﻿ANNIVERSARY 
  ADDRESS 
  OF 
  THE 
  PRESIDENT. 
  Ill 
  

  

  " 
  where 
  sponges 
  luxuriated," 
  and 
  were 
  accompanied 
  by 
  " 
  the 
  great 
  

   Lima 
  pectiniformis." 
  The 
  authors 
  found 
  in 
  these 
  beds 
  no 
  less 
  than 
  

   34 
  species, 
  23 
  of 
  which 
  were 
  Lamellibranchs, 
  with 
  the 
  2 
  charac- 
  

   teristic 
  Brachiopoda, 
  Discina 
  Humpliriesiana 
  and 
  Lingv.la 
  ovalis, 
  

   accompanied 
  by 
  Cidaris 
  florigemna, 
  C. 
  Smithii, 
  and 
  Echinobrissus 
  

   scutatus. 
  Only 
  2 
  species 
  of 
  Gasteropoda 
  occurred 
  — 
  Pleurotomaria 
  

   Munsteri 
  and 
  Littorina 
  pulcherrima. 
  

  

  The 
  great 
  deposit 
  of 
  the 
  Abbotsbury 
  Ironstone 
  (hydrated 
  ferric 
  

   oxide), 
  containing 
  especially 
  Bhynchonella 
  corallina 
  and 
  Wald- 
  

   heimia 
  lampas, 
  yielded 
  to 
  the 
  authors 
  30 
  species, 
  the 
  5 
  Brachiopoda 
  

   indicating 
  Kimmeridgian 
  affinities, 
  or 
  a 
  close 
  approach 
  to 
  that 
  

   horizon. 
  Messrs. 
  Blake 
  and 
  Hudleston 
  truly 
  say 
  that 
  there 
  is 
  

   nothing 
  specially 
  "coralline" 
  in 
  the 
  rocks 
  of 
  the 
  Weymouth 
  area 
  as 
  

   connected 
  with 
  corals 
  ; 
  and 
  the 
  term 
  ' 
  Coral 
  Rag, 
  ? 
  which 
  is 
  an 
  

   essentially 
  lithological 
  name, 
  is 
  here 
  especially 
  inappropriate. 
  Only 
  

   in 
  one 
  limited 
  area 
  does 
  such 
  a 
  rock 
  occur 
  in 
  the 
  whole 
  district. 
  

  

  The 
  authors 
  next 
  discuss 
  the 
  Corallian 
  rocks 
  of 
  the 
  North-Dorset 
  

   area. 
  The 
  Great 
  Sturminster 
  railway-section 
  afforded 
  the 
  key 
  to 
  

   the 
  whole 
  district*. 
  The 
  sections 
  at 
  Gillingham, 
  Cucklington, 
  

   Todbere, 
  and 
  Langham 
  all 
  show 
  how 
  little 
  calcareous 
  grit 
  occurs 
  

   among 
  the 
  more 
  argillaceous 
  series 
  of 
  this 
  region 
  : 
  and 
  the 
  absence 
  

   of 
  Cidaris 
  jiorigemma 
  is 
  significant; 
  it 
  has 
  never 
  occurred 
  in 
  the 
  

   rubbly 
  limestones 
  of 
  the 
  Sturminster 
  section. 
  About 
  40 
  species 
  

   have 
  been 
  determined 
  from 
  the 
  sections 
  above 
  named. 
  

  

  Next 
  in 
  importance 
  is 
  the 
  long 
  and 
  narrow 
  exposure 
  in 
  North 
  

   Wiltshire, 
  Berkshire, 
  and 
  Oxfordshire 
  ; 
  the 
  rocks 
  occur 
  in 
  many 
  

   small 
  areas, 
  and 
  have 
  distinctive 
  characters. 
  

  

  The 
  Westbury 
  Corallian 
  beds 
  consist 
  chiefly 
  of 
  the 
  iron-ore 
  and 
  

   its 
  associated 
  fossils, 
  which 
  are 
  few. 
  11 
  species 
  are 
  enumerated 
  in 
  

   the 
  authors' 
  paper, 
  most 
  of 
  which 
  I 
  have 
  also 
  obtained 
  at 
  the 
  

   extensive 
  excavations. 
  The 
  Steeplc-Ashton 
  beds 
  may 
  be 
  on 
  the 
  

   upper 
  horizon 
  of 
  the 
  Oxfordian 
  group 
  ; 
  18 
  species 
  are 
  named, 
  14 
  of 
  

   which 
  are 
  Lamellibranchiata. 
  

  

  Prom 
  the 
  well-known 
  Calne 
  district 
  Messrs. 
  Blake 
  and 
  Hudleston 
  

   obtained 
  a 
  large 
  fauna 
  ; 
  the 
  Cidaris-florigemma 
  Rag 
  contained, 
  at 
  

   Hilmarton, 
  28 
  species. 
  

  

  The 
  Coralline 
  Oolite 
  and 
  Calc 
  Grit 
  of 
  Highworth 
  contain 
  a 
  fine 
  

   assemblage 
  of 
  fossils 
  (37 
  species). 
  The 
  Corallian 
  rocks 
  in 
  the 
  neigh- 
  

   bourhood 
  of 
  Faringdon, 
  and 
  at 
  Marcham, 
  Cumnor, 
  Headington, 
  and 
  

   Wheatley 
  arc 
  described, 
  and 
  the 
  special 
  faunas 
  of 
  these 
  localities 
  are 
  

   given 
  by 
  the 
  authors. 
  The 
  most 
  singular 
  exposure 
  of 
  the 
  Corallian 
  

   Rocks 
  occurs 
  at 
  Upware, 
  between 
  Cambridge 
  and 
  Ely. 
  These 
  beds 
  are 
  

   probably 
  the 
  highest 
  in 
  the 
  Corallian 
  scries 
  ; 
  on 
  them 
  lie 
  the 
  phos- 
  

   phatic 
  nodules 
  and 
  sands 
  of 
  the 
  Neocomian 
  beds. 
  The 
  corals 
  and 
  

   other 
  fossils 
  undoubtedly 
  prove 
  this 
  Upware 
  exposure 
  to 
  be 
  " 
  Coral 
  

   Rag." 
  It 
  is 
  peculiar 
  in 
  its 
  lithological 
  characters 
  ; 
  and 
  the 
  irregu- 
  

   larity 
  of 
  the 
  bedding 
  is 
  indicative 
  of 
  its 
  " 
  reef-like 
  character," 
  to 
  

   which 
  condition, 
  and 
  not 
  entirely 
  to 
  denudation, 
  Messrs. 
  Hudleston 
  

   and 
  Blake 
  attribute 
  its 
  termination. 
  No 
  Ammonites 
  have 
  yet 
  oc- 
  

   * 
  Loc. 
  cit. 
  p. 
  276, 
  for 
  section 
  and 
  description. 
  

  

  