﻿68 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Nov. 
  18, 
  

  

  and 
  Siliquaria 
  Granti, 
  Sow., 
  occur 
  also 
  in 
  the 
  Miocene 
  of 
  Europe 
  ; 
  

   the 
  fourth 
  known 
  species 
  is 
  Natica 
  sigaretina 
  ?, 
  Desh., 
  about 
  which 
  

   they 
  are 
  doubtful, 
  besides 
  its 
  being 
  a 
  species 
  the 
  limits 
  of 
  which 
  are 
  

   uncertain, 
  and 
  consequently 
  its 
  range 
  in 
  time. 
  There 
  are 
  but 
  three 
  

   other 
  species 
  from 
  this 
  rock, 
  including 
  Vicarya 
  Verneuilii, 
  all 
  of 
  

   which 
  are 
  new, 
  and, 
  with 
  the 
  exception 
  of 
  the 
  species 
  mentioned, 
  

   come, 
  I 
  suppose, 
  into 
  the 
  category 
  of 
  " 
  forms." 
  

  

  Amongst 
  the 
  fossils 
  from 
  the 
  same 
  locality 
  having 
  the 
  more 
  

   usual 
  matrix 
  are 
  Cardium 
  anomale, 
  Math., 
  Nucula 
  margaritacea, 
  

   Lam., 
  Mytilus 
  liihophagus, 
  Linn., 
  Trochus 
  cumulans, 
  Brongn., 
  and 
  T. 
  

   agglutinans, 
  Lam. 
  Nearly 
  all 
  of 
  these 
  have 
  marks 
  of 
  doubt 
  attached 
  

   to 
  them, 
  and 
  their 
  occurrence 
  in 
  the 
  Nummulitic 
  rocks 
  of 
  India 
  ap- 
  

   peared 
  somewhat 
  remarkable 
  to 
  the 
  authors 
  of 
  the 
  great 
  work 
  on 
  the 
  

   fossils 
  of 
  that 
  formation. 
  

  

  An 
  investigation 
  into 
  the 
  claims 
  of 
  MM. 
  d'Archiac 
  and 
  Haime's 
  

   " 
  forms 
  " 
  to 
  rank 
  as 
  true 
  species 
  would 
  furnish 
  more 
  than 
  sufficient 
  

   material 
  for 
  a 
  special 
  paper 
  by 
  an 
  experienced 
  palaeontologist 
  ; 
  but, 
  

   adopting 
  their 
  views 
  for 
  the 
  present, 
  it 
  may 
  be 
  remarked 
  that 
  some 
  

   of 
  the 
  new 
  species 
  of 
  Mollusca 
  described 
  by 
  them, 
  the 
  majority 
  of 
  

   which 
  are 
  merely 
  casts, 
  are 
  stated 
  to 
  be 
  most 
  nearly 
  allied 
  to 
  Mio- 
  

   cene 
  species 
  ; 
  and, 
  as 
  regards 
  the 
  Nummulites, 
  two 
  species, 
  according 
  

   to 
  those 
  authors, 
  are 
  identical 
  with 
  forms 
  occurring 
  in 
  the 
  Miocene 
  

   Basin 
  of 
  the 
  Adour, 
  namely, 
  Nummulina 
  intermedia 
  and 
  N. 
  Garan- 
  

   sensis. 
  From 
  a 
  consideration 
  of 
  these 
  facts, 
  MM. 
  d'Archiac 
  and 
  

   Haime 
  conclude 
  that 
  the 
  Nummulitic 
  formation 
  of 
  India 
  consists 
  of 
  

   three 
  series 
  of 
  beds 
  of 
  slightly 
  different 
  ages 
  ; 
  but 
  they 
  do 
  not 
  con- 
  

   sider 
  either 
  of 
  them 
  to 
  belong 
  to 
  the 
  Miocene 
  period. 
  

  

  Dr. 
  H. 
  J. 
  Carter, 
  F.R.S., 
  of 
  Bombay, 
  at 
  one 
  time 
  considered 
  the 
  

   Soomrow 
  (Cutch) 
  fossils, 
  which 
  were 
  figured 
  by 
  Mr. 
  Sowerby 
  as 
  

   "Tertiary" 
  in 
  contradistinction 
  to 
  " 
  Nummulitic"*, 
  to 
  belong 
  to 
  

   the 
  Miocene 
  period 
  f 
  ; 
  and 
  M. 
  d'Orbigny, 
  in 
  his 
  " 
  Prodrome 
  de 
  

   Paleontologie," 
  referred 
  many 
  of 
  the 
  Indian 
  Nummulitic 
  fossils 
  to 
  his 
  

   " 
  Iitage 
  Falunien," 
  a 
  determination 
  somewhat 
  severely 
  criticized 
  by 
  

   MM. 
  d'Archiac 
  and 
  Haime. 
  More 
  recently, 
  Prof. 
  H. 
  B. 
  Medlicott, 
  

   F.G.S., 
  one 
  of 
  the 
  most 
  experienced 
  of 
  Indian 
  geologists, 
  has 
  argued 
  J 
  

   that 
  the 
  so-called 
  Nummulitic 
  rocks 
  of 
  Subathoo, 
  referred 
  by 
  MM. 
  

   d'Archiac 
  and 
  Haime 
  to 
  one 
  formation, 
  belong 
  to 
  two 
  horizons. 
  If 
  

   this 
  be 
  true 
  of 
  one 
  region 
  (and 
  Prof. 
  Medlicott's 
  reputation 
  as 
  an 
  

   Indian 
  geologist 
  renders 
  it 
  very 
  probable), 
  it 
  is 
  most 
  likely 
  to 
  be 
  

   true 
  of 
  another, 
  especially 
  as 
  one 
  of 
  the 
  new 
  species 
  with 
  a 
  ferrugi- 
  

   nous 
  matrix 
  has 
  been 
  found 
  also 
  at 
  Subathoo. 
  

  

  It 
  will 
  be 
  seen, 
  therefore, 
  that 
  the 
  uniformly 
  Eocene 
  date 
  of 
  all 
  

   the 
  beds 
  belonging 
  to 
  the 
  Nummulitic 
  formation 
  of 
  India 
  is 
  still 
  

   uncertain, 
  and 
  it 
  remains 
  for 
  future 
  researches 
  to 
  elucidate 
  this 
  

   really 
  important 
  problem. 
  

  

  5. 
  Evidences 
  of 
  Physical 
  Conditions. 
  — 
  Returning 
  to 
  the 
  Javan 
  fos- 
  

  

  * 
  Trans. 
  G-eol. 
  Soc. 
  Lond. 
  2nd 
  ser. 
  vol. 
  v. 
  part 
  2. 
  pis. 
  25 
  & 
  26. 
  

   t 
  Compare 
  Journ. 
  Bombay 
  Eoy. 
  Asiat. 
  Soc. 
  vol. 
  v. 
  pp. 
  179 
  etseq. 
  with 
  " 
  Geo- 
  

   logical 
  Papers 
  on 
  Western 
  India," 
  p. 
  743 
  (footnote). 
  

   { 
  Journ. 
  Beng. 
  Asiat. 
  Soc. 
  vol. 
  xxx. 
  pp. 
  22 
  et 
  seq. 
  

  

  