﻿526 
  J. 
  W. 
  HITLKE 
  (Mf 
  A 
  MODIFIED 
  FOKM 
  OF 
  DINOSAUBIAN 
  ILIUM. 
  

  

  thick 
  acromial 
  ridge, 
  which 
  extends 
  transversely, 
  and 
  is 
  continued 
  

   forwards 
  as 
  a 
  long 
  subprismatic 
  process 
  from 
  the 
  anterior 
  angle 
  of 
  

   the 
  head 
  of 
  the 
  scapula. 
  This 
  process, 
  which 
  appears 
  likewise 
  to 
  

   be 
  present 
  in 
  the 
  scapula 
  of 
  Iguanodon, 
  perhaps 
  also 
  in 
  Megalo- 
  

   saunis, 
  is 
  broken 
  off 
  in 
  the 
  present 
  specimen 
  about 
  four 
  inches 
  from 
  

   the 
  neck 
  of 
  the 
  scapula, 
  with 
  which 
  it 
  forms 
  a 
  right 
  angle"*. 
  

  

  It 
  is 
  not 
  stated 
  from 
  what 
  specimen 
  this 
  description 
  is 
  taken. 
  

   Only 
  four 
  are, 
  I 
  believe, 
  yet 
  known 
  ; 
  and 
  these 
  are 
  all 
  in 
  the 
  British 
  

   Museum. 
  Two 
  of 
  them 
  are 
  the 
  immature 
  pair 
  in 
  the 
  Tilgate-Forest 
  

   slab, 
  which 
  has 
  been 
  so 
  often 
  figured 
  ; 
  and 
  in 
  these 
  the 
  crest 
  cross- 
  

   ing 
  the 
  outer 
  surface 
  above 
  the 
  humeral 
  and 
  coracoid 
  borders 
  is 
  but 
  

   slightly 
  developed, 
  and 
  it 
  ends 
  in 
  front 
  very 
  slightly 
  in 
  advance 
  of 
  

   that 
  part 
  of 
  the 
  coracoid 
  border 
  which 
  is 
  still 
  joined 
  to 
  the 
  coracoid 
  

   bone. 
  I 
  fail 
  to 
  perceive 
  here 
  any 
  indication 
  of 
  a 
  " 
  long 
  subprismatic 
  

   process 
  " 
  continued 
  forwards 
  from 
  " 
  the 
  thick 
  (transverse) 
  acromial 
  

   ridge 
  ;" 
  nor 
  do 
  I 
  find 
  any 
  thing 
  answering 
  to 
  this 
  description 
  in 
  the 
  

   two 
  other 
  scapulae, 
  which, 
  from 
  their 
  much 
  larger 
  size 
  and 
  massive- 
  

   ness, 
  belonged 
  to 
  a 
  much 
  older 
  and 
  probably 
  mature 
  individual. 
  Of 
  

   one 
  only 
  the 
  articular 
  end, 
  very 
  mutilated, 
  is 
  preserved 
  ; 
  the 
  other 
  

   (No. 
  584, 
  Mantellian 
  Catalogue; 
  No. 
  2584, 
  Brit. 
  Mus. 
  MS. 
  Catal.) 
  

   is 
  a 
  magnificent 
  specimen, 
  almost 
  complete. 
  It 
  wants 
  only 
  the 
  an- 
  

   terior 
  inferior 
  angle, 
  formed 
  by 
  the 
  junction 
  of 
  the 
  anterior 
  and 
  the 
  

   lower 
  or 
  coracoid 
  border. 
  The 
  fracture 
  which 
  has 
  severed 
  this 
  

   missing 
  piece 
  passes 
  vertically, 
  in 
  the 
  same 
  plane, 
  through 
  the 
  cora- 
  

   coid 
  border 
  and 
  the 
  anterior 
  termination 
  of 
  the 
  transverse 
  crest, 
  

   where 
  it 
  merges 
  into 
  this 
  just 
  in 
  front 
  of 
  the 
  wide, 
  and 
  here 
  shallow, 
  

   groove 
  which 
  separates 
  the 
  crest 
  and 
  this 
  articular 
  border. 
  This 
  

   scapula 
  also 
  yields 
  no 
  evidence 
  that 
  its 
  crest 
  was 
  produced 
  forwards 
  

   in 
  the 
  shape 
  of 
  a 
  slender 
  process 
  beyond 
  the 
  coracoid 
  border. 
  In 
  

   the 
  absence 
  of 
  any 
  evidence 
  of 
  the 
  existence 
  of 
  a 
  long 
  slender 
  an- 
  

   teriorly 
  projecting 
  process, 
  the 
  resemblance 
  of 
  the 
  " 
  scapula 
  of 
  an 
  

   unknown 
  reptile 
  " 
  to 
  that 
  of 
  Hglceosaurus 
  in 
  respect 
  of 
  such 
  a 
  process 
  

   seems 
  to 
  me 
  to 
  be 
  wanting 
  in 
  proof, 
  and 
  untenable. 
  

  

  Upon 
  a 
  close 
  comparison 
  of 
  the 
  long 
  slender 
  process 
  with 
  the 
  

   processes 
  detached 
  from 
  the 
  anterior 
  border 
  of 
  the 
  scapula 
  in 
  certain 
  

   extant 
  lizards, 
  such 
  differences 
  discover 
  themselves 
  as 
  seem 
  to 
  me 
  

   to 
  disprove 
  their 
  identity. 
  There 
  is 
  no 
  skeleton 
  of 
  Scincus 
  in 
  the 
  

   British 
  Museum, 
  or 
  in 
  that 
  of 
  the 
  Royal 
  College 
  of 
  Surgeons 
  ; 
  and 
  

   my 
  knowledge 
  of 
  its 
  scapula 
  is 
  derived 
  from 
  the 
  figure 
  in 
  Cuvier's 
  

   ' 
  Ossemens 
  Fossiles.' 
  In 
  this 
  figure 
  the 
  process, 
  passing 
  off 
  from 
  

   the 
  anterior 
  border 
  of 
  the 
  neck 
  of 
  the 
  scapula, 
  is 
  represented 
  as 
  

   bending 
  upwards 
  and 
  forwards 
  nearly 
  parallel 
  with 
  this 
  border, 
  a 
  

   direction 
  quite 
  different 
  from 
  that 
  of 
  the 
  process 
  in 
  any 
  of 
  the 
  spe- 
  

   cimens 
  of 
  the 
  unknown 
  reptile's 
  scapula, 
  and 
  one 
  which 
  has 
  an 
  

   obvious 
  relation 
  to 
  the 
  process 
  detached 
  from 
  the 
  front 
  of 
  the 
  cora- 
  

   coid 
  bone, 
  to 
  the 
  end 
  of 
  which 
  it 
  is 
  linked 
  by 
  a 
  cartilaginous 
  loop. 
  

   The 
  shape 
  of 
  the 
  scapular 
  process 
  in 
  Scincus 
  is, 
  I 
  believe, 
  also 
  dif- 
  

  

  * 
  Report 
  on 
  British 
  Fossil 
  Reptiles 
  in 
  Brit. 
  Assoc. 
  Report, 
  1841, 
  p. 
  117; 
  and 
  

   Brit. 
  Foss. 
  Rept. 
  of 
  the 
  Wealclen 
  Formations 
  — 
  Monograph 
  Hylceoscatrus, 
  where 
  

   this 
  extract 
  is 
  reproduced. 
  

  

  