﻿5oG 
  Mr. 
  R. 
  W. 
  Hooley 
  on 
  the 
  

  

  Group 
  No. 
  3. 
  

  

  Beaks 
  with 
  strong 
  lateral 
  compression 
  forming 
  dorsal 
  

   keel, 
  triangi;lar 
  in 
  section, 
  truncated 
  tip, 
  moderate 
  vertical 
  

   depth. 
  Dorsal 
  outline 
  rising 
  from 
  the 
  tip 
  at 
  a 
  high 
  angle. 
  

   Longitudinal 
  ridge 
  on 
  palate 
  as 
  in 
  Omit 
  hoc 
  heirus. 
  Very 
  

   large 
  circular 
  teeth, 
  anterior 
  much 
  larger 
  than 
  posterior, 
  

   none 
  directed 
  forward. 
  

  

  Examples 
  : 
  — 
  

  

  O. 
  crassidctis 
  (Seeley). 
  H. 
  G. 
  Seeley, 
  ' 
  Ornithosaiiria,' 
  1870, 
  p. 
  122. 
  

   O. 
  I'Hri/f/nathus 
  (Seeley). 
  H. 
  G. 
  Seeley, 
  ' 
  Ornithosaiiria,' 
  1870, 
  p. 
  123. 
  

   O. 
  plati/somus 
  (Seeley). 
  H. 
  G. 
  Seeley, 
  ' 
  Oniithosauria,' 
  1870, 
  p. 
  120. 
  

  

  To 
  this 
  genus 
  we 
  would 
  give 
  the 
  name 
  Amblydectes. 
  

  

  Group 
  No. 
  4. 
  

  

  Massive 
  truncated 
  club-shaped 
  snout, 
  great 
  vertical 
  

   depth, 
  longitudinal 
  ridge 
  on 
  palate, 
  teeth 
  subcircular 
  and 
  

   veitically 
  directed, 
  front 
  pair 
  much 
  smaller 
  than 
  the 
  rest. 
  

  

  Examples 
  : 
  — 
  

  

  O. 
  capita 
  (Seeley). 
  11. 
  G. 
  Seelev, 
  ' 
  Ornitliosauiia,' 
  1870, 
  p. 
  126. 
  

  

  O. 
  carteri 
  (Seeley). 
  H. 
  G. 
  Seeley, 
  ' 
  Onntbosauiia,' 
  1870, 
  p. 
  128. 
  

  

  O. 
  jjlatyrhimts 
  (Seeley). 
  H. 
  G. 
  Seeley, 
  ' 
  Oraithosauria,' 
  1870, 
  p. 
  128. 
  

  

  O. 
  simns. 
  R.Owen, 
  liep. 
  Cret. 
  Form. 
  (1861), 
  Suppl. 
  iii. 
  pis. 
  i. 
  & 
  ii., 
  

  

  pi. 
  iv. 
  fig. 
  4. 
  

   O. 
  woodwardl. 
  R. 
  Owen, 
  Rep. 
  Cret. 
  Form. 
  (1861), 
  Suppl. 
  iii. 
  pi. 
  ii. 
  

  

  lig. 
  .3. 
  

  

  For 
  this 
  group 
  it 
  would 
  be 
  well 
  to 
  give 
  the 
  generic 
  name 
  

   Crior/iynchus, 
  Criorhynclms 
  simus 
  being 
  the 
  type. 
  R. 
  Ly- 
  

   dekker 
  * 
  suggested 
  that 
  if 
  it 
  "should 
  prove 
  generically 
  

   different 
  from 
  Ornlthodieirvs 
  the 
  name 
  Criorhynchus 
  might 
  

   be 
  retained 
  for 
  it.'' 
  R. 
  Owen, 
  in 
  1861 
  t 
  and 
  1874 
  J, 
  deter- 
  

   mined 
  the 
  type-specimen 
  as 
  belonging 
  to 
  the 
  upper 
  jaw, 
  and 
  

   Seeley 
  in 
  1870§ 
  remarked 
  : 
  " 
  ^. 
  re-e.\amination 
  of 
  the 
  type, 
  

   Pterodactylus 
  sivius, 
  Owen, 
  has 
  convinced 
  me 
  that 
  it 
  is 
  a 
  lower 
  

   jaw." 
  Afterwards, 
  however 
  (1881) 
  ]|, 
  he 
  altered 
  this 
  view. 
  

   We 
  have 
  a 
  certain 
  character 
  to 
  denote 
  the 
  upper 
  and 
  lower 
  

   jaw 
  in 
  the 
  presence 
  of 
  a 
  longitudinal 
  ridge 
  on 
  the 
  palate 
  on 
  

   the 
  foinier 
  and 
  a 
  groove 
  on 
  the 
  latter. 
  As 
  the 
  ridj^e 
  is 
  to 
  be 
  

  

  * 
  R. 
  Lydekker, 
  B. 
  M. 
  Cat. 
  1889, 
  p. 
  3. 
  

  

  t 
  R. 
  Owen, 
  Rep. 
  Cret. 
  Form. 
  (Mon. 
  Pal. 
  See. 
  1801), 
  Sui^pl. 
  iii. 
  p, 
  2. 
  

  

  t 
  Id. 
  ibid. 
  pt. 
  i. 
  (1874) 
  p. 
  6. 
  

  

  § 
  II. 
  G. 
  Seelev, 
  ' 
  Ornithosauria,' 
  1870, 
  p. 
  127. 
  

  

  II 
  Id. 
  Geol, 
  Mag. 
  [2] 
  vol. 
  viii. 
  (1881) 
  p. 
  15. 
  

  

  