﻿592 
  On 
  new 
  African 
  Rodents. 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  in 
  flesh) 
  : 
  — 
  

  

  Head 
  and 
  body 
  85 
  mm.; 
  tail 
  102 
  ; 
  hind 
  foot 
  17; 
  ear 
  11. 
  

  

  Skull 
  : 
  greatest 
  length 
  24 
  - 
  l 
  ; 
  condylo-incisive 
  length 
  21*7 
  ; 
  

   nasals 
  7'7; 
  interorbital 
  breadth 
  4*6; 
  breadth 
  of 
  brain-case 
  

   11*6; 
  palatilar 
  length 
  10*6 
  ; 
  diastema 
  7; 
  palatal 
  foramina 
  5*1; 
  

   upper 
  molar 
  series 
  4*5. 
  

  

  Hob. 
  Bitye, 
  Ja 
  River, 
  S.E. 
  Cameroons. 
  

  

  Type. 
  Adult 
  female. 
  B.M. 
  no. 
  11. 
  5. 
  5. 
  11. 
  Original 
  

   number 
  517. 
  Collected 
  29th 
  October, 
  1910, 
  by 
  Mr. 
  G. 
  L. 
  

   Bates. 
  Another, 
  younger, 
  specimen 
  obtained 
  in 
  1901 
  at 
  

   Efulen, 
  Cameroons. 
  

  

  Like 
  as 
  this 
  pretty 
  little 
  mouse 
  is 
  to 
  E. 
  alleni 
  and 
  E. 
  stella 
  

   externally, 
  the 
  resemblance 
  is 
  only 
  superficial, 
  and 
  its 
  large 
  

   JVyctomys-Wke 
  brain-case, 
  well-defined 
  supraorbital 
  ridges, 
  

   and 
  larger 
  molars 
  separate 
  it 
  readily 
  from 
  those 
  species. 
  

  

  Georychus 
  kummi, 
  sp. 
  n. 
  

  

  Near 
  G. 
  ochraceo-cinereus. 
  

  

  General 
  external 
  appearance 
  as 
  in 
  G. 
  lechei. 
  Size 
  rather 
  

   smaller. 
  Fur 
  of 
  medium 
  length 
  ; 
  hairs 
  of 
  back 
  about 
  7 
  mm. 
  

   Colour 
  slaty 
  grey, 
  rather 
  less 
  brown 
  than 
  in 
  G. 
  lechei, 
  not 
  

   in 
  any 
  way 
  sandy 
  or 
  " 
  ochraceous." 
  Coronal 
  white 
  spot 
  

   smaller 
  than 
  in 
  lechei, 
  and 
  not 
  extended 
  posteriorly 
  as 
  a 
  white 
  

   line 
  on 
  the 
  nape. 
  Belly 
  with 
  a 
  white 
  median 
  line. 
  

  

  Skull 
  very 
  much 
  as 
  in 
  G. 
  ochraceo-cinereus, 
  smaller 
  than 
  

   that 
  of 
  G. 
  lechei; 
  nasals 
  not 
  expanded 
  mesially, 
  their 
  sides 
  

   parallel 
  from 
  front 
  nearly 
  to 
  back 
  ; 
  orbits 
  defined 
  behind 
  by 
  

   strongly 
  marked 
  postorbital 
  processes, 
  interorbital 
  breadth 
  

   slightly 
  less 
  than 
  intertemporal. 
  Lambdoid 
  crest 
  well 
  

   developed, 
  continued 
  directly 
  across 
  skull 
  without 
  the 
  median 
  

   anterior 
  inflection 
  so 
  marked 
  in 
  lechei. 
  Postero-external 
  

   angles 
  of 
  zygomata 
  strongly 
  marked. 
  Diastema 
  compara- 
  

   tively 
  short. 
  Bull«3 
  small. 
  

  

  Dimensions 
  of 
  the 
  type 
  : 
  — 
  

  

  Hind 
  foot 
  (s. 
  u.) 
  29 
  mm. 
  

  

  Skull 
  : 
  condylo-basal 
  length 
  42'4 
  ; 
  condylo-incisive 
  length 
  

   44*6 
  ; 
  zygomatic 
  breadth 
  31*5 
  ; 
  nasals 
  15*2 
  x 
  3*2 
  ; 
  inter- 
  

   orbital 
  breadth 
  9; 
  breadth 
  across 
  postorbital 
  processes 
  13; 
  

   intertemporal 
  breadth 
  9'2 
  ; 
  mastoid 
  breadth 
  20*8 
  ; 
  palatilar 
  

   length 
  24*7 
  ; 
  diastema 
  12*6 
  ; 
  upper 
  tooth-series 
  (crowns) 
  7 
  - 
  7. 
  

  

  Hal. 
  French 
  Shari 
  Protectorate, 
  about 
  8° 
  N., 
  22° 
  E., 
  on 
  

   the 
  Ironstone 
  Plateau. 
  Alt. 
  2000'. 
  

  

  Type. 
  Old 
  female. 
  B.M. 
  no. 
  11. 
  4. 
  2. 
  1. 
  Collected 
  and 
  

   presented 
  by 
  Dr. 
  H. 
  Karl 
  W. 
  Kumm, 
  of 
  the 
  Soudan 
  United 
  

   Mission. 
  

  

  