﻿A2STNTVERSAHY 
  ADDRESS 
  OP 
  XUE 
  PRESIDENT. 
  2 
  I 
  7 
  

  

  Gasteropoda. 
  — 
  "With 
  the 
  exception 
  of 
  7 
  species, 
  the 
  whole 
  of 
  the 
  67 
  

   known 
  species 
  are 
  confined 
  to 
  the 
  Corallian 
  rocks. 
  Pleurotomaria 
  

   reticulata 
  passes 
  to 
  the 
  Kinimeridge 
  Clay. 
  The 
  only 
  species 
  

   uniting 
  the 
  Oxford 
  Clay 
  and 
  Coral 
  Rag 
  is 
  Littorina 
  muricata 
  ; 
  but 
  

   o 
  of 
  the 
  Kellaways 
  species 
  bridge 
  over 
  the 
  Oxford 
  Clay 
  and 
  reappear 
  

   in 
  the 
  Corallian 
  ; 
  they 
  are 
  Pleurotomaria 
  granidata, 
  Dentalium 
  an- 
  

   nidatum, 
  D. 
  entaloideum, 
  Alaria 
  bispinosa, 
  and 
  Actceon 
  retusus. 
  No 
  

   species 
  passes 
  to 
  the 
  Portland 
  Oolite. 
  Probably 
  in 
  no 
  other 
  horizon 
  

   in 
  the 
  British 
  rocks 
  are 
  the 
  Gasteropoda 
  so 
  distinctive 
  of 
  the 
  beds 
  

   they 
  occupy 
  ; 
  for 
  we 
  have 
  seen 
  that 
  out 
  of 
  the 
  67 
  species 
  known 
  

   60 
  are 
  peculiar 
  to 
  or 
  characteristic 
  of 
  the 
  Corallian 
  beds. 
  

  

  Cephalopoda. 
  Ammonites. 
  — 
  21 
  species 
  occur, 
  9 
  of 
  which 
  are 
  

   essentially 
  Corallian 
  ; 
  they 
  are 
  A. 
  anceps-albus, 
  A. 
  JBabeanus, 
  

   A. 
  cadonensis, 
  A. 
  rupellensis, 
  A. 
  plicatUis, 
  A. 
  pseudo-cordatus, 
  A. 
  

   retroflexus, 
  A. 
  Sutherlandice 
  (goliathus), 
  and 
  A. 
  Williamsoni. 
  11 
  

   of 
  the 
  21 
  species 
  also 
  occur 
  in 
  the 
  Oxford 
  Clay, 
  and 
  2 
  pass 
  up 
  to 
  

   the 
  Kimmeridge 
  Clay 
  {A. 
  acliilles 
  and 
  A. 
  longispinus). 
  Only 
  one 
  

   species, 
  A. 
  macrocephalus, 
  connects 
  the 
  Lower 
  and 
  Middle 
  Oolitic 
  

   rocks 
  ; 
  the 
  only 
  5 
  Ammonites 
  that 
  occur 
  in 
  or 
  range 
  all 
  through 
  

   three 
  of 
  the 
  Middle 
  Oolite 
  divisions 
  are 
  A. 
  alligatus, 
  A. 
  Buncani, 
  

   A. 
  Gulielmi, 
  A. 
  perarmatus, 
  and 
  A. 
  placenta; 
  and 
  only 
  5 
  connect 
  

   the 
  Middle 
  and 
  Upper 
  Oolites, 
  in 
  which 
  latter 
  there 
  are 
  31 
  species 
  ; 
  

   these 
  last 
  are 
  A. 
  acliilles, 
  A. 
  anceps, 
  A. 
  annularis, 
  A. 
  Lamberti, 
  and 
  

   A. 
  longispinus, 
  and 
  they 
  do 
  not 
  pass 
  above 
  the 
  Kimmeridge 
  Clay. 
  

   Every 
  care 
  has 
  been 
  taken 
  with 
  reference 
  to 
  the 
  details 
  and 
  ana- 
  

   lysis 
  of 
  the 
  above 
  species. 
  

  

  Nautili. 
  — 
  Nautilus 
  liexagonus 
  is 
  the 
  only 
  species 
  in 
  the 
  Corallian 
  

   beds 
  ; 
  it 
  had 
  previously 
  occurred 
  in 
  the 
  Cornbrash 
  and 
  Kellaways 
  

   Hock. 
  

  

  Belemnites. 
  — 
  B. 
  abbreviates 
  with 
  its 
  two 
  varieties, 
  B. 
  oxyrhynchus 
  

   and 
  B. 
  cxcentricus, 
  and 
  B. 
  hastatus 
  constitute 
  all 
  the 
  known 
  Dibran- 
  

   chiata. 
  B. 
  abbreviatus 
  also 
  appears 
  in 
  the 
  Kimmeridge 
  Clay 
  above. 
  

  

  Pisces. 
  — 
  Gyrodus 
  Cuvieri, 
  G. 
  punctatus, 
  and 
  Hybodus 
  obtusus 
  are 
  

   all 
  that 
  have 
  occurred 
  of 
  this 
  class. 
  

  

  Eeptilia. 
  — 
  Clielys 
  Blahii, 
  Megalosaurus 
  Bucldandi, 
  and 
  Plio- 
  

   saurus 
  are 
  the 
  only 
  representatives, 
  and 
  these 
  illustrate 
  three 
  orders 
  

   — 
  the 
  Chelonia, 
  Dinosauria, 
  and 
  Enaliosauria 
  or 
  Saui-qpterygia. 
  

   Megalosaurus 
  and 
  Pliosaurus 
  also 
  occur 
  in 
  the 
  Oxford 
  Clay. 
  

  

  Mammalia. 
  — 
  None 
  known. 
  

  

  [For 
  the 
  Analysis 
  of 
  the 
  Corallian 
  species 
  see 
  Table 
  XXXVIII., 
  

   p. 
  218.] 
  

  

  