﻿Mammals 
  from 
  Northern 
  Nigeria. 
  461 
  

  

  9. 
  Arvicanthis 
  striatus 
  venustus, 
  subsp. 
  n. 
  

  

  <?. 
  1. 
  Panyam, 
  4000'. 
  B.M. 
  no. 
  11. 
  3. 
  24. 
  13. 
  Col- 
  

   lected 
  2nd 
  May, 
  1910. 
  Type. 
  

  

  A 
  pale 
  form 
  of 
  the 
  A. 
  striatus 
  * 
  group. 
  

  

  !Size 
  about 
  as 
  in 
  A. 
  pulcher, 
  Wrought., 
  whose 
  distinctness 
  

   from 
  pulchellus 
  I 
  am 
  disposed 
  to 
  doubt. 
  General 
  colour 
  very 
  

   pale, 
  the 
  ground-colour 
  between 
  " 
  clay-colour 
  " 
  and 
  " 
  raw 
  

   umber/' 
  the 
  light 
  punctated 
  stripes 
  less 
  conspicuous 
  than 
  

   usual. 
  Under 
  surface 
  dull 
  whitish, 
  not 
  sharply 
  defined 
  

   laterally. 
  Median 
  black 
  dorsal 
  line 
  strong 
  and 
  well 
  denned 
  

   as 
  usual. 
  Sides 
  of 
  muzzle 
  and 
  a 
  spot 
  above 
  each 
  eye 
  buffy. 
  

   Ears 
  with 
  their 
  proectote 
  brown, 
  metentote 
  dull 
  ochraceous 
  ; 
  

   a 
  tuft 
  at 
  their 
  anterior 
  bases 
  and 
  a 
  small 
  patch 
  behind 
  them 
  

   deep 
  ochraceous. 
  Hands 
  and 
  feet 
  dull 
  buffy 
  white. 
  Tail 
  

   brown 
  above, 
  dull 
  whitish 
  below. 
  

  

  iSkull 
  very 
  like 
  that 
  of 
  the 
  type 
  of 
  A. 
  pulcher, 
  but 
  the 
  

   molars 
  rather 
  larger. 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  in 
  flesh) 
  : 
  — 
  

  

  Head 
  and 
  body 
  119 
  mm.; 
  tail 
  140; 
  hind 
  toot 
  28. 
  

  

  Skull 
  : 
  greatest 
  length 
  32 
  ; 
  condylo-incisive 
  length 
  29 
  - 
  3 
  ; 
  

   greatest 
  breadth 
  15*5; 
  nasals 
  12*6; 
  interorbital 
  breadth 
  6 
  ; 
  

   palatilar 
  length 
  14 
  ; 
  palatal 
  foramina 
  6*3 
  ; 
  upper 
  molar 
  

   series 
  5"6. 
  

  

  Hob. 
  and 
  Type 
  as 
  above. 
  

  

  Quite 
  distinct 
  from 
  any 
  known 
  form 
  of 
  the 
  striatus 
  group 
  

   by 
  its 
  pale 
  colour 
  and 
  less 
  conspicuous 
  striping. 
  

  

  10. 
  Epimys 
  jacksoni 
  viator, 
  subsp. 
  n. 
  

  

  S 
  . 
  6 
  ; 
  ? 
  . 
  7. 
  Panyam, 
  4000'. 
  

  

  Quite 
  like 
  true 
  Central 
  African 
  jacksoni, 
  but 
  the 
  colour 
  

   markedly 
  paler. 
  

  

  General 
  colour 
  of 
  upper 
  surface 
  pale 
  rufous 
  fawn, 
  darker 
  

   and 
  more 
  rufous 
  than 
  " 
  clay-colour." 
  Sides 
  dark 
  pinkish 
  

   buff. 
  Belly 
  white, 
  the 
  bases 
  of 
  the 
  hairs 
  slaty 
  grey. 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  in 
  flesh) 
  : 
  — 
  

  

  Head 
  and 
  body 
  109 
  mm. 
  ; 
  tail 
  167 
  ; 
  hind 
  foot 
  26; 
  ear 
  20. 
  

  

  Skull 
  : 
  greatest 
  length 
  32 
  ; 
  condylc-iucisive 
  length 
  28"8 
  ; 
  

   nasals 
  12'2; 
  interorbital 
  breadth 
  4*6 
  ; 
  palatal 
  foramina 
  7*5 
  ; 
  

   upper 
  molar 
  series 
  5'1. 
  

  

  Hob. 
  as 
  above. 
  

  

  * 
  Cf. 
  P. 
  Z. 
  S. 
  1911, 
  p. 
  1J8. 
  Sierra 
  Leone 
  specimens, 
  however, 
  will 
  be 
  

   needed 
  for 
  comparison 
  with 
  the 
  types 
  of 
  jmlchcr 
  and 
  pulchellus 
  before 
  the 
  

   mutual 
  relationships 
  of 
  the 
  three 
  can 
  be 
  made 
  out. 
  

  

  