﻿LASIOPYGA 
  357 
  

  

  to 
  all 
  this 
  part; 
  upper 
  parts 
  of 
  body 
  to 
  tail 
  much 
  redder, 
  speckled 
  

   ochraceous 
  rufous 
  and 
  black, 
  becoming 
  darker 
  towards 
  root 
  of 
  tail 
  

   where 
  the 
  speckling 
  is 
  less 
  ; 
  flanks 
  gray, 
  speckled 
  on 
  apical 
  half 
  of 
  hairs 
  

   with 
  yellow 
  and 
  black; 
  outer 
  side 
  of 
  arms 
  and 
  hands 
  black, 
  speckled 
  

   to 
  elbows 
  with 
  cream 
  color 
  ; 
  legs 
  pale 
  gray, 
  speckled 
  with 
  white 
  ; 
  feet, 
  

   posterior 
  half 
  speckled 
  gray 
  and 
  white, 
  anterior 
  half 
  and 
  toes 
  black; 
  

   whiskers 
  yellowish 
  gray 
  annulated 
  at 
  tip 
  with 
  black 
  and 
  yellow 
  ; 
  entire 
  

   under 
  parts 
  and 
  inner 
  side 
  of 
  limbs 
  whitish 
  yellow; 
  tail 
  above 
  black, 
  

   beneath 
  yellowish 
  with 
  black 
  mixed, 
  and 
  grading 
  into 
  black 
  towards 
  

   the 
  tip 
  ; 
  ear 
  tufts 
  buff". 
  Ex 
  type 
  British 
  Museum. 
  

  

  Measurements. 
  Total 
  length, 
  1,295; 
  tail, 
  705; 
  foot, 
  115, 
  (skin). 
  

   Skull 
  : 
  total 
  length, 
  90 
  ; 
  occipito-nasal 
  length, 
  78.3 
  ; 
  intertemporal 
  width, 
  

   37.6; 
  Hensel, 
  54.8; 
  zygomatic 
  width, 
  56.2; 
  width 
  of 
  braincase, 
  51.1; 
  

   median 
  length 
  of 
  nasals, 
  16.5; 
  palatal 
  length, 
  31; 
  length 
  of 
  upper 
  

   molar 
  series, 
  23 
  ; 
  length 
  of 
  mandible, 
  56.3 
  ; 
  length 
  of 
  lower 
  molar 
  

   series, 
  26.7. 
  Ex 
  type 
  British 
  Museum. 
  

  

  The 
  specimens 
  from 
  Gaboon 
  are 
  much 
  paler 
  than 
  those 
  from 
  the 
  

   Benito 
  River 
  even 
  when 
  examples 
  of 
  the 
  same 
  sex 
  are 
  compared. 
  

   The 
  head, 
  upper 
  part 
  of 
  back, 
  legs 
  and 
  under 
  parts 
  of 
  body 
  are 
  much 
  

   paler 
  in 
  their 
  different 
  colors, 
  and 
  the 
  dorsal 
  region 
  is 
  paler 
  and 
  

   brighter, 
  appearing 
  more 
  red, 
  and 
  there 
  is 
  an 
  absence 
  of 
  clear 
  black 
  

   at 
  root 
  of 
  tail, 
  the 
  speckling 
  of 
  the 
  back 
  continuing 
  to 
  the 
  tail. 
  There 
  

   exist 
  several 
  points 
  of 
  difference 
  in 
  cranial 
  characters, 
  which, 
  if 
  

   sustained 
  by 
  a 
  number 
  of 
  individuals, 
  would 
  be 
  sufficient 
  to 
  give 
  to 
  this 
  

   form 
  specific 
  rank. 
  On 
  comparing 
  the 
  skull 
  of 
  the 
  type 
  with 
  that 
  of 
  

   a 
  female 
  from 
  the 
  Benito 
  River, 
  the 
  great 
  difference 
  in 
  the 
  superior 
  

   outline 
  is 
  seen. 
  In 
  the 
  Gaboon 
  skull 
  there 
  is 
  an 
  abrupt 
  rise 
  of 
  the 
  

   frontal 
  from 
  the 
  posterior 
  base 
  of 
  the 
  orbital 
  ridge, 
  with 
  a 
  gradual 
  

   curve 
  to 
  the 
  fronto-parietal 
  suture, 
  which 
  then 
  drops 
  more 
  than 
  a 
  45° 
  

   angle 
  to 
  the 
  occipital. 
  The 
  skull 
  of 
  this 
  female 
  from 
  the 
  Benito 
  River 
  

   has 
  a 
  flat 
  frontal 
  on 
  a 
  line 
  with 
  the 
  orbital 
  ridge, 
  and 
  descends 
  much 
  

   more 
  rapidly 
  from 
  the 
  fronto-parietal 
  suture 
  to 
  the 
  occipital; 
  the 
  

   anterior 
  portion 
  of 
  the 
  nasals 
  in 
  the 
  type 
  is 
  nearly 
  at 
  a 
  right 
  angle 
  to 
  

   the 
  posterior 
  portion, 
  the 
  projecting 
  forward 
  occurring 
  at 
  about 
  mid- 
  

   way 
  their 
  length, 
  causing 
  the 
  narial 
  opening 
  to 
  be 
  horizontal 
  save 
  for 
  

   its 
  anterior 
  third; 
  the 
  rostrum 
  of 
  the 
  Gaboon 
  specimen 
  is 
  narrower; 
  

   the 
  palate 
  is 
  narrower 
  and 
  deeper, 
  and 
  the 
  molar 
  series 
  are 
  longer 
  by 
  

   the 
  width 
  of 
  a 
  molar 
  tooth 
  ; 
  the 
  zygomatic 
  arches 
  are 
  different 
  in 
  shape, 
  

   that 
  of 
  the 
  type 
  curving 
  rapidly 
  inward 
  anteriorly, 
  while 
  those 
  of 
  the 
  

   San 
  Benito 
  River 
  examples 
  are 
  straight 
  for 
  nearly 
  their 
  whole 
  length. 
  

  

  