﻿244 
  On 
  a 
  neiv 
  Sj^ecies 
  o/Mjojuis/jy??? 
  Central 
  Asia. 
  

  

  median 
  p])inous 
  pvocesp. 
  The 
  squamosals 
  appvoacli 
  witliin 
  

   I'l 
  mm. 
  of 
  each 
  other 
  in 
  the 
  fore 
  part 
  of 
  the 
  brain-case, 
  and 
  

   tlie 
  bi-steplianic 
  width 
  is 
  reduced 
  to 
  3*9 
  mm.; 
  in 
  an 
  equally 
  

   old 
  skull 
  of 
  M. 
  schisdcoJor 
  these 
  two 
  dimensions 
  are 
  2*3 
  and 
  

   4'7 
  mm. 
  respectively; 
  these 
  differences 
  indicate 
  an 
  increased 
  

   development 
  of 
  the 
  anterior 
  portions 
  of 
  the 
  tem])oral 
  muscles 
  

   which 
  is 
  doubtless 
  correlated 
  with 
  the 
  enlargement 
  of 
  the 
  

   molars. 
  

  

  Cranial 
  dime^isions. 
  — 
  Condylo-basal 
  length 
  26'8 
  mm. 
  ca. 
  ; 
  zygomatic 
  

   breadth 
  1 
  6'5 
  ; 
  iiiterorbital 
  constriction 
  3'1 
  ; 
  mastoid 
  breadth 
  12'6 
  ; 
  length 
  

   and 
  anterior 
  width 
  of 
  nasals 
  7"5 
  and 
  3; 
  diastema 
  7"5 
  ; 
  cheek-teeth 
  

   (alveolar) 
  7'8; 
  palatal 
  depth 
  9-4; 
  cranial 
  depth 
  8-3; 
  mandible 
  16"7 
  ; 
  

   mandibular 
  cheek-teeth 
  (alveolar) 
  7"3. 
  

  

  Remarks. 
  — 
  Middendorif 
  (' 
  Sibirische 
  Reise/ 
  ii. 
  2, 
  p. 
  108) 
  

   long 
  ago 
  suspected 
  that 
  " 
  j\Ji/odes 
  schist 
  i 
  col 
  or" 
  ranged 
  right 
  

   across 
  Northern 
  Europe 
  and 
  Asia. 
  He 
  described 
  a 
  specimeii 
  

   trom 
  Ajan 
  on 
  the 
  west 
  coast 
  of 
  the 
  Sea 
  of 
  Okhotsk, 
  " 
  which 
  

   just 
  as 
  completely 
  agiees 
  with 
  Lilljeborg^s 
  descrij)tion 
  and 
  

   figures 
  as 
  if 
  it 
  had 
  sat 
  as 
  the 
  model." 
  This 
  statement 
  was 
  

   generally 
  ignored 
  until 
  1912, 
  when 
  liollister 
  * 
  described 
  his 
  

   M. 
  nwrulus, 
  based 
  upon 
  a 
  specimen 
  which 
  he 
  collected 
  in 
  a 
  

   nut-j)ine 
  forest, 
  at 
  an 
  altitude 
  of 
  6875 
  feet, 
  near 
  Tapucha, 
  a 
  

   }Jace 
  in 
  the 
  Altai 
  Mountains 
  125 
  miles 
  S.E. 
  of 
  Biisk. 
  This 
  

   differs 
  from 
  M. 
  scMsticolor 
  in 
  its 
  darker 
  more 
  blackish 
  colora- 
  

   tion 
  ; 
  duller 
  and 
  much 
  more 
  extensive 
  rusty 
  mantle 
  ; 
  laterally 
  

   compressed, 
  rounder 
  looped, 
  and 
  rather 
  smaller 
  cheek-teeth 
  ; 
  

   and 
  smaller 
  and 
  much 
  flatter 
  auditory 
  bullae. 
  In 
  every 
  respect, 
  

   therefore, 
  save 
  in 
  thecharacter 
  of 
  the 
  mantle, 
  J\/.7norulus\sveiy 
  

   different 
  from 
  the 
  form 
  before 
  me. 
  The 
  latter 
  comes 
  from 
  a 
  

   point 
  some 
  GOO 
  miles 
  to 
  the 
  east 
  of 
  the 
  t^'^pe 
  locality 
  of 
  

   M. 
  moruhis, 
  and 
  may 
  be 
  regarded 
  as 
  the 
  most 
  highly 
  

   specialized 
  member 
  of 
  the 
  genus 
  yet 
  discovered; 
  this 
  is 
  

   proved 
  by 
  the 
  cranial 
  and 
  dental 
  characters, 
  which 
  in 
  several 
  

   important 
  respects 
  show 
  an 
  advance 
  upon 
  those 
  of 
  717. 
  schisti- 
  

   color 
  in 
  the 
  direction 
  of 
  Lenimus, 
  and 
  by 
  the 
  lightening 
  of 
  

   the 
  colour, 
  which 
  causes 
  the 
  s])ecies 
  to 
  present 
  such 
  a 
  strong 
  

   superficial 
  resemblance 
  to 
  L. 
  ohensis 
  that 
  when 
  Mr. 
  Thomas 
  

   cursorily 
  examined 
  the 
  type 
  in 
  the 
  first 
  place 
  he 
  failed 
  to 
  

   discover 
  its 
  true 
  affinities. 
  

  

  * 
  Pniithsonian 
  Mhc. 
  Coll. 
  Ix., 
  Nov. 
  20, 
  1012, 
  no. 
  14, 
  p. 
  1 
  ; 
  and 
  Troc. 
  

   I'.S. 
  Niit. 
  Mus. 
  xlv. 
  p. 
  514 
  {21st 
  June, 
  1913}. 
  

  

  