﻿PROCEEDINGS 
  OE 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  1 
  3 
  

  

  C. 
  minimus, 
  Lobodus 
  prototypus, 
  L. 
  'planus, 
  Mesogomphus 
  lingua, 
  

   Pleuragomphus 
  auriculatus, 
  Phymodus 
  transversus, 
  P. 
  oblongus, 
  Cha- 
  

   racodus 
  angulatus, 
  C. 
  lunatus, 
  Pinacodus 
  gonoplax, 
  P. 
  gelasi, 
  Dimy- 
  

   leus 
  Woodi, 
  Mylax 
  batoides, 
  Mylacodus 
  quadratics, 
  M. 
  Sesarma, 
  

   Homalodus 
  trapeziformis, 
  H. 
  quadratus, 
  Petalodus 
  quadratics, 
  P. 
  re- 
  

   curvus, 
  P. 
  inozquilateralis,Polyrliizodus 
  magnus, 
  P. 
  Colei,P. 
  elongatus, 
  

   P. 
  sinuosus, 
  P. 
  attenuatus, 
  P. 
  constrictus, 
  Chomatodus 
  linearis, 
  C. 
  

   acutus, 
  Glossodus 
  marginatus, 
  Harpacodus 
  dentatus, 
  H. 
  davatus, 
  

   Streblodus 
  oblongus, 
  S. 
  Colei, 
  S. 
  Egertoni, 
  Deltodus 
  sublosvis, 
  , 
  D. 
  ex- 
  

   pansus, 
  D. 
  nobilis, 
  Deltoptychius 
  acutus, 
  D. 
  gibberulus, 
  Sandalodus 
  

   Morrisii, 
  Psephodus 
  magnus, 
  Poecilodus 
  Jonesii, 
  P. 
  gibbosus, 
  Tomodus 
  

   convexus, 
  Xystrodus 
  striatus, 
  X. 
  angustus, 
  X. 
  Egertoni, 
  Helodus 
  

   crassus, 
  H. 
  tenuis, 
  H. 
  davatus, 
  H. 
  dilatatus, 
  H. 
  acutus, 
  H. 
  rich- 
  

   mondensis, 
  H. 
  triangularis, 
  H. 
  biconus, 
  H. 
  expansus, 
  Rhampliodus 
  

   disjoar, 
  Petalorhynchus 
  psittacinus, 
  Pristodus 
  falcatus. 
  

  

  Discussion. 
  

  

  Prof. 
  Seeley 
  suggested 
  that 
  in 
  the 
  fang-like 
  portions 
  of 
  the 
  teeth 
  

   in 
  Polyrhizodus 
  we 
  have 
  indications 
  of 
  an 
  analogy 
  with 
  the 
  Bays, 
  

   and 
  that 
  the 
  teeth 
  may 
  have 
  followed 
  each 
  other 
  in 
  series. 
  He 
  

   thought 
  that 
  mauy 
  forms 
  relegated 
  to 
  different 
  genera 
  and 
  species 
  

   might 
  belong 
  to 
  the 
  same 
  palate. 
  He 
  spoke 
  of 
  a 
  similar 
  variety 
  

   of 
  form 
  being 
  exhibited 
  in 
  the 
  teeth 
  referred 
  to 
  CocJdiodus. 
  He 
  

   referred 
  to 
  the 
  difficulty 
  of 
  dealing 
  with 
  the 
  remains 
  which 
  had 
  

   been 
  thought 
  to 
  be 
  allied 
  to 
  the 
  Diodon. 
  

  

  The 
  President 
  testified 
  to 
  the 
  great 
  labour 
  undertaken 
  by 
  Mr. 
  

   Davis 
  in 
  investigating 
  the 
  large 
  collection 
  of 
  fossils 
  brought 
  together 
  

   by 
  the 
  Earl 
  of 
  Enniskillen. 
  Apart 
  from 
  the 
  determination 
  of 
  the 
  

   analogies 
  of 
  these 
  forms, 
  the 
  naming 
  and 
  description 
  of 
  these 
  charac- 
  

   teristic 
  fossils 
  would 
  be 
  of 
  great 
  service 
  to 
  stratigraphical 
  geologists. 
  

  

  The 
  Author 
  admitted 
  that 
  some 
  of 
  the 
  forms 
  described 
  might 
  

   belong 
  to 
  the 
  same 
  palate 
  ; 
  but 
  until 
  actual 
  evidence 
  of 
  this 
  was 
  

   produced, 
  he 
  maintained 
  that 
  they 
  ought 
  to 
  be 
  described 
  and 
  receive 
  

   distinctive 
  names. 
  Many 
  of 
  the 
  names 
  had 
  been 
  attached 
  to 
  these 
  

   fossils 
  by 
  Agassiz. 
  He 
  mentioned 
  the 
  discovery 
  of 
  Worthen 
  that 
  

   the 
  teeth 
  referred 
  to 
  the 
  genera 
  Cochliodus 
  and 
  Helodus 
  occur 
  asso- 
  

   ciated 
  in 
  the 
  same 
  jaw 
  in 
  an 
  American 
  specimen. 
  He 
  thought 
  many 
  

   of 
  the 
  teeth 
  were 
  not 
  palatal 
  teeth, 
  but 
  were 
  inserted 
  in 
  or 
  on 
  the 
  

   rami 
  of 
  the 
  jaws. 
  

  

  2. 
  "On 
  an 
  extinct 
  Chelonian 
  Beptile 
  (Notochelys 
  costata, 
  Owen) 
  

   from 
  Australia." 
  By 
  Prof. 
  Owen, 
  C.B., 
  P.B.S., 
  F.G.S. 
  

  

  3. 
  "On 
  the 
  Upper 
  Beds 
  of 
  the 
  Pifeshire 
  Coal-Measures/' 
  By 
  the 
  

   late 
  E. 
  W. 
  Binncy, 
  Esq., 
  P.B.S., 
  P.G.S., 
  and 
  James 
  "VV. 
  Kirkby, 
  Esq. 
  

  

  Specimens 
  were 
  exhibited 
  by 
  Messrs. 
  Davis 
  and 
  Kirkby 
  in 
  illus- 
  

   tration 
  of 
  their 
  papers. 
  

  

  