
  strongly 
  tinged 
  with 
  golden 
  ; 
  hands 
  and 
  feet 
  yellowish 
  brown 
  ; 
  

   under 
  parts 
  yellowish 
  gray, 
  but 
  most 
  of 
  the 
  hair 
  gone 
  ; 
  tail 
  reddish 
  burl 
  

   above, 
  at 
  base 
  like 
  rump 
  but 
  paler; 
  beneath 
  sooty 
  gray. 
  Albinistic 
  

   individual. 
  Ex 
  type 
  Paris 
  Museum. 
  

  

  Measurements. 
  Skull: 
  Not 
  the 
  type. 
  Occipito-nasal 
  length, 
  88; 
  

   Hensel, 
  65 
  ; 
  zygomatic 
  width, 
  71 
  ; 
  intertemporal 
  width, 
  40 
  ; 
  median 
  

   length 
  of 
  nasals, 
  10; 
  length 
  of 
  upper 
  molar 
  series, 
  21 
  ; 
  length 
  of 
  

   mandible, 
  63 
  ; 
  length 
  of 
  lower 
  molar 
  series, 
  25. 
  

  

  The 
  above 
  describes 
  Geoffroy's 
  type 
  as 
  it 
  is 
  to-day, 
  much 
  faded 
  

   in 
  color 
  and 
  soiled 
  with 
  dust. 
  Originally 
  it 
  was 
  probably 
  of 
  a 
  general 
  

   golden 
  yellow 
  color, 
  with 
  a 
  brown 
  head, 
  and 
  tinged 
  with 
  red 
  on 
  rump 
  

   and 
  back. 
  The 
  present 
  gray 
  hues 
  are 
  probably 
  derived 
  from 
  the 
  dust 
  

   that 
  has 
  settled 
  upon 
  the 
  fur. 
  

  

  The 
  type 
  of 
  C. 
  barbatus 
  Geoff., 
  is 
  also 
  in 
  the 
  Paris 
  Museum 
  and 
  , 
  

   is 
  referable 
  to 
  C. 
  flavus. 
  It 
  is 
  not 
  quite 
  so 
  greatly 
  faded 
  on 
  one 
  side 
  

   of 
  the 
  body, 
  and 
  is 
  of 
  a 
  general 
  yellowish 
  brown 
  hue, 
  the 
  top 
  of 
  the 
  

   head 
  being 
  almost 
  a 
  cream 
  color, 
  and 
  a 
  slight 
  golden 
  shade 
  on 
  occiput 
  

   and 
  neck; 
  the 
  hind 
  limbs 
  are 
  somewhat 
  darker 
  than 
  typical 
  flavus, 
  

   but 
  the 
  differences 
  perceptible 
  after 
  all 
  these 
  years, 
  it 
  has 
  been 
  in 
  the 
  

   Museum 
  since 
  1812, 
  are 
  only 
  such 
  as 
  the 
  variability 
  of 
  the 
  species 
  and 
  

   the 
  deterioration 
  of 
  the 
  specimen 
  could 
  easily 
  produce. 
  One 
  side 
  of 
  

   the 
  type 
  is 
  paler 
  than 
  the 
  other. 
  The 
  skulls 
  unfortunately 
  are 
  in 
  the 
  

   examples 
  and 
  no 
  opportunity 
  is 
  therefore 
  afforded 
  for 
  ascertaining 
  if 
  

   any 
  cranial 
  differences 
  exist. 
  Mindful 
  of 
  the 
  great 
  variations 
  existing 
  

   among 
  nearly 
  all 
  the 
  species 
  of 
  Cebus, 
  uniting 
  these 
  specimens 
  in 
  one 
  

   species 
  seems 
  to 
  be 
  the 
  proper 
  course 
  to 
  pursue. 
  

  

  Cebus 
  castaneus 
  I. 
  Geoffroy. 
  

  

  Cebus 
  castaneus 
  I. 
  Geoff., 
  Cat. 
  Primates, 
  1851, 
  p. 
  46; 
  Wagn., 
  

   Schreb., 
  Saugth. 
  Suppl., 
  V, 
  1855, 
  p. 
  97; 
  Dahlb., 
  Stud. 
  Zool. 
  

   Fam. 
  Reg. 
  Anim. 
  Nat., 
  fasc. 
  I, 
  1856, 
  pp. 
  164, 
  168. 
  

   Cebus 
  apella 
  (nee 
  Linn.), 
  Schleg., 
  Mus. 
  Pays-Bas, 
  Simiae, 
  1876, 
  

  

  p. 
  199. 
  

   Type 
  locality. 
  Cayenne. 
  Type 
  one 
  of 
  two 
  in 
  Paris 
  Museum. 
  

   Genl. 
  Char. 
  Size 
  large, 
  tail 
  very 
  long, 
  black 
  on 
  crown 
  a 
  mere 
  

   stripe, 
  greater 
  part 
  of 
  forehead 
  yellowish 
  white. 
  

  

  Color. 
  Head 
  yellowish 
  white, 
  triangular 
  small 
  black 
  patch 
  on 
  

   middle 
  of 
  crown, 
  extending 
  as 
  a 
  mere 
  thread 
  to 
  the 
  forehead; 
  above 
  

   ears 
  and 
  nape 
  reddish 
  chestnut; 
  upper 
  parts 
  of 
  body 
  and 
  hind 
  limbs 
  

  

  