﻿196 
  On 
  a 
  new 
  Dormouse 
  from 
  Northern 
  Nigeria. 
  

  

  XVII. 
  — 
  A 
  new 
  Dormouse 
  from 
  Northern 
  Nigeria, 
  presented 
  

   \ 
  to 
  the 
  British 
  Museum 
  hy 
  J. 
  C. 
  Fox, 
  Esq. 
  By 
  GuY 
  

   DOLLMAN. 
  

  

  (Published 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum.) 
  

  

  Graphiurus 
  foxi, 
  sp. 
  n. 
  

  

  A 
  modium-sized 
  species 
  allied 
  to 
  Oraphiurus 
  lorraineus, 
  

   Dolliii., 
  from 
  which 
  it 
  is 
  distinguished 
  bj 
  its 
  less 
  richly 
  

   coloured 
  coat 
  and 
  smaller 
  teeth. 
  

  

  Dimensions 
  of 
  body 
  and 
  hind 
  feet 
  greater 
  than 
  in 
  ior- 
  

   raineus. 
  Greneral 
  texture 
  and 
  length 
  of 
  hair 
  as 
  in 
  the 
  Welle 
  

   River 
  form. 
  Colour 
  of 
  dorsal 
  surface 
  dull 
  greyish 
  brown 
  ; 
  

   general 
  effect 
  as 
  in 
  G. 
  spurrelli, 
  Dollm. 
  Dark 
  rings 
  around 
  

   eyes 
  not 
  markedly 
  developed. 
  Cheeks 
  greyish 
  white, 
  hairs 
  

   with 
  slate-grey 
  bases 
  and 
  white 
  tips. 
  liacks 
  of 
  hands 
  and 
  

   I'eet 
  dirty 
  white. 
  Ventral 
  surface 
  of 
  body 
  slate-grey, 
  washed 
  

   with 
  white. 
  Tall 
  pale 
  liver-brown. 
  

  

  Skull 
  rather 
  smaller 
  than 
  that 
  of 
  lorraineus, 
  with 
  narrower 
  

   nasals 
  and 
  interorbital 
  region; 
  auditory 
  bullte 
  less 
  inflated 
  

   and 
  cheek-teeth 
  considerably 
  smaller. 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  in 
  tlie 
  flesh) 
  : 
  — 
  

  

  Head 
  and 
  body 
  83 
  mm. 
  ; 
  tail 
  58 
  ; 
  hind 
  foot 
  13 
  ; 
  

   ear 
  15. 
  

  

  Skull: 
  greatest 
  length 
  25'1 
  ; 
  basilar 
  length 
  18*7 
  ; 
  condylo- 
  

   incisive 
  length 
  22 
  ; 
  zygomatic 
  breadth 
  14*2 
  ; 
  interorbital 
  

   constriction 
  3*7; 
  squamosal 
  breadth 
  of 
  brain-case 
  11*5; 
  

   length 
  of 
  nasals 
  9*3; 
  greatest 
  width 
  across 
  nasals 
  2'8 
  ; 
  

   ])alatilar 
  length 
  7*7; 
  length 
  of 
  palatal 
  foramina 
  2*5; 
  length 
  

   of 
  upper 
  cheek-teeth 
  2'8. 
  

  

  Hah. 
  Kabwir, 
  Bauchi 
  Province, 
  Northern 
  Nigeria. 
  Alti- 
  

   tude 
  2500 
  feet. 
  

  

  Ttipe. 
  Adult 
  female. 
  B.M. 
  no. 
  13.5.15.1. 
  Original 
  

   number 
  58. 
  Collected 
  and 
  presented 
  by 
  J. 
  C. 
  Fox, 
  Esq. 
  

  

  This 
  Nigerian 
  dormouse 
  is 
  distinguished 
  from 
  its 
  nearest 
  

   ally, 
  G. 
  lorraineus, 
  by 
  its 
  less 
  richly 
  coloured 
  pelage 
  and 
  

   smaller 
  cheek-teeth. 
  The 
  genus 
  has 
  not 
  hitherto 
  been 
  

   recorded 
  from 
  Northern 
  Nigeria 
  ; 
  G. 
  hueli, 
  Roch., 
  and 
  

   G. 
  crassicaudatus 
  dorotheoe, 
  Dollm., 
  both 
  members 
  of 
  very 
  

   different 
  groups, 
  are 
  the 
  only 
  other 
  Nigerian 
  species, 
  and 
  

   these 
  do 
  not 
  appear 
  to 
  occur 
  north 
  of 
  the 
  Southern 
  Nigerian 
  

   boundary. 
  

  

  