﻿Dr. 
  D. 
  G. 
  Elliot's 
  'Revieio 
  of 
  the 
  Primates.' 
  391 
  

  

  the 
  range, 
  and, 
  this 
  being 
  the 
  case, 
  vai-iation 
  (which 
  may 
  be^ 
  

   and 
  often 
  is, 
  due 
  to 
  the 
  locality) 
  is 
  liable 
  to 
  be 
  ascribed 
  to 
  

   sex 
  or 
  age 
  or 
  to 
  individual 
  variability, 
  which 
  in 
  this 
  group, 
  

   more 
  especially 
  as 
  regards 
  cranial 
  characters, 
  is 
  wider 
  than 
  

   in 
  most 
  other 
  orders. 
  

  

  The 
  argument 
  as 
  regards 
  the 
  use 
  of 
  binomial 
  nomenclature 
  

   for 
  insular 
  races 
  is 
  much 
  used 
  by 
  American 
  naturalists, 
  but 
  

   appears 
  to 
  us, 
  if 
  only 
  on 
  account 
  of 
  convenience, 
  to 
  be 
  quite 
  

   untenable. 
  

  

  In 
  addition, 
  it 
  ignores 
  the 
  factor 
  of 
  time, 
  which 
  is 
  quite 
  as 
  

   important 
  as 
  locality 
  in 
  developing 
  new 
  races. 
  A 
  mammal, 
  

   isolated 
  on 
  an 
  island, 
  may 
  rapidly 
  alter 
  from 
  the 
  form 
  found, 
  

   on 
  adjacent 
  islands 
  or 
  mainland 
  ; 
  but 
  it 
  will 
  be 
  conceded 
  

   that 
  at 
  a 
  time, 
  possibly 
  very 
  recent, 
  speaking 
  geologically, 
  

   when 
  the 
  island 
  was 
  stocked, 
  the 
  relatively 
  different 
  dis- 
  

   position 
  of 
  land 
  and 
  sea 
  may 
  have 
  permitted 
  the 
  free 
  

   commingling 
  of 
  the 
  parent 
  forms, 
  and 
  that 
  at 
  the 
  best 
  the 
  

   modern 
  insular 
  races 
  are 
  merely 
  the 
  terminal 
  twigs 
  of 
  a 
  much- 
  

   branched 
  tree. 
  

  

  The 
  larger 
  mammals 
  are, 
  of 
  course, 
  apparently 
  less 
  variable, 
  

   because, 
  as 
  compared 
  with 
  the 
  smaller 
  quickly 
  breeding 
  

   forms, 
  their 
  races, 
  in 
  terms 
  of 
  generations, 
  are 
  much 
  

   younger. 
  

  

  It 
  is, 
  moreover, 
  a 
  very 
  significant 
  fact, 
  that 
  in 
  related 
  

   groups 
  of 
  the 
  same 
  geims, 
  only 
  those 
  separated 
  by 
  deep 
  sea 
  

   from 
  other 
  forms 
  develop, 
  as 
  a 
  rule, 
  other 
  than 
  the 
  most 
  

   tJ'ivial 
  differential 
  characters. 
  

  

  Had 
  the 
  author 
  been 
  at 
  the 
  trouble 
  to 
  show 
  by 
  means 
  of 
  

   trinomials 
  the 
  relationships 
  of 
  the 
  various 
  forms 
  to 
  each 
  

   other, 
  we 
  should 
  have 
  had 
  a 
  more 
  valuable 
  and 
  instructive 
  

   work 
  than 
  is 
  actually 
  the 
  case 
  ; 
  while, 
  if 
  pains 
  had 
  been 
  

   taken 
  to 
  apply 
  the 
  synonymy 
  of 
  the 
  older 
  writers 
  to 
  the 
  

   actual 
  forms 
  to 
  which 
  it 
  refers, 
  many 
  apparent 
  misstatements 
  

   and 
  contradictions 
  would 
  have 
  been 
  avoided. 
  As 
  it 
  is 
  

   Dr. 
  Elliotts 
  jumble 
  of 
  species 
  is, 
  if 
  anything, 
  worse 
  than 
  his 
  

   jumble 
  of 
  localities. 
  

  

  We 
  do 
  not 
  propose 
  to 
  deal 
  with 
  other 
  than 
  species 
  

   occurring 
  in 
  the 
  Malayan 
  region, 
  but 
  there 
  is 
  no 
  reason 
  to 
  

   suppose 
  that 
  the 
  sections 
  dealing 
  with 
  the 
  African 
  and 
  Neo- 
  

   tropical 
  genera 
  are 
  of 
  a 
  higher 
  standard 
  than 
  that 
  on 
  which 
  

   we 
  are 
  in 
  a 
  position 
  to 
  offer 
  comments. 
  

  

  Genus 
  Nycticebus. 
  (Vol. 
  I. 
  p. 
  21.) 
  

  

  The 
  name 
  Nycticebus 
  tenasserimensis 
  (p. 
  25) 
  has 
  been 
  

   applied 
  to 
  a 
  reproduction 
  by 
  Blanford 
  ^ 
  of 
  a 
  drawing 
  by 
  

  

  * 
  ' 
  Fauna 
  of 
  British 
  India 
  : 
  Mammalia,' 
  1888-91, 
  pp. 
  45, 
  4G, 
  fig. 
  12. 
  

  

  