﻿ANNIVERSARY 
  ADDRESS 
  OE 
  THE 
  PRESIDENT. 
  1 
  99 
  

  

  ™ 
  , 
  . 
  f 
  Testudo 
  1 
  species. 
  

  

  Chdonm 
  {Chelys 
  1 
  „ 
  

  

  n 
  j. 
  v 
  f 
  Teleosaurus 
  3 
  „ 
  

  

  Crocodiha......| 
  Sfcreptosponclylus 
  ^ 
  2 
  » 
  

  

  Ichthyosauria 
  . 
  . 
  Ichthyosaurus 
  .... 
  2 
  „ 
  

  

  Plesiosauria 
  .... 
  Plesiosaurus 
  1 
  „ 
  

  

  p, 
  . 
  J 
  Pterodactylus 
  .... 
  3 
  „ 
  

  

  \ 
  Khamphorynchus 
  . 
  . 
  3 
  „ 
  

  

  {Megalosaurus 
  .... 
  3 
  „ 
  

  

  Ceteosaurus 
  5 
  „ 
  

  

  Cardiodon 
  1 
  ,, 
  

  

  Oolithes 
  1 
  „ 
  

  

  Lacerta 
  1 
  „ 
  

  

  Mammalia. 
  — 
  4 
  genera 
  with 
  6 
  species 
  have 
  been 
  recognized 
  in 
  the 
  

   Stonesfield 
  Slate 
  of 
  Stonesfield, 
  namely, 
  Amphilestes, 
  Amphitherium, 
  

   Phascolotherium, 
  and 
  Stereognathus. 
  These 
  were 
  the 
  first 
  discovered 
  

   proofs 
  of 
  the 
  existence 
  of 
  warm-blooded 
  quadrupeds 
  in 
  the 
  British 
  

   strata; 
  since 
  then 
  Microlestes 
  antiquus 
  and 
  Hypsiprymnopsisl 
  

   have 
  been 
  discovered 
  in 
  the 
  Upper 
  Triassic 
  rocks. 
  Microlestes 
  finds 
  

   its 
  nearest 
  ally 
  amongst 
  existing 
  mammals 
  in 
  the 
  marsupial 
  and 
  

   insectivorous 
  Myrmecobius, 
  or 
  Banded 
  Anteater, 
  of 
  Australia 
  ; 
  teeth 
  

   only 
  of 
  Microlestes 
  have 
  as 
  yet 
  occurred. 
  Prof. 
  Owen 
  divides 
  the 
  

   Marsupialia 
  into 
  two 
  primary 
  groups, 
  the 
  Diprotodontia 
  and 
  Poly- 
  

   protodontia. 
  The 
  living 
  Diprotodonts 
  embrace 
  the 
  herbivorous 
  

   Macropodidce, 
  Phascolomys, 
  Hypsiprymnus, 
  and 
  the 
  Phalangistidce. 
  

   The 
  Polyprotodonts 
  Perameles, 
  Didelphidce, 
  Myrmecobius, 
  Dasyurus, 
  

   and 
  Thylacinus 
  are 
  carnivorous. 
  Both 
  these 
  habits 
  may 
  also 
  be 
  

   ascribed 
  to 
  the 
  fossil 
  forms, 
  the 
  characters 
  of 
  the 
  teeth 
  in 
  the 
  fossil 
  

   as 
  well 
  as 
  in 
  the 
  living 
  forms 
  being 
  conclusive 
  evidence. 
  

  

  Amphitherium, 
  from 
  the 
  Stonesfield 
  Slate, 
  is 
  related 
  to 
  the 
  

   living 
  Myrmecobius. 
  Amphilestes 
  and 
  Phascolotherium 
  were 
  also 
  

   insectivorous 
  Marsupials, 
  Phascolotherium 
  finding 
  its 
  nearest 
  living 
  

   ally 
  in 
  the 
  American 
  Opossums. 
  Stereognathus 
  stands 
  in 
  a 
  dubious 
  

   position 
  ; 
  possibly 
  it 
  may 
  be 
  " 
  placental." 
  

  

  The 
  association 
  of 
  the 
  Marsupialia 
  then, 
  as 
  now, 
  with 
  a 
  peculiar 
  

   land 
  flora 
  (Araucarise 
  and 
  Cycadeae), 
  and 
  the 
  presence 
  in 
  the 
  Jurassic 
  

   seas 
  of 
  the 
  Cestraciontidse 
  and 
  the 
  Molluscan 
  genus 
  Trigonia 
  (now 
  ex- 
  

   clusively 
  confined 
  to 
  the 
  Australian 
  seas), 
  tend 
  to 
  show 
  that 
  in 
  

   England 
  at 
  the 
  time 
  of 
  the 
  deposition 
  of 
  the 
  Great 
  Oolite 
  or 
  the 
  

   Stonesfield 
  Slate 
  there 
  must 
  have 
  been 
  both 
  a 
  fauna 
  and 
  a 
  flora 
  re- 
  

   sembling 
  in 
  a 
  remarkable 
  manner 
  those 
  now 
  occurring 
  in 
  Australia. 
  

  

  For 
  the 
  Analysis 
  of 
  the 
  Great-Oolite 
  species 
  see 
  Table 
  XXXIII. 
  

   p. 
  200. 
  

  

  