﻿ANNIVERSARY 
  ADDRESS 
  OP 
  THE 
  PRESIDENT. 
  

  

  Table 
  XT. 
  

  

  99 
  

  

  

  Inferior 
  Oolite 
  of 
  the 
  

   Midland 
  district. 
  

  

  Compared 
  with 
  

  

  

  3 
  

  

  CO 
  . 
  

  

  £■§ 
  

  

  o 
  

   O 
  

  

  o 
  

  

  1*1, 
  

  

  o 
  

  

  Inferior 
  Oolite 
  of 
  

  

  the 
  South 
  of 
  

  

  England. 
  

  

  o 
  

  

  0) 
  

  

  ^H 
  CD 
  

  

  S3 
  

  

  'S 
  o 
  

  

  q 
  

  

  i— 
  i 
  

  

  Great 
  Oolite 
  of 
  

  

  the 
  West 
  of 
  

  

  England. 
  

  

  

  6 
  

  

  21 
  

  

  19 
  

  

  8 
  

  

  1 
  

  

  26 
  

  

  55 
  

   101 
  

  

  56 
  

   4 
  

   4 
  

   2 
  

   2 
  

   1 
  

  

  1 
  

  

  "i 
  

  

  "i 
  

  

  31 
  

  

  32 
  

  

  5 
  

  

  1 
  

   7 
  

   11 
  

   3 
  

   1 
  

  

  24 
  

  

  55 
  

  

  90 
  

  

  29 
  

  

  8 
  

  

  8 
  

  

  4 
  

  

  2 
  

  

  17 
  

  

  17 
  

   6 
  

  

  1 
  

  

  18 
  

  

  50 
  

  

  63 
  

  

  33 
  

  

  6 
  

  

  3 
  

  

  2 
  

  

  2 
  

   1 
  

   5 
  

   5 
  

  

  1 
  

  

  1 
  

  

  18 
  

  

  42 
  

  

  15 
  

  

  1 
  

  

  2 
  

  

  2 
  

   .9 
  

  

  7 
  

  

  3 
  

  

  30 
  

   54 
  

  

  27 
  

  

  1 
  

  

  Coelenterata 
  ... 
  

   Echinoidea 
  

  

  Crustacea 
  

  

  Bryozoa 
  

  

  Bracliiopoda 
  ... 
  

   , 
  r 
  Monomyaria 
  ... 
  

   [Dimyaria 
  

  

  Gasteropoda 
  . 
  . 
  . 
  

  

  ["Ammonites 
  

  

  \ 
  Belemnites 
  

  

  [Nautili 
  

  

  Pisces 
  

  

  Heptilia 
  

  

  

  306 
  

  

  71 
  

  

  243 
  

  

  216 
  

  

  93 
  

  

  133 
  

  

  Thus, 
  out 
  of 
  the 
  306 
  species 
  occurring 
  in 
  the 
  Lincolnshire 
  Lime- 
  

   stone, 
  71 
  are 
  in 
  the 
  Collyweston 
  Slate 
  below, 
  243 
  of 
  the 
  306 
  occur 
  

   in 
  the 
  Northampton 
  Sand, 
  216 
  species 
  are 
  common 
  to 
  the 
  Oolites 
  

   of 
  the 
  South 
  of 
  England, 
  whilst 
  only 
  93 
  can 
  be 
  identified 
  in 
  the 
  

   Yorkshire 
  beds, 
  but 
  133 
  of 
  the 
  Lincolnshire 
  Inferior 
  Oolite 
  species 
  

   pass 
  upwards 
  and 
  are 
  found 
  in 
  the 
  Great 
  Oolite 
  of 
  the 
  West 
  of 
  

   England. 
  I 
  am, 
  however, 
  disposed 
  to 
  regard 
  this 
  last 
  number 
  as 
  

   too 
  high 
  ; 
  the 
  condition 
  of 
  the 
  shells 
  is 
  such, 
  in 
  some 
  localities 
  and 
  

   beds, 
  as 
  to 
  render 
  them 
  difficult 
  of 
  strict 
  identification 
  and 
  com- 
  

   parison. 
  

  

  The 
  rocks 
  of 
  the 
  two 
  facies 
  of 
  the 
  Lincolnshire 
  Limestone 
  are 
  not 
  

   constant 
  in 
  their 
  relative 
  positions 
  ; 
  and 
  this 
  change 
  of 
  conditions 
  

   is 
  doubtless 
  due 
  to 
  difference 
  of 
  level 
  of 
  the 
  sea-bed 
  at 
  the 
  time 
  of 
  

   deposition. 
  There 
  is 
  no 
  doubt 
  that 
  the 
  great 
  mass 
  of 
  the 
  Lincoln- 
  

   shire 
  Oolite 
  was 
  accumulated 
  under 
  moderately 
  deep-water 
  conditions 
  ; 
  

   but 
  both 
  estuarine 
  and 
  littoral 
  conditions 
  prevail 
  at 
  its 
  base 
  and 
  top. 
  

   Prof. 
  Judd 
  believes* 
  that 
  " 
  during 
  a 
  portion 
  of 
  the 
  Jurassic 
  period, 
  

   well 
  marked 
  within 
  the 
  ancient 
  life-province 
  now 
  constituting 
  Britain, 
  

   Northern 
  France, 
  and 
  Western 
  Germany 
  by 
  the 
  abundance 
  of 
  certain 
  

   characteristic 
  species 
  (those 
  of 
  the 
  zone 
  of 
  Ammonites 
  Sowerbyi), 
  local 
  

   depression 
  took 
  place 
  within 
  an 
  area 
  having 
  a 
  diameter 
  of 
  something 
  

   like 
  90 
  miles, 
  the 
  amount 
  of 
  depression 
  being 
  greatest 
  within 
  its 
  

  

  * 
  Loc. 
  cit. 
  p. 
  143. 
  

  

  12 
  

  

  