﻿ANNIVEESAEY 
  ADDEESS 
  OF 
  THE 
  PRESIDENT. 
  107 
  

  

  we 
  also 
  find 
  Am. 
  biplex, 
  Am. 
  Thurmanni, 
  Astarte 
  lineata, 
  and 
  Area 
  

   rhomboidalis. 
  In 
  Wiltshire, 
  Oxfordshire, 
  and 
  Buckinghamshire 
  

   the 
  Upper 
  Kimmeridge 
  appears 
  to 
  ho 
  very 
  thin. 
  At 
  Swindon 
  and 
  

   Hartwell 
  there 
  is 
  little 
  room 
  for 
  it 
  between 
  the 
  Lower 
  Kimmeridge 
  

   and 
  the 
  Portland 
  Sand. 
  The 
  great 
  pit 
  at 
  Ely 
  shows 
  but 
  little 
  

   Upper 
  Kimmeridge 
  in 
  vertical 
  thickness 
  ; 
  and, 
  as 
  in 
  Lincolnshire, 
  

   the 
  chief 
  fossils 
  are 
  Distinct 
  latissima, 
  Cardium 
  striatidum, 
  and 
  

   Lucina 
  minuscula. 
  Am. 
  serratus 
  and 
  the 
  abundance 
  of 
  Eooogyra 
  

   virgula 
  mark 
  the 
  commencement 
  of 
  the 
  Lower 
  Kimmeridge, 
  or 
  the 
  

   passage 
  from 
  the 
  Upper 
  to 
  the 
  Lower. 
  

  

  Mr. 
  Blake 
  has 
  prepared 
  a 
  sketch 
  map 
  showing 
  the 
  geographical 
  

   position 
  of 
  various 
  pits 
  in 
  the 
  Kimmeridge 
  Clay 
  of 
  Lincolnshire, 
  

   ranging 
  from 
  Eerriby 
  in 
  the 
  north, 
  to 
  Horncastle 
  and 
  Spilsby 
  in 
  the 
  

   south. 
  Numerous 
  fossils 
  occur, 
  some 
  15 
  species 
  having 
  been 
  col- 
  

   lected 
  by 
  Mr. 
  Blake. 
  Prof. 
  Judd 
  records 
  the 
  Kimmeridge 
  Clay 
  at 
  

   Eiley 
  Bay, 
  where 
  it 
  is 
  exposed 
  at 
  certain 
  times 
  below 
  the 
  ordinary 
  

   low-water 
  mark. 
  Mr. 
  Leckenby 
  also 
  has 
  collected 
  Ammonites 
  from 
  

   Eiley 
  Bay 
  ; 
  but 
  the 
  fauna, 
  small 
  as 
  it 
  is, 
  possesses 
  quite 
  a 
  f 
  acies 
  of 
  

   its 
  own. 
  Mr. 
  Judd 
  records 
  the 
  following 
  species 
  from 
  the 
  Upper 
  

   Kimmeridge 
  of 
  Eiley 
  Bay 
  — 
  Ammonites 
  biplex, 
  several 
  species 
  of 
  the 
  

   group 
  Planulati, 
  Ostrea, 
  sp., 
  Inoceramus, 
  sp., 
  Cardium, 
  sp., 
  many 
  

   bivalves, 
  Distinct 
  latissima, 
  Lingula 
  ovedis, 
  Ichthyosaurian 
  vertebrae 
  

   (Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xxiv. 
  p. 
  239). 
  The 
  Upper 
  Kimmeridge 
  

   fauna 
  numbers 
  21 
  species 
  ; 
  14 
  are 
  peculiar, 
  and 
  7 
  are 
  common 
  to 
  

   lower 
  and 
  higher 
  beds. 
  

  

  The 
  Lowee 
  Kimmeeidge. 
  — 
  Mr. 
  Blake 
  does 
  not 
  admit 
  the 
  Middle 
  

   Kimmeridge 
  division 
  of 
  Waagen 
  for 
  England, 
  although 
  granting 
  that 
  

   the 
  deposition 
  of 
  the 
  beds 
  may 
  have 
  been 
  continuous 
  and 
  some 
  of 
  

   them 
  contemporaneous 
  with 
  the 
  Middle 
  period. 
  The 
  special 
  fauna 
  

   of 
  the 
  Middle 
  series 
  abounds 
  in 
  Gasteropoda 
  of 
  the 
  genera 
  Pterocera, 
  

   Nerincea, 
  Natica, 
  and 
  Cliemnitzia, 
  together 
  with 
  many 
  varieties 
  of 
  

   Panopcea 
  and 
  Pholadomya. 
  " 
  Only 
  the 
  discovery 
  of 
  such 
  a 
  fauna," 
  

   says 
  Mr. 
  Blake, 
  " 
  would 
  justify 
  the 
  recognition 
  of 
  Middle 
  Kimmeridge 
  

   beds" 
  (loc. 
  cit. 
  pp. 
  204, 
  205). 
  Prof. 
  Judd, 
  however, 
  following 
  Waagen, 
  

   has 
  enumerated 
  about 
  24 
  species 
  as 
  coming 
  from 
  the 
  Middle 
  Kim- 
  

   meridge 
  of 
  Eiley 
  Bay, 
  viz. 
  2 
  Belemnites, 
  7 
  Ammonites, 
  A. 
  bvplex, 
  

   A. 
  mutabilis, 
  A. 
  triplicatus, 
  A. 
  Marantianus, 
  A. 
  yo, 
  A. 
  Berry 
  eri, 
  and 
  

   A. 
  sp., 
  Eccogyra 
  virgida, 
  E. 
  nana, 
  and 
  9 
  genera 
  and. 
  species 
  of 
  

   Bivalves, 
  RJiynclionella, 
  &c. 
  Erom 
  the 
  Lower 
  Kimmeridge 
  of 
  

   Speeton 
  Prof. 
  Judd 
  obtained 
  only 
  Am. 
  alternans 
  and 
  Rliynchonella 
  

   inconstans 
  (Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xxiv. 
  p. 
  240). 
  

  

  The 
  Lower 
  Kimmeridge 
  is 
  best 
  studied 
  in 
  Lincolnshire, 
  where 
  it 
  

   agrees 
  with 
  the 
  Dorsetshire 
  type. 
  At 
  Horncastle 
  17 
  species 
  have 
  

   been 
  collected, 
  all 
  of 
  which 
  elsewhere 
  in 
  Lincolnshire 
  are 
  associated 
  

   with 
  Am. 
  serratus. 
  The 
  peculiar 
  fossils 
  here 
  are 
  Rostellaria 
  mo- 
  

   sensis, 
  Cerithium 
  crebrum, 
  Astarte 
  supracorallina, 
  Avicida 
  cedilig- 
  

   nensis, 
  Pecten 
  Grenieri, 
  Corbida 
  Deshayesia, 
  &c. 
  East 
  of 
  Brigg 
  and 
  

   the 
  Wrawby 
  cutting 
  I 
  obtained 
  many 
  of 
  the 
  species 
  named 
  by 
  

   Mr. 
  Blake. 
  The 
  Market-Easen 
  pits 
  yield 
  a 
  large 
  fauna 
  ; 
  no 
  less 
  than 
  

   46 
  species 
  have 
  been 
  obtained 
  from 
  them, 
  representing 
  31 
  genera. 
  

  

  