﻿new 
  African 
  Rodents. 
  591 
  

  

  Skull 
  decidedly 
  larger 
  than 
  that 
  of 
  E. 
  alleni, 
  the 
  brain- 
  

   case 
  much 
  longer, 
  but 
  not, 
  as 
  is 
  the 
  case 
  in 
  the 
  next 
  species, 
  

   much 
  broader. 
  Supraorbital 
  edges 
  square, 
  but 
  without 
  

   beading. 
  Palatal 
  foramina 
  longer 
  than 
  in 
  E. 
  alleni, 
  ami 
  

   bul 
  he 
  larger. 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  as 
  a 
  spirit-specimen 
  

   before 
  skinning) 
  : 
  — 
  

  

  Head 
  and 
  body 
  77 
  mm. 
  ; 
  tail 
  140 
  ; 
  hind 
  foot 
  17*5 
  ; 
  ear 
  15. 
  

  

  Skull 
  : 
  greatest 
  length 
  24"8 
  ; 
  oondylo-incisive 
  length 
  23*1 
  ; 
  

   zygomatic 
  breadth 
  12 
  "3 
  ; 
  na-als 
  8"2 
  ; 
  interorbital 
  breadtli 
  4*3 
  ; 
  

   breadth 
  of 
  brain-case 
  11*2 
  ; 
  palatilar 
  length 
  10'G 
  ; 
  palatal 
  

   foramina 
  5'1 
  ; 
  upper 
  molar 
  series 
  4. 
  

  

  Hah. 
  Congo 
  and 
  Cameroons. 
  Type 
  from 
  the 
  Ituri 
  Forest 
  

   between 
  Mawarnbi 
  and 
  Avakubi, 
  Eastern 
  Congo. 
  Others 
  

   from 
  Efulen 
  and 
  Ja 
  River, 
  Cameroons. 
  

  

  Type. 
  Adult 
  female. 
  B.M. 
  no. 
  7. 
  1. 
  2. 
  23. 
  Collected 
  in 
  

   1906* 
  by 
  R. 
  B. 
  Woosnam, 
  and 
  presented 
  by 
  the 
  Subscribers 
  

   to 
  the 
  Ruwenzori 
  Expedition. 
  

  

  Compared 
  with 
  the 
  true 
  E. 
  alleni 
  of 
  Fernando 
  Po 
  (of 
  

   which 
  the 
  Fernando 
  Po 
  Expedition 
  of 
  1904 
  obtained 
  an 
  adult 
  

   topotype 
  clearly 
  identical 
  with 
  the 
  young 
  type 
  of 
  the 
  species) 
  

   this 
  mainland 
  form 
  is 
  markedly 
  larger, 
  with 
  a 
  longer 
  brain- 
  

   case, 
  and 
  has 
  not 
  the 
  disproportionally 
  short 
  muzzle 
  of 
  that 
  

   form. 
  From 
  E. 
  carillus 
  it 
  differs 
  by 
  having 
  8 
  instead 
  of 
  6 
  

   mammas. 
  

  

  Epimys 
  ceta, 
  sp. 
  n. 
  

  

  General 
  appearance 
  of 
  E. 
  alleni 
  Brain-case 
  very 
  large 
  

   and 
  broad. 
  

  

  Proportions 
  as 
  in 
  E. 
  alleni. 
  Colour 
  above 
  rather 
  more 
  

   buffy 
  than 
  "wood-brown" 
  ; 
  sides 
  clearer 
  buffy, 
  forming 
  a 
  

   buffy 
  line 
  along 
  the 
  edge 
  of 
  the 
  abdominal 
  colour, 
  which 
  is 
  

   well-defined 
  white, 
  the 
  bases 
  of 
  the 
  hairs 
  pale 
  slaty. 
  Ears 
  

   rather 
  smaller 
  than 
  in 
  alleni, 
  grey-brown. 
  Hands 
  whitish 
  ; 
  

   feet 
  with 
  whitish 
  edges 
  and 
  digits, 
  middle 
  line 
  of 
  metatarsus 
  

   darker. 
  Tail 
  uniformly 
  brown. 
  

  

  Skull 
  with 
  a 
  very 
  large 
  brain-case, 
  shaped 
  somewhat 
  like 
  

   that 
  of 
  a 
  Nyctomys 
  ; 
  the 
  interorbital 
  region 
  broad, 
  with 
  well- 
  

   defined 
  supraorbital 
  beads, 
  which 
  extend 
  backwards 
  half 
  

   across 
  the 
  parietals. 
  Muzzle 
  small 
  and 
  slender. 
  Ante- 
  

   orbital 
  plate 
  very 
  slightly 
  projected 
  forward, 
  though 
  more 
  so 
  

   than 
  in 
  alleni. 
  Palatal 
  foramina 
  longer 
  and 
  bullae 
  larger 
  

   than 
  in 
  alleni. 
  Molars 
  narrow, 
  of 
  the 
  rather 
  Uromys-Wke 
  

   shape 
  found 
  in 
  this 
  group 
  of 
  mice 
  ; 
  inner 
  cusp 
  of 
  second 
  

   lamina 
  of 
  m 
  l 
  and 
  in 
  2 
  elongated 
  antero-posteriorly. 
  

  

  