﻿608 
  MR. 
  G. 
  W. 
  LA3IPLCGH 
  OX 
  THE 
  

  

  Many 
  very 
  interesting 
  questions 
  arise 
  with 
  regard 
  to 
  the 
  correla- 
  

   tion 
  of 
  the 
  divisions 
  as 
  now 
  proposed 
  in 
  the 
  Speeton 
  beds 
  with 
  the 
  

   beds 
  of 
  similar 
  age 
  in 
  Lincolnshire 
  and 
  abroad, 
  but 
  with 
  these 
  it 
  is 
  

   not 
  for 
  roe 
  to 
  deal. 
  

  

  In 
  conclusion, 
  I 
  beg 
  to 
  render 
  my 
  hearty 
  thanks 
  to 
  Messrs. 
  G. 
  

   Sharman 
  and 
  E. 
  T. 
  Xewton, 
  to 
  Mr. 
  T. 
  Roberts, 
  to 
  Dr. 
  James 
  Carter, 
  

   and 
  to 
  Mr. 
  J. 
  F. 
  Walker, 
  for 
  their 
  invaluable 
  assistance 
  in 
  deter- 
  

   mining 
  the 
  fossils, 
  to 
  Mr. 
  C. 
  Fox-Strangways 
  for 
  his 
  advice 
  and 
  aid 
  

   in 
  many 
  ways, 
  and 
  to 
  Mr. 
  TV. 
  B. 
  Headley 
  for 
  the 
  loan 
  of 
  specimens 
  

   and 
  for 
  his 
  freely-rendered 
  help 
  in 
  collecting. 
  

  

  Note, 
  July 
  1, 
  1889. 
  — 
  Since 
  this 
  paper 
  was 
  read, 
  I 
  have 
  received 
  

   copies 
  of 
  two 
  important 
  contributions 
  to 
  the 
  literature 
  of 
  the 
  subject*, 
  

   of 
  which 
  the 
  authors 
  are 
  two 
  eminent 
  Eussian 
  geologists 
  who 
  visited 
  

   Speeton 
  last 
  autumn 
  during 
  the 
  excursion 
  arranged 
  for 
  the 
  Geological 
  

   Congress. 
  I 
  had 
  the 
  pleasure 
  of 
  there 
  meeting 
  these 
  gentlemen, 
  

   Professor 
  A. 
  Pavlow, 
  of 
  the 
  Moscow 
  University, 
  and 
  M. 
  Serge 
  

   Xikitin, 
  of 
  the 
  Geological 
  Survey 
  of 
  "Russia 
  ; 
  and 
  it 
  is 
  partly 
  their 
  

   expressed 
  desire 
  for 
  further 
  information 
  regarding 
  the 
  section 
  that 
  

   has 
  led 
  me 
  to 
  publish 
  the 
  observations 
  printed 
  above. 
  

  

  In 
  these 
  papers 
  the 
  Upper 
  Jurassic 
  and 
  Lower 
  Cretaceous 
  beds 
  of 
  

   Eussia 
  and 
  England 
  are 
  compared, 
  and 
  results 
  of 
  great 
  importance 
  

   are 
  arrived 
  at. 
  

  

  Both 
  authors 
  agree 
  that 
  the 
  Speeton 
  section 
  affords 
  the 
  best 
  basis 
  

   for 
  this 
  comparison, 
  and 
  find 
  in 
  it 
  the 
  equivalents 
  of 
  Eu*sian 
  beds 
  

   which 
  had 
  hitherto 
  been 
  supposed, 
  to 
  be 
  unrepresented 
  in 
  Western 
  

   Europe. 
  

  

  They 
  see 
  in 
  the 
  ' 
  Zone 
  of 
  Belemnites 
  lateralis 
  ' 
  (which 
  fossil 
  is 
  

   declared 
  to 
  be 
  synonymous 
  with 
  Bel. 
  corpuleatus. 
  Xikitin; 
  the 
  

   equivalent 
  of 
  the 
  ' 
  Upper 
  Volga 
  beds 
  ' 
  of 
  Russia. 
  They 
  likewise 
  

   show 
  a 
  remarkable 
  parallelism 
  in 
  the 
  higher 
  portions 
  of 
  the 
  section, 
  

   recognizing 
  in 
  the 
  varieties 
  of 
  our 
  Ammonites 
  sjieetoneiisis 
  species 
  

   well 
  known 
  in 
  Eussia 
  (see 
  Appendix, 
  p. 
  613). 
  

  

  M. 
  Xikitin 
  indicates 
  that 
  our 
  ' 
  Noricus-heds 
  ' 
  are 
  also 
  represented 
  

   in 
  the 
  Simbirsk 
  section, 
  but 
  herein 
  Prof. 
  Pavlow 
  differs 
  from 
  him. 
  

   The 
  latter 
  author 
  believes 
  that 
  these 
  beds 
  are 
  wanting 
  in 
  that 
  sec- 
  

   tion, 
  and 
  that 
  the 
  gap 
  which 
  they 
  leave 
  represents 
  a 
  break 
  between 
  

   the 
  Jurassic 
  and 
  Cretaceous 
  portions 
  of 
  the 
  series 
  : 
  thus 
  he 
  relegates 
  

   the 
  whole 
  of 
  the 
  " 
  Volga 
  beds" 
  (and 
  with 
  them 
  their 
  equivalents 
  in 
  

   the 
  Speeton 
  section, 
  including 
  the 
  Lateralis-zone) 
  to 
  the 
  Jurassic. 
  

   M. 
  Xikitin, 
  however, 
  if 
  I 
  understand 
  his 
  meaning 
  aright, 
  would 
  

   place 
  the 
  " 
  Volga 
  beds 
  " 
  so 
  as 
  to 
  correlate 
  the 
  upper 
  portion 
  with 
  the 
  

   Lower 
  Cretaceous 
  and 
  the 
  lower 
  with 
  the 
  Upper 
  Jurassic. 
  

  

  * 
  M. 
  Serge 
  Xikitin. 
  'Quelques 
  Excursions 
  dans 
  les 
  Musses 
  et 
  dans 
  les 
  ter- 
  

   rains 
  Mesozo'iques 
  de 
  l'Europe 
  occidentale 
  : 
  et 
  comparaison 
  de 
  leur 
  faune 
  avee 
  

   celle 
  de 
  la 
  Russie.' 
  Printed 
  first 
  in 
  Russian 
  at 
  St. 
  Petersburg 
  towards 
  the 
  close 
  

   of 
  last 
  rear, 
  but 
  now 
  fortunately 
  rendered 
  more 
  generally 
  available 
  by 
  a 
  French 
  

   translation 
  printed 
  in 
  the 
  ' 
  Bulletin 
  de 
  la 
  Societe 
  Beige 
  de 
  Greologie,' 
  tome 
  iii. 
  

   (April 
  1889), 
  pp. 
  29-58. 
  

  

  Prof. 
  A. 
  Pavlow. 
  ' 
  Etudes.' 
  &e. 
  Pt. 
  I. 
  " 
  Jurassique 
  saperieur 
  et 
  Cretace 
  in- 
  

   ferieur 
  de 
  la 
  Russie 
  et 
  de 
  lAngleterre." 
  Avec 
  3 
  planches. 
  Moscou, 
  15S9. 
  

   (Printed 
  in 
  French.) 
  

  

  