﻿44 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.86 
  

  

  black. 
  The 
  inner 
  surfaces 
  of 
  fore 
  limbs 
  are 
  noticeably 
  lighter 
  than 
  

   the 
  outer 
  and 
  also 
  somewhat 
  lighter 
  than 
  chest. 
  The 
  hairs 
  on 
  hands 
  

   and 
  feet 
  are 
  lighter 
  at 
  the 
  base 
  than 
  at 
  the 
  tip. 
  The 
  hairs 
  on 
  the 
  

   forehead 
  project 
  forward 
  as 
  on 
  the 
  type 
  specimen. 
  

  

  Skull. 
  — 
  Similar 
  to 
  that 
  of 
  panamensis. 
  

  

  Measureme^its. 
  — 
  An 
  adult 
  male 
  (type 
  of 
  cueuUatiis) 
  : 
  Head 
  and 
  

   body, 
  431±mm.; 
  tail, 
  698; 
  hind 
  foot, 
  159 
  (fkle 
  Murie, 
  1866, 
  op. 
  cit., 
  p. 
  

   T39). 
  jSkuIl: 
  Immature 
  specimen 
  from 
  Chepigana: 
  Greatest 
  length, 
  

   103; 
  orbital 
  breadth, 
  52.3; 
  postorbital 
  constriction, 
  47.6; 
  width 
  of 
  

   brain 
  case, 
  55.6 
  ; 
  zygomatic 
  breadth, 
  60 
  ; 
  maxillary 
  tooth 
  row, 
  26.8.- 
  

  

  Remarks. 
  — 
  A 
  somewhat 
  grizzled 
  spider 
  monkey 
  obtained 
  by 
  E. 
  

   Greey, 
  an 
  officer 
  on 
  the 
  Eoyal 
  West-Indian 
  Mail 
  Co.'s 
  steamship 
  

   Shannon 
  at 
  St. 
  Thomas, 
  Virgin 
  Islands, 
  for 
  the 
  Zoological 
  Society 
  of 
  

   London 
  became 
  the 
  basis 
  of 
  A. 
  grisescens 
  of 
  Gray. 
  After 
  the 
  death 
  of 
  

   the 
  animal, 
  the 
  skin 
  and 
  skull 
  were 
  acquired 
  by 
  the 
  British 
  Museum 
  

   (Natural 
  History), 
  and 
  the 
  skin 
  was 
  compared 
  by 
  Sclater 
  (Proc. 
  Zool. 
  

   Soc. 
  London 
  for 
  1871, 
  pt. 
  1, 
  p. 
  223, 
  June 
  1871) 
  with 
  the 
  skin 
  of 
  a 
  some- 
  

   what 
  similar 
  half 
  -grown 
  male 
  purchased 
  from 
  a 
  London 
  dealer 
  in 
  1869. 
  

   This 
  specimen, 
  also 
  evidently 
  of 
  unknown 
  native 
  origin, 
  he 
  regarded 
  

   as 
  probably 
  identical. 
  The 
  type 
  of 
  this 
  spider 
  monkey, 
  according 
  to 
  

   Elliot 
  (A 
  Review 
  of 
  the 
  Primates, 
  vol. 
  2, 
  p. 
  37, 
  June 
  1913), 
  is 
  entirely 
  

   black 
  except 
  for 
  the 
  yellowish-brown 
  tint 
  of 
  the 
  underside 
  of 
  the 
  tail, 
  

   but 
  intermixed 
  with 
  the 
  hairs 
  of 
  the 
  upperparts 
  are 
  long, 
  gray 
  silvery 
  

   or 
  golden 
  hairs. 
  The 
  latter 
  are 
  not 
  sufficiently 
  numerous 
  to 
  affect 
  the 
  

   general 
  blackish 
  coloration 
  except 
  on 
  the 
  shoulders, 
  lower 
  back, 
  and 
  

   the 
  limbs 
  where 
  the 
  hairs 
  are 
  yellow 
  or 
  golden 
  at 
  the 
  base. 
  

  

  The 
  type 
  of 
  cucullatus^ 
  a 
  male 
  now 
  in 
  the 
  British 
  Museum 
  (Natural 
  

   History), 
  had 
  a 
  small 
  tubercle 
  representing 
  the 
  thumb, 
  and 
  Sclater 
  

   {op. 
  cit..f 
  1871, 
  p. 
  224) 
  remarked 
  that 
  he 
  had 
  "some 
  reason 
  to 
  suppose 
  

   it 
  may 
  be 
  from 
  the 
  northern 
  coast 
  of 
  Colombia, 
  as 
  ... 
  a 
  black 
  spider 
  

   monkey 
  with 
  long 
  hair 
  over 
  its 
  head 
  is 
  occasionally 
  brought 
  for 
  sale 
  

   into 
  Cartagena." 
  

  

  Attention 
  is 
  here 
  directed 
  to 
  two 
  black-handed 
  spider 
  monkeys 
  fig- 
  

   ured 
  by 
  Sclater 
  {op. 
  cH.^ 
  1875, 
  pi. 
  49), 
  which 
  were 
  received 
  likewise 
  

   from 
  officers 
  of 
  the 
  West 
  Indian 
  Mail 
  Co. 
  The 
  color 
  of 
  the 
  face 
  and 
  

   nose 
  closely 
  resembles 
  that 
  described 
  for 
  grisesoens^ 
  and 
  in 
  addition 
  the 
  

   distal 
  black 
  color 
  of 
  the 
  hairs 
  on 
  the 
  upperparts 
  does 
  not 
  entirely 
  con- 
  

   ceal 
  the 
  yellowish 
  basal 
  color 
  of 
  these 
  hairs. 
  If 
  these 
  specimens 
  are 
  

   correctly 
  allocated 
  to 
  grisescens, 
  it 
  would 
  seem 
  that 
  this 
  spider 
  monkey 
  

   is 
  subject 
  to 
  considerable 
  variation 
  in 
  external 
  appearance. 
  Owing 
  to 
  

   the 
  lack 
  of 
  adequate 
  material 
  for 
  study 
  the 
  status 
  of 
  this 
  form 
  remains 
  

   uncertain. 
  

  

  Specimens 
  examined. 
  — 
  Total 
  number, 
  2, 
  as 
  follows 
  : 
  Panama 
  : 
  Che- 
  

   pigana, 
  Darien, 
  1 
  (M. 
  C. 
  Z.) 
  No 
  definite 
  locality, 
  1 
  (yg., 
  A. 
  M. 
  N. 
  H.) 
  . 
  

  

  • 
  Hindermost 
  molar 
  has 
  not 
  erupted. 
  

  

  