﻿RH1N0STIGMA 
  273 
  

  

  GENUS 
  VII. 
  *RHINOSTIGMA. 
  OWL-FACED 
  GUENON. 
  

  

  A- 
  2— 
  2> 
  *" 
  1—1' 
  r 
  * 
  2—2* 
  iV1 
  * 
  3—3 
  & 
  ' 
  

  

  White 
  line 
  from 
  forehead 
  over 
  nose 
  and 
  lip 
  to 
  mouth. 
  Shape 
  of 
  

   face 
  elongate 
  ovate, 
  similar 
  to 
  that 
  of 
  the 
  Barn 
  Owl. 
  The 
  last 
  lower 
  

   molar, 
  with 
  a 
  posterior 
  fifth 
  cusp. 
  Facial 
  line 
  of 
  skull 
  hollowed 
  ; 
  pre- 
  

   maxillaries 
  protuberant 
  ; 
  zygomatic 
  arch 
  slightly 
  above 
  alveolar 
  border 
  

   of 
  molars. 
  

  

  Rhinostigma 
  hamlyni 
  (Pocock). 
  

  

  Cercopithecus 
  hamlyni 
  Pocock, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  XX, 
  7th 
  

   Ser., 
  1907, 
  p. 
  521 
  ; 
  Id. 
  Proc. 
  Zool. 
  Soc. 
  Lond., 
  1908, 
  p. 
  160, 
  pi. 
  

   X, 
  fig. 
  3. 
  

  

  HAMLYN'S 
  OR 
  OWL-FACED 
  GUENON. 
  

  

  Type 
  locality. 
  Ituri 
  forests, 
  Congo 
  State, 
  Africa. 
  Type 
  living 
  

   in 
  the 
  Gardens 
  of 
  the 
  Zoological 
  Society 
  of 
  London, 
  (1909). 
  

  

  Color. 
  A 
  white 
  stripe 
  from 
  forehead 
  down 
  nose 
  and 
  across 
  upper 
  

   lip 
  to 
  mouth; 
  a 
  pale 
  yellowish 
  superciliary 
  stripe 
  tinged 
  with 
  gray; 
  

   whiskers 
  long 
  extending 
  to 
  ears 
  bushy, 
  and 
  with 
  top 
  of 
  head 
  and 
  

   entire 
  upper 
  parts 
  black 
  speckled 
  with 
  yellow 
  ; 
  thighs 
  gray 
  ; 
  arms, 
  legs 
  

   and 
  entire 
  under 
  parts 
  black; 
  tail 
  very 
  long, 
  gray, 
  hairs 
  being 
  black 
  

   tipped 
  with 
  silvery 
  white 
  ; 
  hands 
  and 
  feet 
  black 
  ; 
  face 
  lead 
  color 
  ; 
  ears 
  

   yellow. 
  Ex 
  type 
  living 
  in 
  Gardens 
  of 
  the 
  London 
  Zoological 
  Society. 
  

  

  Measurements. 
  Skull: 
  total 
  length, 
  occiput 
  to 
  base 
  of 
  incisors, 
  

   105; 
  occipito-nasal 
  length, 
  92; 
  intertemporal 
  width, 
  50; 
  Hensel, 
  64; 
  

   zygomatic 
  width, 
  68; 
  median 
  length 
  of 
  nasals, 
  16; 
  palatal 
  length, 
  37; 
  

   length 
  of 
  upper 
  molar 
  series, 
  28; 
  length 
  of 
  mandible, 
  68; 
  length 
  of 
  

   lower 
  molar 
  series, 
  31. 
  Incisors 
  very 
  large 
  in 
  both 
  jaws. 
  Ex 
  type 
  

   Tring 
  Museum. 
  

  

  I 
  am 
  indebted 
  to 
  the 
  Hon. 
  Walter 
  Rothschild, 
  and 
  Dr. 
  Hartert 
  

   who 
  very 
  kindly 
  forwarded 
  the 
  type 
  skull 
  to 
  me 
  for 
  examination 
  from 
  

   the 
  former's 
  Museum, 
  at 
  Tring, 
  England. 
  

  

  In 
  size 
  this 
  monkey 
  is 
  about 
  equal 
  to 
  C. 
  albigularis. 
  It 
  is 
  a 
  

   remarkable 
  species 
  both 
  for 
  the 
  long 
  stripe 
  down 
  the 
  nose 
  and 
  lip, 
  as 
  

   well 
  as 
  for 
  the 
  peculiar 
  shape 
  of 
  the 
  face, 
  which 
  is 
  broad 
  at 
  the 
  fore- 
  

   head 
  and 
  narrowing 
  down 
  to 
  the 
  chin, 
  like 
  that 
  of 
  the 
  barn 
  owl, 
  the 
  

  

  *pivoa 
  f 
  nose, 
  and 
  tnyfia, 
  a 
  mark. 
  

  

  