﻿ANNIVEKSAEY. 
  ADDEESS 
  OE 
  THE 
  PRESIDENT. 
  135 
  

  

  o. 
  Lower 
  Portland. 
  Zone 
  of 
  Cyprina 
  Brongniarti 
  in 
  3 
  divisions, 
  with 
  Ptero- 
  

   cera 
  oceani, 
  Natica 
  Marcousana, 
  and 
  Trigonia 
  

   Pellati. 
  

  

  3a. 
  Idem. 
  Zone 
  of 
  Amm. 
  gigas 
  in 
  2 
  divisions, 
  with 
  Am. 
  yorilandicus 
  and 
  

   Hemicidaris 
  purbeckensis. 
  

  

  4. 
  Upper 
  Kimnieridgian. 
  Zone 
  of 
  Ammonites 
  erinus 
  in 
  2 
  divisions, 
  with 
  Am. 
  

  

  erinus 
  and 
  Py 
  gurus. 
  

  

  5. 
  Middle 
  Kimmeridgian. 
  Zone 
  of 
  Amm. 
  caletanus 
  in 
  2 
  divisions, 
  the 
  upper 
  

  

  part 
  with 
  Amm. 
  caletanus. 
  

  

  6. 
  Lower 
  Kimmeridgian. 
  Zone 
  of 
  Amm. 
  orthoceras 
  in 
  2 
  divisions, 
  upper 
  part 
  

  

  with 
  Amm. 
  orthoceras. 
  

  

  7. 
  Sequanian, 
  in 
  6 
  divisions, 
  Ost. 
  deltoidea, 
  Nerin&a, 
  and 
  Trigonia 
  Bronnii. 
  

  

  8. 
  Oorallian, 
  Coral 
  Eag, 
  with 
  Cidaris 
  florigemma, 
  and 
  3 
  divisions 
  with 
  

  

  Isocardia 
  and 
  TerebratidcB. 
  

  

  9. 
  Upper 
  Oxfordian 
  in 
  2 
  divisions, 
  with 
  Pseudodiadema 
  lieddingtonensc 
  and 
  

  

  Amm. 
  Martelli 
  and 
  Sponges. 
  

  

  10. 
  Middle 
  Oxfordian 
  in 
  2 
  divisions, 
  with 
  Ostrea 
  dilatata. 
  

  

  11. 
  Lower 
  Oxfordian 
  in 
  3 
  divisions, 
  with 
  Ammonites 
  Lamberti, 
  Amm. 
  JDuncani. 
  

  

  and 
  Amm. 
  calloviensis. 
  

  

  These 
  eleven 
  divisions 
  are 
  discussed 
  by 
  Prof. 
  Blake 
  through 
  pages 
  

   559 
  to 
  566. 
  I 
  cannot 
  do 
  more 
  than 
  refer 
  to 
  these 
  eight 
  pages, 
  

   which 
  teem 
  with 
  important 
  correlative 
  matter. 
  From 
  page 
  567 
  

   to 
  587 
  the 
  author 
  discusses 
  the 
  results 
  of 
  his 
  investigations, 
  and 
  

   proposes 
  to 
  classify 
  the 
  rocks 
  he 
  has 
  so 
  carefully 
  examined 
  in 
  the 
  

   Paris 
  basin 
  under 
  five 
  heads 
  : 
  — 
  

  

  1. 
  The 
  Portlandian. 
  

   Upper 
  = 
  Purbeck. 
  

  

  Lower 
  = 
  Portland 
  Limestone. 
  

  

  2. 
  Bolonian. 
  

  

  Upper 
  = 
  Middle 
  Portland. 
  

   Lower 
  = 
  Lower 
  Portland. 
  

  

  3. 
  Kimmeridgian. 
  

   Virgulian. 
  

   Pterocerian. 
  

   Astartian. 
  

  

  4. 
  Oorallian. 
  

   Supraeoralline. 
  

   Coral 
  Eag. 
  

   Coralline 
  Oolite. 
  

  

  5. 
  Oxfordi 
  

  

  an 
  

  

  TT 
  / 
  Oxford 
  Oolite. 
  

  

  Uppers 
  {oxford 
  Grit. 
  

   Lower 
  = 
  Oxford 
  Clay. 
  

  

  Mr. 
  Blake 
  discusses 
  the 
  upper 
  limit 
  of 
  the 
  Oxfordian 
  group 
  ; 
  the 
  

   French 
  and 
  English 
  classifications 
  do 
  not 
  agree. 
  The 
  English 
  Lower 
  

   Calcareous 
  Grit 
  and 
  part 
  of 
  our 
  Coralline 
  Oolite 
  are, 
  in 
  Prance, 
  

   universally 
  placed 
  in 
  the 
  Oxfordian 
  (vide 
  pp. 
  567-570). 
  He 
  next 
  

   describes 
  the 
  Corallian 
  series 
  and 
  the 
  relations 
  of 
  the 
  Euglish 
  beds 
  

   to 
  those 
  of 
  Prance 
  ; 
  pp. 
  570-577 
  are 
  devoted 
  to 
  this 
  division 
  ; 
  

   pp. 
  577-580 
  and 
  the 
  remainder 
  of 
  this 
  elaborate 
  memoir 
  conclude 
  

   with 
  the 
  Bolonian 
  and 
  Portlandian 
  rocks 
  and 
  their 
  correlation. 
  

  

  