﻿ANNIVERSARY 
  ADDRESS 
  OE 
  THE 
  PRESIDENT. 
  1 
  87 
  

  

  two 
  — 
  the 
  Forest 
  Marble 
  and 
  Cornbrash. 
  The 
  following* 
  small 
  Table 
  

   will 
  illustrate 
  their 
  distribution 
  : 
  — 
  

  

  Lower 
  Lias 
  21 
  species. 
  

  

  Middle 
  Lias. 
  27 
  „ 
  

  

  Upper 
  Lias 
  34 
  „ 
  

  

  Inferior 
  Oolite 
  16 
  „ 
  

  

  Fuller's 
  Earth 
  3 
  „ 
  

  

  Great 
  Oolite 
  3 
  ,, 
  

  

  Forest 
  Marble. 
  

  

  Cornbrash. 
  

  

  Kellaways 
  Rock 
  .... 
  3 
  „ 
  

  

  Oxford 
  Clay 
  13 
  „ 
  

  

  Corallian 
  beds 
  4 
  „ 
  

  

  Kimmeridge 
  Clay 
  ... 
  8 
  „ 
  

  

  132 
  occurrences. 
  

  

  The 
  115 
  species 
  make 
  132 
  appearances 
  through 
  the 
  whole 
  series 
  of 
  

   Jurassic 
  strata. 
  

  

  Teuthidce. 
  The 
  dibranchiate 
  Decapoda 
  of 
  the 
  Jurassic 
  rocks 
  do 
  not 
  

   number 
  more 
  than 
  six 
  genera, 
  illustrating 
  three 
  families, 
  the 
  Loligidse, 
  

   Teuthidse, 
  and 
  Belemnitidsc. 
  The 
  two 
  first-named 
  families 
  are 
  not 
  

   represented 
  in 
  the 
  Inferior 
  Oolite 
  ; 
  Acantlioteuthis 
  antiquus 
  is 
  con- 
  

   fined 
  to 
  the 
  Oxford 
  Clay 
  : 
  Coccoteuthis 
  latipinnis 
  is 
  essentially 
  

   Kimmeridge-Clay 
  ; 
  Geotent7iis, 
  Beloteuthis, 
  and 
  XiphoteutJiis 
  are 
  Lias 
  

   genera, 
  numbering 
  four 
  species 
  between 
  them. 
  

  

  Pisces. 
  — 
  Hybodus 
  crassus, 
  Strophodus 
  magnus, 
  S. 
  subreticidatus, 
  

   and 
  S. 
  tenuis 
  (or 
  two 
  genera 
  and 
  four 
  species) 
  are 
  all 
  that 
  we 
  actually 
  

   know 
  of 
  the 
  Inferior-Oolite 
  fish. 
  No 
  Pycnodont 
  or 
  Lepidotoid 
  form, 
  

   as 
  we 
  should 
  almost 
  expect, 
  have 
  ever 
  been 
  obtained 
  from 
  the 
  

   Inferior 
  Oolite. 
  Next 
  to 
  the 
  Lower 
  Lias 
  with 
  its 
  40 
  genera 
  and 
  

   106 
  species, 
  comes 
  the 
  Great 
  Oolite, 
  the 
  fish-fauna 
  of 
  which 
  numbers 
  

   20 
  genera 
  and 
  58 
  species. 
  

  

  Reptilia 
  none, 
  although 
  30 
  genera 
  and 
  132 
  species 
  range 
  through 
  

   the 
  whole 
  Jurassic 
  formation. 
  Three 
  horizons 
  appear 
  to 
  have 
  none, 
  

   viz. 
  the 
  Inferior 
  Oolite, 
  Fuller's 
  Earth, 
  and 
  Kellaways 
  Rock. 
  13 
  

   genera 
  and 
  27 
  species 
  occur 
  in 
  the 
  Great 
  Oolite, 
  3 
  genera 
  and 
  

   3 
  species 
  in 
  the 
  Forest 
  Marble, 
  and 
  one 
  species 
  in 
  the 
  Cornbrash. 
  

   The 
  Oxford 
  Clay 
  contains 
  13 
  species, 
  the 
  Corallian 
  rocks 
  3, 
  tho 
  

   Kimmeridge 
  Clay 
  43, 
  and 
  the 
  Portlandian 
  6 
  species. 
  I 
  state 
  these 
  

   now, 
  so 
  as 
  to 
  show 
  the 
  census 
  of 
  the 
  Reptilia 
  through 
  the 
  Jurassic 
  

   rocks 
  ; 
  individually 
  they 
  will 
  be 
  noticed 
  hereafter. 
  

  

  Mammalia. 
  — 
  None 
  known. 
  

  

  