﻿208 
  Mr. 
  0. 
  Thomas 
  on 
  

  

  type, 
  without 
  postero-internal 
  cusp 
  (cusp 
  7 
  or 
  x 
  cusp), 
  the 
  

   lamina? 
  simple, 
  not 
  corrugated. 
  

  

  Type. 
  H. 
  margarettce 
  (Mus 
  margarettce, 
  Thos.). 
  

  

  Other 
  species: 
  — 
  H. 
  pusillus 
  {Mus 
  margarettce 
  pusillus, 
  

   Thos., 
  1893) 
  and 
  H. 
  minahassai, 
  Tlios. 
  

  

  This 
  genus, 
  whose 
  peculiarities 
  have 
  been 
  already 
  fully 
  

   detailed 
  in 
  the 
  descriptions 
  of 
  the 
  species, 
  seems 
  to 
  bear 
  in 
  

   Borneo 
  to 
  CJdropodomys 
  something 
  of 
  the 
  same 
  sort 
  of 
  rela- 
  

   tionship 
  that 
  in 
  Africa 
  the 
  Thamnomtjs-Y\ke 
  mice 
  do 
  to 
  true 
  

   Thamnomys 
  ; 
  but 
  the 
  difference 
  between 
  the 
  two 
  is 
  greater 
  

   and 
  more 
  sharply 
  defined, 
  and 
  the 
  generic 
  distinction 
  of 
  

   Hceromys 
  from 
  Epimys 
  indubitable. 
  

  

  The 
  asserted 
  resemblance 
  of 
  the 
  feet 
  of 
  //. 
  minahassce 
  to 
  

   those 
  of 
  "Mus" 
  as 
  given 
  in 
  the 
  original 
  description, 
  seems 
  to 
  

   have 
  been 
  due 
  to 
  the 
  specimen 
  being 
  a 
  dried 
  skin, 
  so 
  that 
  

   their 
  structure 
  could 
  not 
  be 
  easily 
  made 
  out. 
  They 
  appear 
  

   to 
  be 
  much 
  the 
  same 
  as 
  in 
  //. 
  margarettce. 
  

  

  Uromys 
  obiensis, 
  sp. 
  n. 
  

  

  A 
  medium-sized 
  species, 
  with 
  white 
  belly. 
  

  

  Size 
  rather 
  less 
  than 
  in 
  U. 
  brwjnii. 
  Fur 
  thick, 
  soft, 
  and 
  

   woolly 
  ; 
  wool-hairs 
  of 
  back 
  about 
  11 
  mm. 
  in 
  length. 
  General 
  

   colour 
  above 
  dark 
  clay-colour, 
  more 
  tawny 
  on 
  crown 
  and 
  

   rump, 
  clearer 
  and 
  more 
  buffy 
  on 
  sides. 
  Under 
  surface 
  and 
  

   inner 
  sides 
  of 
  limbs 
  pure 
  white 
  to 
  the 
  bases 
  of 
  the 
  hairs, 
  but 
  

   the 
  white 
  area 
  somewhat 
  narrowed 
  on 
  the 
  belly. 
  Face 
  

   greyish 
  brown. 
  Ears 
  short, 
  naked, 
  dull 
  brown. 
  Hands 
  and 
  

   feet 
  thinly 
  haired, 
  almost 
  naked, 
  white 
  or 
  flesh-coloured. 
  

   Tail 
  rather 
  long 
  in 
  proportion, 
  dark 
  brown, 
  a 
  few 
  fine 
  scattered 
  

   bristles 
  upon 
  it; 
  rings 
  of 
  scales 
  about 
  14 
  to 
  the 
  centimetre. 
  

  

  Skull 
  of 
  about 
  normal 
  height; 
  supraorbital 
  edges 
  little 
  

   developed. 
  Palatal 
  foramina 
  unusually 
  prolonged 
  backwards, 
  

   their 
  posterior 
  end 
  almost 
  level 
  with 
  the 
  front 
  of 
  the 
  anterior 
  

   root 
  of 
  to 
  1 
  . 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  in 
  skin) 
  : 
  — 
  

  

  Head 
  and 
  body 
  142 
  mm.; 
  tail 
  154; 
  hind 
  foot 
  (wet) 
  28; 
  

   ear 
  (wet) 
  14. 
  

  

  Skull 
  : 
  nasals 
  11'3 
  ; 
  interorbital 
  breadth 
  5*6; 
  height 
  from 
  

   supraorbital 
  ledge 
  to 
  alveolus 
  of 
  to 
  2 
  9*3 
  ; 
  palatilar 
  length 
  16 
  ; 
  

   diastema 
  9*2; 
  palatal 
  foramina 
  6'1 
  ; 
  length 
  of 
  upper 
  molar 
  

   series 
  6*4. 
  

  

  Hob. 
  Obi 
  Island. 
  

  

  Type. 
  Adult 
  female. 
  B.M. 
  no. 
  3. 
  4. 
  10. 
  1. 
  Collected 
  

   29th 
  April, 
  1902, 
  by 
  Mr. 
  Waterstradt. 
  

  

  This 
  species 
  represents 
  the 
  farthest 
  western 
  extension 
  of 
  

  

  