﻿302 
  Mr. 
  A. 
  S. 
  Woodward's 
  Palceichthyological 
  Notes. 
  

  

  The 
  inner 
  aspect 
  of 
  the 
  fossil 
  (PI. 
  XIV. 
  fig-. 
  8) 
  is 
  most 
  

   interesting, 
  as 
  exhibiting 
  a 
  large 
  plate 
  of 
  bone 
  directly 
  con- 
  

   tinuous 
  with 
  the 
  lower 
  portion 
  of 
  the 
  outer 
  ascending 
  lamina, 
  

   but 
  lying 
  in 
  an 
  almost 
  horizontal 
  plane. 
  So 
  far 
  as 
  preserved, 
  

   this 
  plate 
  is 
  very 
  thick 
  and 
  broadest 
  anteriorly 
  (fig. 
  8 
  a) 
  ; 
  and, 
  

   taking 
  all 
  points 
  into 
  consideration, 
  it 
  seems 
  clear 
  that 
  the 
  

   specimen 
  in 
  question 
  is 
  a 
  left 
  maxilla, 
  while 
  this 
  represents 
  an 
  

   inner 
  palatal 
  extension. 
  

  

  Such 
  being 
  the 
  case, 
  the 
  maxilla 
  of 
  Saurichthys 
  exhibits 
  a 
  

   palatal 
  plate 
  as 
  large 
  as 
  that 
  of 
  many 
  Amphibia 
  and 
  Rep- 
  

   tilia 
  ; 
  but 
  the 
  genus 
  cannot, 
  on 
  that 
  account, 
  be 
  excluded 
  

   from 
  the 
  Pisces, 
  the 
  maxilla 
  in 
  some 
  early 
  types 
  (e. 
  g. 
  Poly- 
  

   pterus*) 
  being 
  known 
  to 
  possess 
  a 
  considerable 
  palatal 
  in- 
  

   growth. 
  Discoveries 
  of 
  the 
  skull 
  and 
  mandible 
  on 
  the 
  con- 
  

   tinent 
  f, 
  indeed, 
  prove 
  that 
  Saurichthys 
  was 
  a 
  long-snouted 
  

   fish, 
  bearing 
  a 
  close 
  relationship 
  to 
  Belonorhynchus 
  ; 
  and 
  it 
  

   is 
  interesting 
  to 
  note 
  that 
  these 
  fossils, 
  like 
  that 
  now 
  de- 
  

   scribed, 
  are 
  externally 
  ornamented 
  with 
  fine 
  tubercles. 
  

   Moreover, 
  the 
  teeth 
  upon 
  the 
  maxilla 
  of 
  Belonorhynchus 
  are 
  

   arranged 
  exactly 
  as 
  in 
  the 
  Aust 
  specimen, 
  as 
  shown 
  by 
  a 
  

   Liassic 
  skull 
  in 
  the 
  British 
  Museum 
  (no. 
  P. 
  428) 
  ; 
  and 
  it 
  

   still 
  remains 
  for 
  future 
  discoveries 
  to 
  make 
  known 
  the 
  

   generic 
  differences 
  (if 
  any) 
  between 
  the 
  two 
  early 
  Mesozoic 
  

   forms 
  just 
  compared. 
  

  

  EXPLANATION 
  OF 
  PLATE 
  XIV. 
  

  

  Fig. 
  1. 
  Acrodus 
  keuperinus 
  (Mulch. 
  & 
  Strickl.) 
  ; 
  naturally 
  arranged 
  teeth. 
  

   — 
  Upper 
  Keuper 
  ; 
  Shrewley, 
  Warwickshire. 
  Collection 
  of 
  the 
  

   Eev. 
  P. 
  B. 
  Brodie, 
  M.A., 
  F.G.S., 
  Rowington 
  Vicarage, 
  War- 
  

   wick. 
  

  

  Fiy. 
  2. 
  Ditto 
  ; 
  naturally 
  arranged 
  teeth. 
  — 
  Ibid. 
  Same 
  collection. 
  

  

  Figs. 
  2a, 
  b. 
  Ditto; 
  two 
  teeth 
  of 
  the 
  last 
  specimen, 
  outer 
  aspect, 
  twice 
  

   nat. 
  size. 
  

  

  Fiys. 
  3, 
  3 
  a. 
  Ditto 
  ; 
  tooth, 
  outer 
  and 
  coronal 
  aspects, 
  twice 
  nat. 
  size. 
  — 
  

   Ibid. 
  Same 
  collection. 
  

  

  Fiys. 
  4, 
  5. 
  Dipludus 
  Moorei, 
  sp. 
  nov. 
  ; 
  two 
  teeth, 
  outer 
  and 
  inner 
  aspects, 
  

   twice 
  nat. 
  size. 
  — 
  Keuper; 
  Ruishton, 
  near 
  Taunton. 
  Moore 
  

   Collection, 
  Bath 
  Museum. 
  

  

  Fiys. 
  6 
  a~c. 
  Symmetrical 
  Hybodont 
  tooth 
  ; 
  outer, 
  inner, 
  lateral, 
  and 
  in- 
  

   ferior 
  aspects. 
  — 
  Oxford 
  Clay, 
  Peterborough. 
  Collection 
  of 
  

   Alfred 
  N. 
  Leeds, 
  Esq., 
  Eyebury, 
  Peterborough. 
  

  

  Fiys. 
  7, 
  8, 
  8 
  a. 
  Saurichthys 
  acuminatus, 
  Agass. 
  ; 
  left 
  maxilla, 
  outer 
  and 
  

   inner 
  aspects 
  and 
  section. 
  — 
  Rhoetic 
  ; 
  Aust 
  Cliff. 
  Collection 
  of 
  

   the 
  Rev. 
  G. 
  Hope 
  Dixon, 
  M.A., 
  Compton 
  Greenfield 
  Rectory, 
  

   Bristol. 
  

  

  [Unless 
  otherwise 
  stated, 
  the 
  figures 
  are 
  of 
  the 
  natural 
  size.] 
  

  

  * 
  R. 
  Owen, 
  'Anatomy 
  of 
  Vertebrates,' 
  vol. 
  i. 
  p. 
  118. 
  

  

  + 
  H. 
  von 
  Meyer, 
  Palteontogr. 
  vol. 
  i. 
  (1849), 
  p. 
  201, 
  pi. 
  xxxi. 
  figs. 
  29- 
  

   32 
  ; 
  K. 
  Martin, 
  Zeitschr. 
  deutsch. 
  geol. 
  Ges. 
  vol. 
  xxv. 
  (1873), 
  p. 
  725, 
  

   pi. 
  xxii. 
  figs, 
  xiv, 
  xv 
  (Stylo 
  rhynchus). 
  

  

  