﻿ANNIVERSARY 
  ADDRESS 
  OF 
  THE 
  PRESIDENT. 
  liii 
  

  

  I 
  shall 
  now 
  briefly 
  examine 
  some 
  of 
  the 
  details. 
  

  

  Inferior 
  Oolite. 
  — 
  The 
  Amorphozoa 
  known 
  are 
  few 
  and 
  unimportant. 
  

   One 
  is 
  known 
  in 
  and 
  confined 
  to 
  the 
  Inferior 
  Oolite 
  ; 
  seven 
  have 
  been 
  

   found 
  in 
  the 
  Great 
  Oolite, 
  one 
  of 
  which, 
  unknown 
  in 
  the 
  intermediate 
  

   formations, 
  reappears 
  in 
  the 
  Coral 
  Rag. 
  

  

  Of 
  Zoophtta, 
  32 
  are 
  known 
  in 
  the 
  Inferior 
  Oolite, 
  7 
  of 
  which 
  

   •(about 
  22 
  per 
  cent.) 
  pass 
  into 
  the 
  Great 
  Oolite, 
  none 
  of 
  them 
  being 
  

   known 
  in 
  the 
  Fuller's 
  Earth. 
  

  

  Of 
  Echinodermata 
  51 
  species 
  are 
  known, 
  32 
  of 
  which 
  only 
  are 
  

   peculiar, 
  and 
  19 
  (37 
  per 
  cent.) 
  pass 
  upwards, 
  one 
  of 
  these 
  only 
  ap- 
  

   pearing 
  in 
  the 
  Fuller's 
  Earth 
  and 
  18 
  in 
  the 
  Great 
  Oolite. 
  

  

  The 
  Aetictjlata 
  are 
  unimportant 
  all 
  through 
  the 
  Oolites, 
  and 
  so 
  

   are 
  the 
  Poltzoa 
  ; 
  and, 
  therefore, 
  I 
  shall 
  refer 
  for 
  details 
  respecting 
  

   them 
  to 
  the 
  Table. 
  

  

  But 
  the 
  Brachtopoda 
  are 
  of 
  more 
  value 
  in 
  this 
  argument 
  ; 
  for 
  of 
  

   40 
  species, 
  all 
  new, 
  which 
  appear 
  in 
  the 
  Inferior 
  Oolite, 
  only 
  one 
  

   passes 
  upwards. 
  

  

  Of 
  the 
  Lamellibranchiata 
  Monomyaria 
  58 
  are 
  known, 
  4 
  of 
  which 
  

   occur 
  in 
  the 
  Upper 
  Lias, 
  and 
  27 
  (47 
  per 
  cent.) 
  pass 
  upwards, 
  leaving 
  

   31 
  species 
  peculiar 
  to 
  the 
  formation 
  ; 
  while 
  of 
  Dimyaria 
  153 
  species 
  

   are 
  known, 
  106 
  of 
  which 
  are 
  peculiar. 
  Of 
  the 
  remaining 
  47 
  species 
  

   9 
  are 
  found 
  in 
  the 
  Upper 
  Lias, 
  and 
  50 
  pass 
  upwards 
  (32 
  per 
  cent.), 
  

   48 
  of 
  which 
  are 
  known 
  in 
  the 
  Great 
  Oolite. 
  If 
  we 
  take 
  the 
  

   Lamellibranchiata 
  as 
  a 
  whole, 
  there 
  are 
  in 
  the 
  Inferior 
  Oolite 
  211 
  

   species, 
  75 
  of 
  which 
  (36| 
  per 
  cent.) 
  pass 
  upwards. 
  

  

  It 
  is 
  worthy 
  of 
  remark 
  that 
  in 
  the 
  Cretaceous 
  series 
  these 
  propor- 
  

   tions 
  are 
  in 
  some 
  degree 
  reversed, 
  many 
  of 
  the 
  Brachiopoda 
  having 
  

   a 
  long 
  range 
  through 
  various 
  formations, 
  while 
  in 
  one 
  case, 
  that 
  of 
  

   the 
  Upper 
  Greensand, 
  all 
  the 
  species 
  of 
  Dimyaria 
  (save 
  one) 
  are 
  

   restricted 
  to 
  that 
  formation. 
  

  

  Of 
  Gasteropoda 
  there 
  are 
  80 
  species, 
  all 
  new 
  forms, 
  29 
  of 
  which 
  

   (about 
  36 
  per 
  cent.) 
  pass 
  upwards. 
  

  

  Of 
  Cephalopoda 
  there 
  are 
  39 
  species, 
  all 
  new, 
  and 
  only 
  one 
  of 
  these 
  

   passes 
  upwards 
  into 
  the 
  Great 
  Oolite. 
  

  

  Five 
  species 
  of 
  Fish 
  are 
  known, 
  two 
  of 
  which 
  also 
  pass 
  into 
  the 
  

   Great 
  Oolite. 
  

  

  The 
  general 
  result 
  is, 
  that, 
  of 
  the 
  more 
  important 
  classes 
  of 
  life, 
  the 
  

   Brachiopoda 
  and 
  Cephalopoda 
  are 
  most 
  restricted, 
  only 
  one 
  species 
  of 
  

   each, 
  out 
  of 
  40 
  and 
  39 
  respectively, 
  passing 
  upwards 
  ; 
  while 
  of 
  the 
  

   Echinodermata, 
  Lamellibranchiata, 
  and 
  Gasteropoda, 
  37, 
  47, 
  32, 
  and 
  

   36 
  per 
  cent, 
  pass 
  upwards, 
  making 
  on 
  an 
  average 
  36^- 
  per 
  cent, 
  of 
  the 
  

   whole 
  ; 
  while, 
  if 
  we 
  mass 
  all 
  the 
  forms 
  of 
  marine 
  life, 
  we 
  find 
  in 
  the 
  

   Inferior 
  Oolite 
  471 
  species, 
  only 
  12 
  of 
  which 
  come 
  up 
  from 
  the 
  

   Upper 
  Lias, 
  and 
  138 
  pass 
  upwards, 
  or 
  more 
  than 
  29 
  per 
  cent. 
  

  

  Fuller's 
  Earth. 
  — 
  Yery 
  few 
  Inferior 
  Oolite 
  species 
  are 
  found 
  in 
  the 
  

   Fuller's 
  Earth. 
  In 
  Amorphozoa, 
  Zoophyta, 
  Articulata, 
  Polyzoa, 
  Gas- 
  

   teropoda, 
  Cephalopoda, 
  Fish, 
  and 
  Reptiles 
  our 
  lists 
  mark 
  it 
  as 
  quite 
  

   barren 
  in 
  "known 
  species 
  ; 
  and 
  of 
  Echinodermata, 
  Brachiopoda, 
  and 
  

   Lamellibranchiata 
  only 
  22 
  species 
  are 
  known. 
  It 
  is, 
  therefore, 
  a 
  

   sterile 
  formation 
  as 
  regards 
  numbers 
  of 
  species, 
  though 
  individuals 
  

  

  