﻿CEBUS 
  73 
  

  

  A 
  list 
  is 
  here 
  given 
  of 
  the 
  species 
  recognized 
  by 
  the 
  Author 
  in 
  

   the 
  British 
  Museum. 
  They 
  are 
  arranged 
  in 
  six 
  groups 
  accord- 
  

   ing 
  as 
  the 
  hair 
  of 
  the 
  crown 
  is 
  directed, 
  or 
  forms 
  a 
  crest. 
  I. 
  

   "Hairs 
  of 
  the 
  crown 
  reflexed, 
  bent 
  back 
  around 
  the 
  face, 
  

   forming 
  a 
  short 
  crest 
  over 
  each 
  eyebrow." 
  II. 
  "Hairs 
  of 
  the 
  

   crown 
  bent 
  back, 
  those 
  on 
  the 
  sides 
  of 
  the 
  dark 
  crown 
  spot 
  

   elongate 
  in 
  the 
  perfect 
  state 
  forming 
  two 
  more 
  or 
  less 
  erect 
  

   crests 
  or 
  tufts." 
  III. 
  "Hairs 
  of 
  the 
  crown 
  short, 
  reflexed, 
  

   adpressed, 
  not 
  forming 
  any 
  crest." 
  IV. 
  "Hairs 
  of 
  the 
  crown 
  

   of 
  the 
  head 
  elongate, 
  erect, 
  forming 
  a 
  single 
  central 
  more 
  or 
  

   less 
  conical 
  crest." 
  V. 
  "Hairs 
  of 
  the 
  crown 
  radiating 
  from 
  a 
  

   center; 
  directed 
  forward 
  in 
  front, 
  and 
  forming, 
  with 
  the 
  

   eyebrows, 
  a 
  transverse 
  crest." 
  VI. 
  "Hairs 
  of 
  the 
  crown 
  

   elongate, 
  erect, 
  diverging 
  in 
  all 
  directions, 
  forming 
  a 
  kind 
  of 
  

   cup." 
  Under 
  No. 
  I, 
  one 
  species 
  only 
  is 
  placed, 
  C. 
  leucogenys 
  

   Gray, 
  = 
  C. 
  cirrifer 
  (Humb.). 
  With 
  No. 
  II, 
  are 
  arranged, 
  

   C. 
  apella 
  I. 
  Geoff., 
  a 
  composite 
  of 
  C. 
  apella 
  (Linn.), 
  and 
  C. 
  

   fatuellus 
  (Linn.) 
  ; 
  C. 
  elegans 
  E. 
  Geoff., 
  which 
  he 
  says 
  = 
  

   C. 
  pallidus 
  Gray, 
  not 
  then 
  described, 
  but 
  Geoffroy's 
  animal 
  = 
  

   C. 
  azasje 
  Rengg. 
  ; 
  C. 
  cirrifer 
  (Humb.); 
  C. 
  vellerosus 
  I. 
  

   Geoff. 
  No. 
  Ill, 
  has 
  C. 
  capucinus 
  I. 
  Geoff., 
  (nee 
  Linn.), 
  = 
  C. 
  

   apella 
  (Linn.) 
  ; 
  C. 
  xanthocephalus 
  Spix, 
  = 
  C. 
  variegatus; 
  C. 
  

   variegatus 
  E. 
  Geoff 
  . 
  ; 
  C. 
  albifrons 
  (Humb.) 
  ; 
  C. 
  hypoleucus 
  

   = 
  C. 
  capucinus 
  (Linn.) 
  ; 
  C. 
  leucocephalus 
  Gray 
  = 
  C. 
  albi- 
  

   frons 
  (Humb.) 
  ; 
  C. 
  Havescens 
  Gray, 
  = 
  C. 
  unicolor 
  Spix. 
  No. 
  

   IV, 
  includes 
  C. 
  robustus 
  = 
  C. 
  variegatus 
  Geoff.; 
  C. 
  

   annellatus 
  Gray, 
  = 
  C. 
  apella 
  (Linn.). 
  No. 
  V, 
  has 
  C. 
  chry- 
  

   sopus 
  F. 
  Cuv. 
  ; 
  C. 
  subcristatus 
  Gray, 
  = 
  C. 
  variegatus 
  Geoff., 
  

   juv. 
  No. 
  VI, 
  contains 
  only 
  C. 
  capillatus 
  Gray, 
  = 
  C. 
  variegatus 
  

   I. 
  Geoff., 
  juv. 
  If 
  the 
  manner 
  in 
  which 
  the 
  hair 
  on 
  the 
  crown 
  

   was 
  directed 
  had 
  been 
  considered 
  from 
  living 
  animals, 
  it 
  

   might 
  be 
  deemed 
  of 
  more 
  importance 
  as 
  a 
  character, 
  but 
  in 
  

   this 
  instance 
  many 
  of 
  Gray's 
  specimens 
  were 
  badly 
  prepared, 
  

   and 
  the 
  hairs 
  greatly 
  disarranged, 
  and 
  in 
  some 
  cases 
  at 
  least, 
  

   gave 
  a 
  very 
  imperfect 
  and 
  doubtless 
  erroneous 
  idea 
  of 
  how 
  it 
  

   was 
  worn 
  during 
  the 
  life 
  of 
  the 
  animal, 
  and 
  therefore 
  was 
  

   not 
  to 
  be 
  relied 
  upon. 
  Gray's 
  knowledge 
  of 
  the 
  species 
  of 
  

   Cebus 
  was 
  derived 
  chiefly 
  from 
  the 
  examples 
  in 
  the 
  British 
  

   Museum, 
  and 
  he 
  nowhere 
  states 
  that 
  he 
  had 
  ever 
  examined 
  a 
  

   single 
  type 
  of 
  other 
  Mammalogists, 
  and 
  in 
  view 
  of 
  the 
  many 
  

   errors 
  in 
  his 
  list, 
  his 
  remarks 
  at 
  the 
  beginning 
  of 
  his 
  article 
  

  

  