﻿44 
  

  

  ME. 
  E. 
  LYDEXKER 
  ON 
  THE 
  REMAINS 
  AND 
  AFFINITIES 
  

  

  I 
  think, 
  therefore, 
  that 
  I 
  have 
  now 
  adduced 
  sufficient 
  evidence 
  

   to 
  show 
  that 
  the 
  vertebrae 
  under 
  consideration, 
  which 
  present 
  no 
  

   characters 
  by 
  which 
  they 
  can 
  be 
  distinguished 
  from 
  the 
  dorsals 
  of 
  

   Syngonosaurus, 
  indicate 
  a 
  Dinosaur 
  apparently 
  allied 
  to 
  Hylceosaurus. 
  

   They 
  resemble 
  also 
  to 
  a 
  great 
  extent 
  the 
  dorsal 
  vertebras 
  from 
  the 
  

   Wealden 
  figured 
  in 
  pi. 
  xxi. 
  of 
  the 
  35th 
  volume 
  of 
  this 
  Journal, 
  

   under 
  the 
  name 
  of 
  Vectisaurus 
  ; 
  which 
  genus 
  I 
  have 
  suggested, 
  in 
  my 
  

   paper 
  on 
  Dinosauria 
  in 
  the 
  preceding 
  volume, 
  may 
  also 
  be 
  a 
  member 
  

   of 
  the 
  ScelidosauridaB. 
  This 
  reference 
  is 
  confirmed 
  by 
  a 
  closer 
  study 
  

   of 
  fig. 
  4 
  of 
  that 
  plate, 
  where 
  the 
  capitular 
  articulation 
  of 
  the 
  rib 
  is 
  

   seen 
  to 
  form 
  a 
  distinct 
  " 
  step 
  " 
  on 
  the 
  transverse 
  process, 
  after 
  the 
  

   fashion 
  of 
  Hylceosaurus. 
  Finally, 
  if 
  I 
  am 
  right 
  in 
  the 
  position 
  I 
  

   would 
  assign 
  to 
  these 
  forms, 
  there 
  would 
  be 
  considerable 
  probability 
  

   that 
  the 
  dermal 
  scutes 
  provisionally 
  referred 
  to 
  the 
  type 
  skeleton 
  of 
  

   Syngonosaurus 
  are 
  rightly 
  associated 
  either 
  with 
  that 
  or 
  one 
  of 
  the 
  

   allied 
  forms. 
  And 
  I 
  may 
  add 
  that, 
  with 
  the 
  present 
  insufficient 
  

   evidence, 
  I 
  have 
  purposely 
  refrained 
  from 
  discussing 
  whether 
  all 
  or 
  

   any 
  of 
  the 
  above-mentioned 
  forms 
  are 
  really 
  entitled 
  to 
  separation 
  

   from 
  genera 
  of 
  earlier 
  date. 
  

  

  II. 
  Axis 
  of 
  a 
  (? 
  Theropodous) 
  Dinosaur 
  from; 
  the 
  Wealden. 
  

  

  In 
  looking 
  through 
  some 
  undetermined 
  specimens 
  among 
  the 
  

   Fox 
  Collection 
  from 
  the 
  Wealden 
  of 
  the 
  Isle 
  of 
  Wight, 
  now 
  in 
  the 
  

   British 
  Museum, 
  I 
  was 
  struck 
  with 
  certain 
  peculiarities 
  exhibited 
  

   by 
  an 
  axis-vertebra 
  (No. 
  R. 
  1412), 
  which 
  forms 
  the 
  subject 
  of 
  this 
  

   notice. 
  The 
  specimen 
  (fig. 
  2) 
  is 
  incomplete, 
  having 
  lost 
  the 
  neural 
  

  

  Left 
  lateral, 
  hastnal, 
  and 
  anterior 
  aspects 
  of 
  the 
  axis- 
  vertebra 
  of 
  a 
  Dinosaur 
  

   from 
  the 
  Wealden 
  of 
  the 
  Isle 
  of 
  Wight 
  : 
  % 
  nat. 
  size, 
  a, 
  upper 
  (dia- 
  

   pophysis), 
  b, 
  lower 
  (parapophysis) 
  costal 
  articulation 
  ; 
  c, 
  axial 
  inter- 
  

   centrum 
  (hypapophysis) 
  ; 
  d, 
  articulation 
  for 
  centrum 
  of 
  atlas 
  (odontoid 
  

   process) 
  ; 
  e, 
  articulation 
  for 
  the 
  inferior 
  ring 
  (intercentrum) 
  of 
  the 
  

   atlas. 
  

  

  spine, 
  the 
  zygapophyses, 
  and 
  part 
  of 
  the 
  posterior 
  articular 
  face. 
  The 
  

   centrum 
  is 
  opisthocoslous, 
  and 
  shows 
  the 
  characteristic 
  early 
  Croco- 
  

  

  