﻿1 
  niiho 
  saurian 
  Genus 
  Oniitlioclieirus. 
  541 
  

  

  centrums 
  flat 
  and 
  3 
  to 
  7 
  convex. 
  In 
  specimen 
  J. 
  c. 
  4, 
  3, 
  

   which 
  consists 
  of 
  three 
  vertebra, 
  the 
  bases 
  of 
  two 
  transverse 
  

   ribs 
  are 
  preserved. 
  

  

  The 
  Caudal 
  Vertebrce. 
  

  

  The 
  examples 
  determined 
  as 
  caudal 
  vertebrae 
  by 
  Seeley 
  in 
  

   ' 
  Ornitho-auria 
  ^ 
  he 
  later* 
  believed 
  to 
  be 
  cervicals. 
  Some 
  

   are 
  doubtless 
  centrums 
  of 
  cervicals. 
  The 
  absence 
  of 
  traus- 
  

   vcr.se 
  processes 
  and 
  their 
  ampliiplatyan 
  nature 
  bring 
  them 
  

   cL 
  se 
  to 
  Ornithostoma 
  [Pteranodori). 
  

  

  The 
  Scapula 
  and 
  Coracoid. 
  

  

  These 
  bones 
  may 
  be 
  separated 
  into 
  two 
  groups. 
  One 
  of 
  

   these, 
  typified 
  by 
  speciuieus 
  J. 
  a. 
  3, 
  was 
  figured 
  by 
  Owen 
  t- 
  

   This 
  example 
  is 
  very 
  interesting, 
  because 
  it 
  exhibits 
  on 
  the 
  

   inner 
  side 
  of 
  the 
  scapular 
  arch 
  tlie 
  bar 
  of 
  bone 
  bracing 
  the 
  

   scapula 
  and 
  coracoid, 
  and 
  enclosing 
  a 
  foramen 
  similar 
  to 
  

   that 
  mentioned 
  by 
  Prof. 
  Willistou 
  % 
  as 
  found 
  in 
  Ornithostoma 
  

   [I'teranodon) 
  and 
  Ni/ctosaurus. 
  There 
  would 
  not 
  seem 
  to 
  be 
  

   further 
  proof 
  required 
  that 
  this 
  type 
  of 
  scapula-coracoid 
  

   belongs 
  to 
  the 
  toothless 
  English 
  genus 
  Ornithostoma. 
  The 
  

   coraco-scapular 
  suture 
  is 
  oblique 
  to 
  the 
  long 
  axis 
  of 
  the 
  

   glenoid 
  cavity. 
  The 
  head 
  of 
  the 
  coracoid 
  is 
  not 
  so 
  globular 
  

   as 
  that 
  typified 
  by 
  J. 
  c. 
  4, 
  18, 
  6. 
  This 
  specimen, 
  figured 
  by 
  

   Seeley 
  §, 
  is 
  characterized 
  by 
  the 
  absence 
  of 
  the 
  bar 
  of 
  bone, 
  

   interior 
  to 
  the 
  anchylosed 
  humeral 
  extremities 
  of 
  these 
  bones. 
  

   Both 
  these 
  two 
  types 
  are 
  easily 
  differentiated 
  from 
  Ornitho- 
  

   desmus 
  latidens 
  by 
  the 
  diagonal 
  direction 
  of 
  the 
  line 
  of 
  

   anch\losisof 
  tlie 
  scapula 
  with 
  the 
  coracoid 
  across 
  the 
  glenoid 
  

   articulation, 
  which 
  in 
  the 
  litter 
  is 
  horizontal. 
  The 
  type, 
  

   J. 
  c. 
  4, 
  18, 
  G, 
  is 
  very 
  neaily 
  similar 
  in 
  form 
  to 
  the 
  latter, 
  

   and 
  both 
  are 
  alike 
  in 
  the 
  non-presence 
  of 
  the 
  inner 
  bar 
  of 
  

   bone. 
  

  

  The 
  Humerus. 
  

  

  Seeley 
  || 
  mentions 
  fifty 
  specimens 
  of 
  this 
  bone. 
  J. 
  a. 
  8, 
  1 
  

   may 
  be 
  dismissed 
  as 
  useless. 
  It 
  is 
  part 
  of 
  a 
  large 
  lindj- 
  

   bune, 
  from 
  its 
  size 
  more 
  probably 
  Diuosaurian, 
  for 
  it 
  is 
  

  

  * 
  II. 
  G. 
  Seeley, 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  1875. 
  

  

  t 
  R. 
  Owen, 
  Cret. 
  Form. 
  Hep. 
  (Mon. 
  Pal. 
  Soc. 
  1859), 
  Suppl. 
  i. 
  p. 
  Ill, 
  

  

  ii^-. 
  1. 
  

  

  I 
  S. 
  W. 
  WillLston, 
  Kansas 
  Univ. 
  Quart. 
  1897, 
  p. 
  43 
  ; 
  aud 
  lUcld 
  Cul. 
  

   jNIus. 
  Pub. 
  78, 
  geo. 
  ser. 
  vol. 
  iii. 
  no. 
  3, 
  ]ip. 
  140-141. 
  

  

  § 
  H. 
  G. 
  Seeley, 
  ' 
  Ornithosauria,' 
  187U, 
  pi, 
  i. 
  fig. 
  10. 
  

  

  II 
  /(/. 
  ibid. 
  p. 
  38. 
  

  

  