﻿ANNIVERSARY 
  ADDRESS 
  OE 
  THE 
  PRESIDENT. 
  

  

  Table 
  XXII. 
  

  

  157 
  

  

  Area 
  

  

  Astarte 
  

  

  Cardinia 
  ... 
  

   Cardium 
  ... 
  

   Cucullsea 
  ... 
  

   Cypricardia 
  

   Goniomya 
  

   Gi*esslya 
  . 
  . 
  . 
  

  

  Leda 
  

  

  Modiola 
  

  

  Myacites 
  . 
  . 
  . 
  

  

  Mytilus 
  

  

  Nucula 
  

  

  Pholadomya 
  

   Pleuroinya 
  

   Tancredia 
  ... 
  

  

  o.S 
  

  

  CO 
  

  

  

  § 
  

  

  

  

  

  

  

  ! 
  s 
  s 
  i 
  

  

  H 
  

  

  CD 
  

  

  3 
  

  

  £ 
  a? 
  

  

  •Sol 
  

  

  s 
  1 
  s 
  

  

  CD 
  

  

  'Xj 
  go 
  

  

  as 
  

  

  § 
  8 
  

  

  PhP, 
  

  

  2 
  ^rS 
  

  

  O 
  

   h3 
  

  

  a^ 
  

  

  t3 
  

  

  

  11 
  

  

  6 
  

  

  2 
  

  

  3 
  

  

  11 
  

  

  19 
  

  

  5 
  

  

  6 
  

  

  9 
  

  

  20 
  

  

  27 
  

  

  22 
  

  

  11 
  

  

  

  33 
  

  

  8 
  

  

  4 
  

  

  2 
  

  

  2 
  

  

  8 
  

  

  11 
  

  

  6 
  

  

  2 
  

  

  3 
  

  

  11 
  

  

  13 
  

  

  6 
  

  

  4 
  

  

  3 
  

  

  13 
  

  

  6 
  

  

  3 
  

  

  3 
  

  

  3 
  

  

  9 
  

  

  11 
  

  

  3 
  

  

  5 
  

  

  3 
  

  

  11 
  

  

  21 
  

  

  9 
  

  

  10 
  

  

  3 
  

  

  22 
  

  

  15 
  

  

  8 
  

  

  6 
  

  

  3 
  

  

  17 
  

  

  6 
  

  

  2 
  

  

  2 
  

  

  4 
  

  

  8 
  

  

  9 
  

  

  4 
  

  

  4 
  

  

  1 
  

  

  9 
  

  

  9 
  

  

  2 
  

  

  4 
  

  

  4 
  

  

  10 
  

  

  16 
  

  

  8 
  

  

  6 
  

  

  4 
  

  

  18 
  

  

  16 
  

  

  5 
  

  

  8 
  

  

  5 
  

  

  18 
  

  

  11 
  

  

  5 
  

  

  3 
  

  

  3 
  

  

  11 
  

  

  209 
  

  

  98 
  

  

  78 
  

  

  53 
  

  

  229 
  

  

  The 
  value 
  of 
  the 
  same 
  16 
  genera 
  I 
  now 
  give 
  (Table 
  XXIII.) 
  for 
  the 
  

   whole 
  of 
  the 
  Jurassic 
  rocks 
  to 
  show 
  increase 
  or 
  decrease 
  in 
  time, 
  

   from 
  the 
  Lias 
  upwards 
  ; 
  this 
  is, 
  of 
  course, 
  only 
  so 
  far 
  as 
  we 
  know 
  ; 
  

   but 
  it 
  helps 
  us 
  to 
  understand 
  the 
  distribution, 
  both 
  in 
  space 
  and 
  

   time, 
  when 
  the 
  faunas 
  of 
  sections 
  are 
  under 
  consideration 
  : 
  — 
  

  

  Table 
  XXIII. 
  

  

  i 
  

  

  CD 
  

  

  -a 
  

   .£ 
  

  

  GO 
  

  

  "S 
  

   © 
  

  

  P-< 
  

  

  

  ^ 
  

  

  

  Loa 
  

  

  T 
  ER. 
  

  

  

  

  Middle. 
  

  

  

  Upper. 
  

  

  

  Chief 
  genera. 
  

  

  .So 
  

  

  £ 
  *■ 
  

  

  * 
  2 
  

   'S 
  

  

  E- 
  CO 
  

  

  f-> 
  E5 
  

  

  2 
  

  

  

  

  

  

  

  

  

  

  

  

   >- 
  

   

  

  ■8 
  . 
  

  

  co 
  co 
  

  

  4) 
  cj 
  

  

  I 
  3 
  

   1 
  

  

  CD 
  

  

  Ph. 
  

