﻿388 
  

  

  E. 
  L. 
  Troxell 
  — 
  An 
  Oligocene 
  Camel. 
  

  

  generally 
  more 
  squarely 
  cut, 
  including 
  the 
  borders 
  of 
  the 
  

   lateral, 
  posterior 
  processes. 
  The 
  dorsal 
  arch, 
  posteriorly, 
  is 
  set 
  

   in 
  and, 
  anteriorly, 
  it 
  overhangs 
  the 
  canal. 
  

  

  As 
  is 
  general 
  in 
  the 
  Camelidse 
  the 
  vertebral 
  artery 
  traverses 
  

   the 
  transverse 
  process 
  and 
  opens 
  on 
  the 
  border 
  of 
  the 
  axial 
  

   articular 
  surface. 
  These 
  surfaces, 
  which 
  are 
  nearly 
  in 
  a 
  single 
  

   plane 
  at 
  right 
  angles 
  to 
  the 
  neural 
  canal, 
  are 
  reflected 
  upon 
  

   the 
  inner 
  surface 
  of 
  the 
  arch 
  on 
  the 
  lower 
  half 
  only 
  ; 
  the 
  

   upper 
  half 
  of 
  the 
  cavity, 
  therefore, 
  is 
  wider, 
  differing 
  in 
  this 
  

   respect 
  also 
  from 
  P. 
  labiatam. 
  Rather 
  deep 
  notches 
  are 
  

   found 
  on 
  the 
  outer 
  border 
  of 
  the 
  anterior 
  cotyles. 
  

  

  Gomphotherium 
  sternhergi 
  Cope 
  is 
  distinguished 
  from 
  the 
  

   present 
  species 
  by 
  the 
  following 
  characters 
  : 
  the 
  strongly 
  

   pointed 
  and 
  recurved 
  canine, 
  the 
  deeper 
  skull, 
  the 
  anterior 
  and 
  

   posterior 
  lobes 
  of 
  the 
  molars 
  which 
  are 
  more 
  nearly 
  equal 
  

   (each 
  tooth 
  does 
  not 
  greatly 
  over-reach 
  the 
  one 
  in 
  front 
  of 
  it), 
  

   the 
  similarity 
  in 
  size 
  of 
  the 
  outer 
  and 
  inner 
  parts 
  of 
  the 
  otic 
  

   bullae 
  and 
  finally 
  by 
  the 
  orbit 
  which 
  is 
  entirely 
  encircled 
  by 
  

   bone. 
  

  

  Measurements 
  : 
  — 
  

  

  Gr. 
  sternbergi 
  

  

  mm. 
  ratio 
  

  

  Length 
  from 
  P 
  2 
  to 
  M 
  3 
  inclusive 
  60 
  99 
  

  

  " 
  P 
  2 
  to 
  M 
  3 
  " 
  65 
  99 
  

  

  " 
  entire 
  inferior 
  dentition 
  110 
  9Jf 
  

  

  N. 
  sp. 
  P. 
  eximium 
  

  

  mm. 
  ratio 
  % 
  mm. 
  

  

  59 
  

  

  64 
  

  

  103 
  

  

  87 
  

   96 
  

  

  65 
  

   72-5 
  

   107*5 
  

  

  Measurements 
  of 
  the 
  new 
  specimen, 
  P 
  o'ebr 
  other 
  ium 
  ander- 
  

   soni 
  : 
  — 
  

  

  Diameter 
  of 
  

  

  Ant-post. 
  

  

  Transverse 
  

  

  P 
  1 
  

  

  7-6 
  

  

  2'3 
  

  

  P 
  2 
  

  

  8-8 
  

  

  3-5 
  

  

  ps 
  

  

  9-4 
  

  

  5*0 
  

  

  P 
  4 
  

  

  8*4 
  

  

  7*4 
  

  

  M 
  1 
  

  

  11-0 
  

  

  io-o 
  

  

  M 
  2 
  

  

  12-0 
  

  

  11-2 
  

  

  M 
  3 
  

  

  12*2 
  

  

  12*4 
  

  

  P, 
  

  

  5-0 
  

  

  2-8 
  

  

  P 
  2 
  

  

  7*6 
  

  

  2*5 
  

  

  P 
  3 
  

  

  9-5 
  

  

  3*0 
  

  

  P 
  4 
  

  

  10-0 
  

  

  4-5 
  

  

  M 
  1 
  

  

  10-3 
  

  

  7-0 
  

  

  M 
  2 
  

  

  11-7 
  

  

  7-8 
  

  

  M 
  Q 
  

  

  15*5 
  

  

  8*2 
  

  

  