﻿ANNIVERSARY 
  ADDRESS 
  OF 
  THE 
  PRESIDENT. 
  1 
  97 
  

  

  The 
  Kellaways 
  Rock 
  has 
  a 
  solitary 
  species, 
  Strophodus 
  radiato-punc- 
  

   tatus. 
  The 
  Oxford 
  Clay 
  yields 
  4 
  species, 
  the 
  Coralline 
  Oolite 
  3, 
  the 
  

   Kimmeridge 
  Clay 
  11 
  genera 
  and 
  14 
  species, 
  and 
  the 
  Portland 
  Oolite 
  

   4 
  genera 
  and 
  5 
  species, 
  which 
  I 
  will 
  refer 
  to 
  under 
  their 
  respective 
  

   formations. 
  

  

  Eeptilia. 
  — 
  13 
  genera 
  and 
  27 
  species, 
  both 
  terrestrial 
  and 
  marine, 
  

   occur 
  in 
  the 
  Great-Oolite 
  strata. 
  Some 
  of 
  the 
  most 
  gigantic 
  forms 
  

   that 
  have 
  inhabited 
  the 
  globe 
  lived 
  during 
  the 
  time 
  when 
  the 
  beds 
  

   composing 
  the 
  Great 
  Oolite 
  were 
  being 
  deposited 
  ; 
  but 
  the 
  position 
  of 
  

   the 
  land 
  on 
  which 
  the 
  huge 
  terrestrial 
  Dinosaurs 
  lived 
  we 
  have 
  yet 
  

   to 
  determine. 
  The 
  13 
  known 
  genera 
  are 
  : 
  — 
  

  

  Testudo. 
  Khamphorhynchus. 
  

  

  Chelys. 
  Megalosaurus. 
  

  

  Teleosaurus. 
  Ceteosaurus. 
  

  

  Streptospondylus. 
  Cardiodon. 
  

  

  Ichthyosaurus. 
  Oolithes 
  (?). 
  

  

  Plesiosaurus. 
  Lacerta. 
  

   Pterodactylus. 
  

  

  Chelonia. 
  — 
  Regarding 
  these 
  zoologically, 
  the 
  Chelonia 
  are 
  repre- 
  

   sented 
  by 
  Testudo 
  Striclclandi, 
  Phill., 
  and 
  Chelys 
  BlaJcii 
  from 
  the 
  

   Stonesfield 
  Slate, 
  the 
  former 
  believed 
  to 
  be 
  a 
  terrestrial 
  species 
  ; 
  

   scutes 
  and 
  a 
  short 
  phalangeal 
  bone 
  are 
  all 
  that 
  are 
  known. 
  The 
  

   second 
  genus, 
  Chelys, 
  was 
  found 
  in 
  the 
  Stonesfield 
  beds 
  in 
  1863. 
  

  

  Crocodilia. 
  — 
  Teleosaurus, 
  Streptospondylus, 
  and 
  Steneosaurus 
  all 
  

   occur 
  in 
  the 
  Jurassic 
  rocks 
  ; 
  but 
  only 
  the 
  two 
  former 
  genera 
  in 
  the 
  

   Great 
  Oolite. 
  Steneosaurus, 
  with 
  one 
  exception 
  (S. 
  brevior) 
  in 
  the 
  

   Upper 
  Lias, 
  is 
  a 
  Kimmeridgian 
  genus, 
  in 
  which 
  five 
  species 
  occur. 
  

   Streptospondylus 
  Cuvieri 
  and 
  an 
  unnamed 
  species 
  occur 
  in 
  the 
  Great 
  

   Oolite 
  or 
  Stonesfield 
  Slate, 
  and 
  the 
  same 
  in 
  the 
  Oxford 
  Clay. 
  

  

  Prof. 
  Owen 
  divides 
  the 
  Crocodilia 
  into 
  three 
  suborders, 
  the 
  Procoelia, 
  

   Amphicoelia, 
  aud 
  Opisthocoelia. 
  Prof. 
  Huxley 
  proposes 
  a 
  more 
  

   elaborate 
  classification 
  for 
  the 
  Crocodilia 
  : 
  1. 
  The 
  Parasuchia, 
  2. 
  the 
  

   Mesosuchia, 
  and 
  3. 
  the 
  Eusuchia. 
  Only 
  his 
  second 
  group, 
  the 
  Me- 
  

   sosuchia, 
  concerns 
  us, 
  in 
  which 
  are 
  placed 
  the 
  genera 
  Streptospondylus 
  

   and 
  Teleosaurus, 
  both 
  of 
  which 
  occur 
  in 
  the 
  Great 
  Oolite. 
  (Pelago- 
  

   saurus, 
  Teleidosaurus, 
  Macrospondylus, 
  and 
  Metriorhynchus 
  are 
  not 
  

   known 
  as 
  British.) 
  The 
  amphicoelian 
  genus 
  Teleosaurus 
  is 
  represented 
  

   by 
  3 
  species 
  — 
  T. 
  brevidens, 
  T.cadomensis, 
  and 
  T. 
  subulidens, 
  occurring 
  

   in 
  the 
  Stonesfield 
  Slate 
  and 
  in 
  the 
  higher 
  calcareous 
  divisions 
  of 
  the 
  

   Great 
  Oolite 
  at 
  Enslow 
  Bridge 
  near 
  Oxford. 
  The 
  extinct 
  amphicoelian 
  

   Crocodiles 
  are 
  confined 
  entirely 
  to 
  the 
  Mesozoic 
  period. 
  Palseonto- 
  

   logically 
  considered 
  they 
  are 
  the 
  most 
  important 
  group 
  of 
  the 
  order 
  

   Crocodilia; 
  they 
  are 
  also 
  its 
  most 
  ancient 
  representatives. 
  The 
  

   Trias 
  yields 
  the 
  earliest 
  types 
  through 
  Stagonolepis 
  and 
  Belodon. 
  

   The 
  home 
  of 
  the 
  amphicoelian 
  Crocodiles 
  is 
  in 
  the 
  Jurassic 
  series, 
  

   in 
  which 
  the 
  most 
  important 
  genera 
  are 
  Teleosaurus 
  and 
  Strepto- 
  

   spondylus. 
  

  

  Ichihyopterygia 
  (Owen), 
  Ichthyosauria 
  (Huxley). 
  — 
  2 
  species 
  occur, 
  

   Ichthyosaurus 
  advena 
  and 
  /. 
  erraticus, 
  in 
  the 
  Stonesfield 
  Slate 
  and 
  beds 
  

   above. 
  The 
  Ichthyopterygia 
  include 
  only 
  this 
  one 
  genus. 
  The 
  remains 
  

  

  