  

  

   'o 
  

  

  O 
  

  

  .2 
  

  

  4 
  

  

  CI 
  

   33 
  

  

  O 
  

  

  O 
  

  

  O 
  

   O 
  

  

  H^> 
  

   S3 
  

   O 
  

  

  

  

  1 
  

  

  a 
  

  

  CO 
  

  

  u 
  

  

  r=J 
  

  

  c$ 
  

  

  -a 
  

  

  ■a 
  

  

  

  

  1 
  

  

  5 
  

  

  E3 
  

   • 
  2 
  rn 
  

  

  r=l 
  r« 
  

  

  e 
  

  

  

  

  rSP 
  

  

  no 
  

  

  T3 
  

  

  1 
  

  

  w 
  

  

  

  & 
  

  

  a 
  

  

  1— 
  1 
  

  

  E3 
  

  

  O 
  

  

  a 
  

  

  

   Q 
  

  

  M 
  

  

  O 
  

  

  pd 
  

  

  3 
  

  

  O 
  

  

  Ph 
  

  

  

  11 
  

  

  19 
  

  

  27 
  

  

  

  45 
  

  

  77 
  

   29 
  

  

  12 
  

  

  24 
  

  

  1 
  

  

  "i 
  

  

  10 
  

  

  21 
  

  

  1 
  

  

  1 
  

  

  6 
  

  

  1 
  

  

  7 
  

  

  *4 
  

  

  2 
  

   4 
  

  

  5 
  

   8 
  

  

  3 
  

  

  7 
  

  

  2 
  

  

  34 
  

  

  84 
  

  

  2 
  

  

  Astarte 
  

  

  Cardinia 
  

  

  8 
  

  

  Cardium 
  

  

  35 
  

  

  6 
  

  

  i 
  

  

  10 
  

  

  i 
  

  

  7 
  

  

  6 
  

  

  3 
  

  

  3 
  

  

  2 
  

  

  4 
  

  

  43 
  

  

  11 
  

  

  Cucullsea 
  

  

  37 
  

  

  16 
  

  

  4 
  

  

  4 
  

  

  

  2 
  

  

  4 
  

  

  4 
  

  

  4 
  

  

  

  1 
  

  

  39 
  

  

  13 
  

  

  Cypricardia 
  

  

  26 
  

  

  5 
  

  

  2 
  

  

  4 
  

  

  2' 
  

  

  2 
  

  

  

  

  2 
  

  

  i 
  

  

  

  18 
  

  

  6 
  

  

  Goniomya 
  

  

  15 
  

  

  3 
  

  

  2 
  

  

  5 
  

  

  

  2 
  

  

  i 
  

  

  

  3 
  

  

  4 
  

  

  

  20 
  

  

  11 
  

  

  Gresslya 
  

  

  19 
  

  

  3 
  

  

  2 
  

  

  3 
  

  

  

  1 
  

  

  1 
  

  

  

  1 
  

  

  

  

  11 
  

  

  21 
  

  

  Leda 
  

  

  31 
  

  

  2 
  

  

  

  2 
  

  

  i 
  

  

  5 
  

  

  

  i 
  

  

  

  i 
  

  

  1 
  

  

  13 
  

  

  15 
  

   6 
  

  

  Modiola 
  

  

  44 
  

   33 
  

  

  9 
  

   11 
  

  

  6 
  

  

  5 
  

  

  14 
  

  

  7 
  

  

  2 
  

   1 
  

  

  7 
  

   8 
  

  

  6 
  

  

  1 
  

   1 
  

  

  7 
  

   4 
  

  

  3 
  

   1 
  

  

  2 
  

  

  3 
  

  

  56 
  

   47 
  

  

  Myacites 
  

  

  9 
  

  

  Mytilus 
  

  

  25 
  

  

  9 
  

  

  

  2 
  

  

  

  2 
  

  

  

  1 
  

  

  1 
  

  

  1 
  

  

  3 
  

  

  19 
  

  

  9 
  

  

  16 
  

  

  Nucula 
  

  

  19 
  

  

  49 
  

  

  3 
  

   11 
  

  

  i 
  

  

  8 
  

  

  2 
  

   12 
  

  

  1 
  

  

  1 
  

   10 
  

  

  1 
  

  

  7 
  

  

  2 
  

  

  4 
  

  

  6 
  

  

  1 
  

   3 
  

  

  2 
  

   3 
  

  

  13 
  

  

  65 
  

  

  Pholadomya 
  

  

  16 
  

  

  Pleuroinya 
  

  

  23 
  

  

  3 
  

  

  

  

  

  

  

  1 
  

  

  1 
  

  

  1 
  

  

  1 
  

  

  7 
  

  

  11 
  

  

  Tancredia 
  

  

  26 
  

  

  10 
  

  

  

  9 
  

  

  i 
  

  

  

  i 
  

  

  1 
  

  

  

  

  

  22 
  

  

  209 
  

  

  533 
  

  

  1 
  

  

  128 
  

  

  32 
  

  

  106 
  

  

  16 
  

  

  55 
  

  

  36 
  

  

  25 
  

  

  45 
  

  

  28 
  

  

  22 
  

  

  493 
  

  

  