﻿426 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  Promerycochoerus 
  montanus 
  (Cope) 
  

  

  USNM 
  19089, 
  skull 
  and 
  jaws 
  with 
  rostrum 
  missing, 
  from 
  Lower 
  

   Miocene 
  of 
  locality 
  No. 
  24LC18. 
  

  

  This 
  specimen 
  is 
  that 
  of 
  an 
  old 
  individual 
  with 
  the 
  teeth 
  well 
  worn. 
  

   However, 
  the 
  specimen 
  is 
  only 
  slightly 
  crushed 
  and 
  the 
  size 
  and 
  con- 
  

   figiu-ation 
  can 
  be 
  determined 
  with 
  reasonable 
  certainty. 
  

  

  Cyclopidius 
  simus 
  Cope 
  

  

  USNM 
  19086, 
  skull 
  and 
  jaws, 
  from 
  the 
  Lower 
  Miocene 
  of 
  locality 
  

   No. 
  24LC18; 
  USNM 
  19088, 
  skull 
  and 
  jaws, 
  from 
  same 
  locahty; 
  

   USNM 
  19087, 
  right 
  mandible 
  with 
  dPs-Mg. 
  

  

  Discussion. 
  — 
  Thorpe 
  (1937, 
  p. 
  242) 
  lists 
  six 
  species 
  of 
  Cyclopidius 
  

   from 
  the 
  Miocene 
  deposits 
  of 
  the 
  Smith 
  River 
  area 
  and 
  concludes 
  that 
  

   only 
  one 
  species 
  {C. 
  simus 
  Cope) 
  is 
  valid. 
  Koerner 
  (1940, 
  pp. 
  856- 
  

   858) 
  describes 
  two 
  new 
  species 
  from 
  this 
  area, 
  but 
  he 
  does 
  not 
  use 
  

   the 
  same 
  set 
  of 
  characters 
  to 
  distinguish 
  the 
  two 
  species 
  from 
  each 
  

   other 
  or 
  from 
  C. 
  simus. 
  Nor 
  does 
  he 
  present 
  a 
  standard 
  set 
  of 
  

   measurements 
  for 
  the 
  three 
  species. 
  Consequently 
  it 
  is 
  impossible 
  

   to 
  appraise 
  the 
  vahdity 
  of 
  his 
  species 
  from 
  his 
  treatise. 
  

  

  The 
  best 
  preserved 
  specimen 
  is 
  somewhat 
  larger 
  than 
  the 
  measure- 
  

   ments 
  which 
  Thorpe 
  (1937, 
  p. 
  291) 
  gives 
  for 
  C. 
  simus 
  or 
  its 
  synonyms. 
  

   It 
  is 
  nearly 
  as 
  large 
  as 
  C. 
  lullianus 
  Thorpe, 
  but 
  the 
  details 
  of 
  the 
  facial 
  

   vacuities 
  are 
  very 
  different 
  from 
  that 
  species 
  and 
  agree 
  with 
  C 
  simus. 
  

  

  Family 
  Camelidae 
  

  

  Po'ebrotherium 
  cf. 
  eximium 
  Hay 
  

  

  USNM 
  18944, 
  right 
  mandibular 
  fragment 
  with 
  P3-M1; 
  USNM 
  

   18945, 
  left 
  mandibular 
  fragment 
  with 
  dP2-4; 
  CM 
  9301, 
  right 
  man- 
  

   dibular 
  fragment 
  with 
  P4-M1. 
  All 
  specimens 
  are 
  from 
  locality 
  

   No. 
  24BW18. 
  

  

  This 
  material 
  is 
  too 
  fragmentary 
  for 
  accurate 
  specific 
  determina- 
  

   tion 
  but 
  is 
  adequate 
  to 
  establish 
  the 
  presence 
  of 
  this 
  genus 
  in 
  these 
  

   deposits. 
  

  

  Family 
  Hypertragulidae 
  

  

  Leptonieryx 
  transmontanus 
  Douglass 
  

  

  Leptomeryx? 
  esulcatus 
  Matthew, 
  1903. 
  Bull. 
  Amer. 
  Mus. 
  Nat. 
  Hist., 
  vol, 
  19, 
  p. 
  222, 
  

   fig, 
  15. 
  

  

  USNM 
  18931, 
  18932, 
  18934-18939, 
  eight 
  mandibular 
  fragments, 
  

   and 
  USNM 
  18933, 
  one 
  maxillary 
  fragment, 
  all 
  from 
  locality 
  No. 
  

   24LC16; 
  USNM 
  18940-18943 
  and 
  CM 
  9293, 
  five 
  mandibular 
  frag- 
  

   ments, 
  and 
  CM 
  9291, 
  9304, 
  two 
  maxillary 
  fragments, 
  all 
  from 
  locality 
  

   No. 
  24BW18. 
  

  

  