﻿134 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  The 
  coast 
  section 
  at 
  Cap 
  de 
  la 
  Heve 
  presents 
  an 
  exact 
  resemblance 
  

   to 
  the 
  series 
  at 
  Weymouth 
  and 
  Osmington, 
  "so 
  close," 
  observes 
  Mr. 
  

   Blake, 
  " 
  that 
  almost 
  bed 
  for 
  bed 
  can 
  be 
  recognized 
  ; 
  and 
  the 
  whole 
  

   becomes, 
  therefore, 
  an 
  admirable 
  term 
  of 
  comparison 
  between 
  the 
  

   French 
  and 
  English 
  rocks, 
  if 
  only," 
  as 
  Mr. 
  Blake 
  suggests, 
  " 
  the 
  

   development 
  in 
  each 
  country 
  could 
  be 
  correlated 
  respectively 
  with 
  

   these.' 
  ' 
  An 
  elaborate 
  analysis 
  follows, 
  in 
  which 
  the 
  author 
  dis- 
  

   cusses 
  the 
  affinities 
  and 
  differences 
  between 
  the 
  faunas 
  of 
  the 
  two 
  

   countries 
  (loc. 
  cit. 
  pp. 
  548-554). 
  

  

  IV. 
  The 
  Pays 
  de 
  Bray. 
  

  

  The 
  early 
  work 
  of 
  Graves 
  upon 
  this 
  district 
  (' 
  Essai 
  sur 
  la 
  Topo- 
  

   graphic 
  Geognostique 
  du 
  departement 
  de 
  l'Oise,' 
  1847) 
  has 
  been 
  

   superseded 
  by 
  the 
  splendid 
  monograph 
  of 
  M. 
  de 
  Lapparent 
  ( 
  ; 
  Lo 
  

   Pays 
  de 
  Bray,' 
  187*3), 
  published 
  as 
  one 
  of 
  the 
  memoirs 
  of 
  the 
  

   Geological 
  Survey 
  of 
  France. 
  M. 
  de 
  Lapparent's 
  classification 
  is- 
  

   as 
  follows 
  : 
  — 
  

  

  Upper 
  Portland. 
  

   Ferruginous 
  Sandstone, 
  Speckled 
  Clays, 
  Green 
  sand. 
  

  

  Middle 
  Portland. 
  

   Blue 
  Marls. 
  

  

  Lower 
  Portland. 
  

  

  1. 
  Upper 
  Conglomerate. 
  

  

  2. 
  Glauconitic 
  Calcareous 
  Grit. 
  

  

  3. 
  Marly 
  Limestones. 
  

  

  4. 
  Calcareous 
  Grit 
  Avith 
  Anomia. 
  

  

  5. 
  Beds 
  with 
  Ostrea 
  catalaunica. 
  

  

  Kimmeridgian. 
  

  

  1. 
  Upper 
  Clays 
  and 
  Lumachelles. 
  

  

  2. 
  Compact 
  Lithographic 
  Limestone. 
  

  

  3. 
  Lower 
  Clays 
  and 
  Lumachelles. 
  

  

  4. 
  Calcareous 
  Grit 
  (Pterocerian 
  or 
  Astartian). 
  

  

  Prof. 
  Blake 
  has 
  verified 
  the 
  accuracy 
  of 
  Lapparent's 
  description 
  

   and 
  the 
  general 
  correctness 
  of 
  the 
  correlation. 
  Exceptions, 
  in 
  one 
  

   or 
  two 
  instances, 
  are 
  taken 
  and 
  discussed 
  by 
  Mr. 
  Blake 
  (loc. 
  cit. 
  

   pp. 
  555-557). 
  

  

  Y. 
  The 
  Boulonnais. 
  

  

  M. 
  Kigaux 
  in 
  1865, 
  M. 
  Hebert 
  in 
  1866, 
  and 
  MM. 
  de 
  Loriol 
  and 
  

   Pellat, 
  in 
  five 
  separate 
  memoirs 
  or 
  monographs 
  from 
  1866 
  to 
  1876, 
  

   have 
  largely 
  contributed 
  to 
  the 
  history 
  of 
  this 
  remarkable 
  area. 
  

   M. 
  Pellat, 
  in 
  1878, 
  gave 
  a 
  general 
  and 
  final 
  summary 
  of 
  his 
  views 
  

   (' 
  Resume 
  d'une 
  description 
  du 
  terrain 
  jurassique 
  superieur 
  du 
  Bas 
  

   Boulonnais,' 
  1878). 
  His 
  classification 
  is 
  as 
  follows 
  (loc. 
  cit. 
  p. 
  558): 
  — 
  

  

  1. 
  Upper- 
  Portland 
  in 
  4 
  divisions, 
  yielding 
  Cardium 
  dissimile, 
  Katica 
  elcgans, 
  

  

  and 
  Cardium 
  Pellati. 
  

  

  2. 
  Middle 
  Portland 
  in 
  2 
  divisions, 
  yielding 
  Ostrea 
  cxpansa 
  and 
  CardhiM 
  

  

  Morinicum. 
  

  

  