﻿ANNIVEKSARY 
  ADDRESS 
  OF 
  THE 
  PRESIDENT. 
  1 
  45 
  

  

  at 
  Harsburg, 
  Liebenburg, 
  Bodenstein, 
  &c, 
  are 
  on 
  this 
  horizon. 
  At 
  

   the 
  foot 
  of 
  the 
  Swabian 
  Alps, 
  in 
  South-western 
  German)*, 
  the 
  Numis- 
  

   malis-Marls 
  contain 
  the 
  type 
  fossils 
  of 
  the 
  British 
  equivalents. 
  In 
  

   Prance 
  the 
  Jamesoni-beds 
  occur, 
  and 
  are 
  well 
  developed 
  in 
  several 
  of 
  

   the 
  departments. 
  In 
  Normandy 
  Deslongchamps 
  includes 
  them 
  in 
  

   the 
  ' 
  Calcaires 
  et 
  Marnes 
  a 
  Terebrattda 
  nwmismalis.' 
  In 
  the 
  Cote 
  d'Or 
  

   Collenot 
  describes 
  the 
  Jamesoni-beds, 
  and 
  divides 
  the 
  Middle 
  Lias 
  

   into 
  4 
  zones, 
  according 
  to 
  the 
  prevailing 
  Ammonites, 
  'in 
  descending 
  

   order 
  :— 
  

  

  The 
  zone 
  of 
  JEgoccras 
  Henleyi 
  ; 
  

  

  The 
  zone 
  of 
  JBgoceras 
  Davcei 
  ; 
  

  

  The 
  zone 
  of 
  ^Egoceras 
  venarense 
  ; 
  

  

  The 
  zone 
  of 
  JEgoceras 
  Valdani. 
  

  

  In 
  the 
  departments 
  of 
  the 
  Cher 
  and 
  Aveyron 
  Lytoceras 
  jimbriatum, 
  

   Amaltheus 
  margaritatus, 
  and 
  JEgoceras 
  Jamesoni 
  hold 
  their 
  respective 
  

   positions. 
  In 
  the 
  department 
  and 
  basin 
  of 
  the 
  Rhone, 
  Dumortier 
  

   shows 
  the 
  extensive 
  development 
  of 
  this 
  division, 
  and 
  divides 
  the 
  

   Middle 
  Lias 
  of 
  the 
  Bhone 
  basin 
  into 
  two 
  great 
  zones, 
  the 
  lower 
  

   division 
  being 
  that 
  of 
  Belemnites 
  clavatus, 
  the 
  upper 
  that 
  of 
  Pecten 
  

   cequivalvis. 
  

  

  Zone 
  of 
  Amaltheus 
  ibex. 
  — 
  The 
  beds 
  containing 
  this 
  Ammonite 
  

   and 
  some 
  8 
  or 
  10 
  other 
  species 
  long 
  ago 
  occupied 
  the 
  attention 
  

   of 
  3)e 
  la 
  Beche 
  and 
  Murchison; 
  they 
  are 
  the 
  Upper 
  Marls 
  (in 
  

   part) 
  of 
  De 
  la 
  Beche, 
  occurring 
  at 
  Golden 
  Cap 
  and 
  Black- 
  Yen, 
  

   at 
  Lyme 
  Regis*. 
  

  

  Sir 
  Roderick 
  Murchison, 
  in 
  1845, 
  with 
  Prof. 
  Buckman 
  (Geol. 
  of 
  

   Cheltenham, 
  2nd 
  ed. 
  p. 
  42) 
  recognized 
  and 
  described 
  these 
  beds, 
  

   which 
  were 
  then 
  exposed 
  at 
  Battle 
  Down, 
  near 
  Cheltenham, 
  Leck- 
  

   hampton, 
  Churchdown, 
  and 
  Dumbleton. 
  The 
  tenacious 
  yellow 
  clays 
  

   and 
  hard 
  ferruginous 
  nodules 
  distributed 
  through 
  the 
  series 
  of 
  beds 
  

   yield 
  numerous 
  Mollusca 
  ; 
  amongst 
  them 
  Amaltheus 
  ibex, 
  JEgoceras 
  

   Valdani, 
  2E. 
  Maugenesti, 
  Lytoceras 
  Jimbriatum, 
  and 
  Phylloceras 
  Los- 
  

   combi 
  are 
  conspicuous 
  and 
  well 
  known. 
  The 
  highly 
  typical 
  Cardinia 
  

   attenuata 
  abounds 
  in 
  the 
  ferruginous 
  nodules, 
  with 
  Area 
  truncata 
  and 
  

   A. 
  elongata, 
  and 
  associated 
  with 
  BhyncJioneTla 
  ficrcillata, 
  It. 
  rimosa, 
  

   and 
  Pecten 
  priscus. 
  I 
  know 
  of 
  no 
  Actinozoa 
  from 
  this 
  zone. 
  

  

  The 
  most 
  exhaustive 
  notice 
  and 
  description 
  of 
  the 
  Ibex-series 
  is 
  

   that 
  prepared 
  by 
  Mr. 
  E. 
  B. 
  Tawney, 
  M.A., 
  in 
  his 
  paper 
  upon 
  the 
  

   " 
  Lias 
  of 
  the 
  neighbourhood 
  of 
  Badstock"f. 
  His 
  memoir 
  is 
  of 
  great 
  

   value 
  as 
  tending 
  to 
  clearly 
  and 
  definitely 
  fix 
  the 
  position 
  of 
  the 
  

   Munger 
  beds 
  near 
  Badstock. 
  

  

  The 
  general 
  persistency 
  of 
  the 
  Ibex-clays 
  and 
  limestones 
  above 
  

   those 
  containing 
  JEgoceras 
  Jamesoni 
  is 
  thus 
  maintained, 
  although 
  the 
  

   latter 
  is 
  found 
  associated 
  by 
  Mr. 
  Tawney 
  at 
  Munger 
  with 
  2E. 
  Mau- 
  

   genesti, 
  jE. 
  Valdani, 
  Lytoceras 
  fimbriatum, 
  &c. 
  This 
  gives 
  to 
  JE. 
  

   Jamesoni 
  a 
  long 
  range 
  in 
  time. 
  

  

  * 
  De 
  la 
  Beche, 
  "Lias 
  of 
  Lyme 
  Eegis,' 
  ; 
  G-eol. 
  Trans. 
  2nd 
  ser. 
  vol. 
  ii. 
  p. 
  22 
  r 
  

   1823. 
  

  

  t 
  Proceedings 
  Bristol 
  Nat, 
  Soc. 
  vol. 
  i. 
  p. 
  178 
  (1875). 
  

  

  vol. 
  xxxviii. 
  m 
  

  

  