﻿Mammals 
  from 
  British 
  East 
  Africa. 
  529 
  

  

  Dimensions 
  of 
  type 
  (measured 
  in 
  the 
  flesh) 
  : 
  — 
  

  

  Head 
  and 
  body 
  120 
  mm.; 
  tail 
  185; 
  hind 
  foot 
  25; 
  

   ear 
  22. 
  

  

  Skull: 
  greatest 
  length 
  32*5; 
  basilar 
  length 
  25*5 
  ; 
  condylo- 
  

   basilar 
  length 
  27 
  # 
  5 
  ; 
  condylo-incisive 
  length 
  29*7; 
  zygomatic 
  

   breadth 
  14*7 
  ; 
  interorbital 
  breadth 
  4*5 
  ; 
  breadth 
  of 
  brain- 
  

   case 
  (across 
  squamosal 
  region) 
  13 
  ; 
  length 
  of 
  nasals 
  12 
  ; 
  

   palatilar 
  length 
  14; 
  post-palatilar 
  length 
  11*7 
  ; 
  width 
  of 
  

   palate 
  (inside 
  m 
  1 
  ) 
  2*5 
  ; 
  length 
  of 
  palatal 
  foramina 
  7*4 
  ; 
  

   length 
  of 
  upper 
  cheek-teeth 
  4 
  - 
  7. 
  

  

  Hah. 
  South 
  face 
  of 
  Mt. 
  Elgon. 
  Altitude 
  9000 
  feet. 
  

  

  Type. 
  Mult 
  female. 
  B.M. 
  no. 
  10.4. 
  1. 
  186. 
  Original 
  

   number 
  433. 
  Collected 
  on 
  November 
  13th, 
  1909. 
  

  

  I 
  have 
  taken 
  for 
  the 
  type 
  of 
  this 
  new 
  form 
  a 
  specimen 
  

   from 
  a 
  series 
  collected 
  by 
  Mr. 
  Kemp 
  in 
  1909 
  on 
  Mt. 
  Elgon 
  ; 
  

   the 
  only 
  adult 
  Rumruti 
  example 
  has 
  an 
  imperfect 
  skull, 
  but 
  

   it 
  undoubtedly 
  is 
  the 
  same 
  form 
  as 
  that 
  found 
  at 
  Elgon. 
  

  

  The 
  bright 
  tawny 
  colour 
  of 
  the 
  dorsal 
  surface 
  and 
  buffy 
  

   tint 
  on 
  the 
  flanks 
  readily 
  distinguish 
  this 
  race 
  from 
  

   T. 
  ibeanus, 
  a 
  species 
  that 
  is 
  noted 
  for 
  its 
  dull 
  olive-coloured 
  

   pelage. 
  T. 
  surdaster 
  polionops, 
  Osg., 
  a 
  more 
  southern 
  race 
  

   related 
  to 
  this 
  Elgon 
  form, 
  is 
  less 
  tawny 
  on 
  the 
  sides 
  of 
  the 
  

   face 
  and 
  flanks 
  ; 
  and 
  the 
  general 
  colour 
  of 
  the 
  dorsal 
  surface, 
  

   although 
  distinctly 
  reddish, 
  is 
  a 
  good 
  deal 
  lighter. 
  

  

  T. 
  surdaster 
  e/gonis, 
  Thos., 
  geographically 
  the 
  nearest 
  

   ally 
  of 
  T. 
  s. 
  insignis, 
  is 
  far 
  paler 
  and 
  yellower 
  in 
  colour 
  and 
  

   smaller 
  in 
  size. 
  

  

  T. 
  loringi, 
  described 
  by 
  Heller 
  in 
  1909 
  from 
  Lake 
  Nai- 
  

   vasha, 
  is 
  apparently 
  quite 
  unlike 
  any 
  other 
  known 
  member 
  

   of 
  the 
  genus, 
  possessing 
  dark 
  facial 
  stripes 
  (like 
  those 
  of 
  

   Epimys 
  nigricaudd) 
  and 
  slate-grey 
  bases 
  to 
  the 
  hairs 
  of 
  the 
  

   belly. 
  As 
  regards 
  T. 
  surdaster, 
  the 
  general 
  colour 
  of 
  the 
  

   dorsal 
  surface 
  and 
  flanks 
  is 
  brighter 
  and 
  rather 
  lighter 
  in 
  

   colour 
  than 
  in 
  this 
  new 
  form, 
  a 
  character 
  that 
  is 
  especially 
  

   noticeable 
  on 
  the 
  shoulders, 
  neck, 
  and 
  head. 
  In 
  addition, 
  

   T. 
  surdaster 
  is 
  a 
  rather 
  smaller 
  animal, 
  the 
  hind 
  foot 
  

   measuring 
  only 
  22 
  mm. 
  in 
  length. 
  

  

  Lophuromys 
  zena, 
  Dollm. 
  

  

  S 
  . 
  1524, 
  1529, 
  1546, 
  1551, 
  1558, 
  1560, 
  1573, 
  1574, 
  1576, 
  

   1586, 
  1653; 
  ? 
  . 
  1525, 
  1547, 
  1552, 
  1559, 
  1563, 
  1575, 
  1635, 
  

   1649. 
  Solai, 
  Mt. 
  Kenia. 
  

  

  This 
  series 
  of 
  specimens 
  is 
  quite 
  similar 
  to 
  the 
  series 
  from 
  

   the 
  Aberdare 
  Mountains, 
  the 
  type 
  locality. 
  

  

  Ann. 
  & 
  Mag. 
  N. 
  Hist. 
  Ser. 
  8. 
  Vol. 
  vii. 
  35 
  

  

  