﻿358 
  Mr. 
  O. 
  Thomas 
  on 
  

  

  reduced 
  tliat 
  tlie 
  passage 
  to 
  the 
  nifous 
  is 
  further 
  back 
  and 
  

   more 
  imperceptil)le. 
  Tn 
  reissii 
  tlie 
  terminal 
  part 
  of 
  the 
  

   underfnr 
  is 
  brown, 
  while 
  in 
  andinus 
  it 
  is 
  " 
  pinkish 
  buflf." 
  

   Under 
  surface 
  mostly 
  whitish, 
  with 
  but 
  little 
  suffusion 
  of 
  

   rufous; 
  hairs 
  of 
  throat 
  almost 
  pure 
  white. 
  Chin 
  with 
  an 
  

   inconspicuous 
  brownish 
  patch, 
  as 
  is 
  the 
  case 
  in 
  all 
  the 
  large 
  

   Pseud'dopex, 
  while 
  in 
  the 
  smaller 
  ones 
  it 
  is 
  frequently 
  con- 
  

   trasted 
  black. 
  Ears, 
  crown, 
  and 
  outer 
  sides 
  of 
  limbs 
  rich 
  

   ferruginous, 
  as 
  usual. 
  Tail 
  with 
  long 
  thick 
  hairs 
  fortning 
  a 
  

   fine 
  brush, 
  *' 
  pinkish 
  buff/^ 
  the 
  patch 
  over 
  gland 
  and 
  tip 
  

   black. 
  

  

  Dimensions 
  of 
  the 
  type 
  : 
  — 
  

  

  Hind 
  foot 
  148 
  mm. 
  

  

  Skull: 
  greatest 
  length 
  165; 
  condylo-basal 
  length 
  15f) 
  ; 
  

   zygomatic 
  breadth 
  88; 
  nasals, 
  length 
  on 
  middle 
  line 
  54; 
  

   interorbital 
  breadth 
  31 
  ; 
  breadth 
  of 
  brain-case 
  50 
  ; 
  palatal 
  

   length 
  84; 
  length 
  of 
  j(/ 
  on 
  outer 
  edge 
  16, 
  combined 
  length 
  of 
  

   vi^ 
  and 
  ni^ 
  16*8. 
  

  

  Hah. 
  High 
  plateau 
  of 
  Bolivia 
  and 
  Peru. 
  Type 
  from 
  

   Esperanza, 
  near 
  Mt. 
  Sajama, 
  Province 
  of 
  Oruro, 
  Bolivia. 
  

   Alt. 
  4000 
  m. 
  Another 
  example 
  from 
  Incapirca, 
  Junin, 
  Peru. 
  

   Alt. 
  17,000' 
  {J. 
  KaUnowski). 
  

  

  Type. 
  Adult 
  male. 
  B.M. 
  no. 
  98. 
  3. 
  16. 
  1. 
  Original 
  

   number 
  1816. 
  Collected 
  9th 
  July, 
  1897, 
  by 
  Gustav 
  Garlnpp. 
  

   Three 
  specimens. 
  

  

  This 
  plateau 
  fox 
  is 
  clearly 
  most 
  nearly 
  allied 
  to 
  the 
  

   northern 
  Ps. 
  c. 
  reissii, 
  with 
  which 
  it 
  shares 
  the 
  normal- 
  

   shaped 
  skull, 
  not 
  disproportionally 
  elongated 
  in 
  the 
  muzzle, 
  

   but 
  differs 
  by 
  its 
  more 
  buffy 
  nape 
  and 
  fore-back, 
  the 
  heavy 
  

   black 
  grizzling 
  not 
  commencing 
  tiearly 
  so 
  far 
  forward. 
  The 
  

   four 
  specimens 
  available 
  are 
  all 
  identical 
  in 
  this 
  respect. 
  

  

  Objection 
  may 
  be 
  taken 
  to 
  my 
  considering 
  as 
  the 
  same 
  

   species 
  animals 
  from 
  such 
  enormous 
  north 
  and 
  south 
  distances 
  

   as 
  from 
  N. 
  Ecuador 
  to 
  the 
  Straits 
  of 
  Magellan 
  (nearly 
  

   4000 
  miles). 
  It 
  must, 
  however, 
  be 
  remembered 
  that, 
  owing 
  

   to 
  the 
  unbroken 
  mountain 
  chain 
  running 
  down 
  S. 
  America, 
  

   practically 
  similar 
  climatic 
  conditions 
  are 
  to 
  be 
  found 
  without 
  

   a 
  break 
  throughout 
  the 
  whole 
  distance, 
  only 
  varying 
  with 
  

   altitude, 
  so 
  that 
  there 
  is 
  nothing 
  unnatural 
  in 
  the 
  animals 
  of 
  

   the 
  highlands 
  of 
  the 
  tropics, 
  the 
  middle 
  altitudes 
  of 
  Chili, 
  and 
  

   the 
  lowlands 
  of 
  Patagonia 
  being 
  all 
  specifically 
  the 
  same. 
  A 
  

   similar 
  state 
  of 
  things 
  does 
  not 
  occur 
  in 
  any 
  other 
  of 
  the 
  

   great 
  continents 
  of 
  the 
  world. 
  

  

  In 
  Uruguay, 
  however, 
  widely 
  separated 
  from 
  the 
  known 
  

   range 
  of 
  the 
  Culpeo, 
  there 
  occurs 
  another 
  species 
  which 
  has, 
  

   as 
  usual, 
  been 
  called 
  '^ 
  Cam's 
  azarce,^' 
  but 
  proves 
  to 
  be 
  a 
  small 
  

   relative 
  of 
  the 
  Culpeo, 
  and 
  is 
  equally 
  different 
  from 
  the 
  

  

  