﻿small 
  Mammals 
  from 
  Djarhent. 
  569 
  

  

  Skull 
  nearly 
  as 
  large 
  as 
  in 
  amphibhis, 
  but 
  with 
  the 
  fossorial 
  

   characteristics 
  of 
  that 
  of 
  terrestris 
  not 
  only 
  well 
  marked 
  but 
  

   intensified 
  ; 
  the 
  incisors 
  even 
  more 
  thrown 
  forward 
  and 
  the 
  

   supraoccipital 
  area 
  so 
  slanted 
  forward 
  that 
  in 
  vertical 
  view 
  it 
  

   equals 
  the 
  interparietal 
  in 
  apparent 
  extent. 
  In 
  amphibius 
  it 
  

   is 
  scarcely 
  visible 
  at 
  all 
  from 
  above, 
  in 
  sapidus 
  and 
  terrestris 
  

   it 
  appears 
  decidedly 
  less 
  in 
  extent 
  than 
  the 
  interparietal, 
  and 
  

   only 
  in 
  the 
  small 
  and 
  nearly 
  completely 
  fossorial 
  scherman 
  

   does 
  it 
  equal 
  the 
  interparietal 
  as 
  in 
  scythicus. 
  Though 
  large, 
  

   the 
  skull 
  is 
  not 
  highly 
  ridged, 
  certainly 
  less 
  so 
  than 
  in 
  

   ampJiibius. 
  

  

  Teeth 
  about 
  as 
  in 
  terrestris, 
  the 
  incisors 
  slightly 
  more 
  

   thrown 
  forwards, 
  ]\P 
  consisting 
  of 
  only 
  three 
  triangles 
  and 
  

   a 
  simple 
  posterior 
  lobe, 
  as 
  in 
  (Scandinavian 
  terrestris 
  {cf, 
  

   Blasius's 
  figure 
  188*). 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  in 
  flesh) 
  : 
  — 
  

  

  Head 
  and 
  body 
  200 
  mm.f 
  ; 
  tail 
  130; 
  hind 
  foot 
  34. 
  

  

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

   42-5; 
  zygomatic 
  breadth 
  24-8; 
  nasals 
  li'6x4-7; 
  palatilar 
  

   length 
  22*6 
  ; 
  upper 
  molar 
  series 
  9'6. 
  

  

  Type. 
  Okl 
  female. 
  B.M. 
  no. 
  14. 
  5. 
  10. 
  154. 
  Original 
  

   number 
  255. 
  Collected 
  5th 
  May, 
  1913. 
  

  

  This 
  water-vole 
  is 
  a 
  large 
  race 
  of 
  the 
  Scandinavian 
  A. 
  ter- 
  

   restris, 
  with 
  which 
  it 
  agrees 
  in 
  its 
  more 
  essential 
  characters. 
  

   It 
  will 
  probably 
  be 
  found 
  to 
  be 
  the 
  form 
  which 
  occurs 
  

   throughout 
  Asiatic 
  Russia. 
  

  

  The 
  striking 
  revision 
  of 
  the 
  water-voles 
  recently 
  published 
  

   by 
  Mr. 
  Miller 
  I 
  has 
  alone 
  enabled 
  me 
  to 
  appreciate 
  the 
  true 
  

   relationship 
  of 
  this 
  fine 
  animal. 
  

  

  24. 
  Microtus 
  {Microtus} 
  ilceiis, 
  Thos. 
  

  

  Nineteen 
  specimens. 
  

  

  The 
  type 
  of 
  this 
  well-marked 
  species 
  was 
  in 
  the 
  first 
  

   collection 
  sent 
  by 
  Mr. 
  Ruckbeil 
  (B.M. 
  no. 
  11. 
  12. 
  14. 
  30). 
  

  

  The 
  specimens 
  are 
  labelled 
  as 
  having 
  been 
  caught 
  alono- 
  

   the 
  banks 
  of 
  the 
  Uszek 
  and 
  Hi 
  Rivers. 
  

  

  Some 
  of 
  the 
  skulls 
  have 
  an 
  unusually 
  long 
  median 
  spike 
  

   at 
  the 
  posterior 
  end 
  of 
  the 
  palate, 
  while 
  in 
  others 
  this 
  is 
  

   entirely 
  absent. 
  

  

  25. 
  Microtus 
  {Microtus) 
  ohscurus^ 
  Eversm. 
  

   Thirty 
  specimens. 
  

  

  * 
  Saug. 
  Deutschl. 
  p. 
  345, 
  

  

  f 
  This 
  measurement 
  is 
  probably 
  too 
  large. 
  Other 
  specimens 
  are 
  

  

  measured 
  as 
  166, 
  167, 
  and 
  178 
  mm, 
  in 
  trunk-length, 
  

   + 
  Cat, 
  Mamm, 
  W. 
  Europe, 
  p, 
  724 
  (1912). 
  

  

  