﻿LOWER 
  CRETACEOUS 
  SERIES 
  : 
  NIMAR 
  SANDSTONE. 
  33 
  

  

  district 
  of 
  Kawant, 
  there 
  occur 
  in 
  the 
  soft, 
  thinly-stratified 
  shaly 
  beds 
  

   towards 
  the 
  top 
  of 
  the 
  series 
  well-preserved 
  tracks 
  of 
  at 
  least 
  two 
  kinds 
  

   of 
  animals. 
  One 
  of 
  these 
  resembles 
  Nereites 
  cambrensis 
  1 
  (a 
  marine 
  

   annelid), 
  and 
  the 
  other 
  is 
  not 
  unlike 
  Bifurculapes 
  laqueatus 
  (an 
  arthro- 
  

   pod), 
  from 
  the 
  Connecticut 
  river 
  sandstone. 
  2 
  These 
  fossils 
  have 
  been 
  

   sent 
  to 
  England 
  for 
  determination 
  by 
  competent 
  authority. 
  

  

  Oyster-bed. 
  — 
  At 
  Pipri-Amlipura, 
  6 
  miles 
  north-east 
  of 
  Bag, 
  and 
  

   nearly 
  as 
  many 
  miles 
  south 
  of 
  Tanda, 
  close 
  to 
  the 
  road 
  which 
  leads 
  

   from 
  Tanda 
  to 
  Dehri, 
  I 
  came 
  upon 
  an 
  oyster-bed 
  exactly 
  similar 
  to 
  

   that 
  described 
  above 
  as 
  occurring 
  at 
  Ghatia. 
  About 
  a 
  foot 
  in 
  thickness, 
  

   it 
  rests 
  quite 
  conformably 
  upon 
  some 
  horizontal, 
  extremely 
  coarse 
  grit- 
  

   stones 
  of 
  insignificant 
  thickness 
  (about 
  5 
  feet), 
  and 
  passes 
  above, 
  equally 
  

   without 
  break, 
  into 
  the 
  lowest 
  beds 
  of 
  the 
  upper 
  cretaceous 
  limestone 
  

   series 
  (nodular 
  limestone). 
  The 
  rock, 
  like 
  that 
  of 
  Ghatia, 
  is 
  almost 
  

   literally 
  made 
  up 
  of 
  layers 
  of 
  oysters 
  from 
  \ 
  inch 
  to 
  over 
  7 
  inches 
  

   in 
  length. 
  Associated 
  with 
  the 
  Lamellibranch 
  were 
  a 
  Gasteropod, 
  

   which 
  I 
  took 
  to 
  be 
  Natica, 
  and 
  several 
  pieces 
  of 
  undeterminable 
  bone. 
  

   Of 
  the 
  Ostrcea 
  there 
  are 
  at 
  least 
  two 
  well-marked 
  forms 
  ; 
  but 
  these 
  may 
  

   be 
  varieties. 
  The 
  species 
  is 
  near, 
  as 
  far 
  as 
  I 
  can 
  make 
  out, 
  to 
  Ostraa 
  

   leymerii, 
  an 
  European 
  neocornian 
  form. 
  Both 
  at 
  Ghatia 
  and 
  Amlipura 
  

   the 
  fossilised 
  oyster-beds 
  cover 
  areas 
  of 
  quite 
  inconsiderable 
  extent. 
  

  

  At 
  Ghatia 
  the 
  oyster-bed 
  passes 
  under 
  flesh-coloured 
  limestones 
  with 
  

   Bryozoa 
  and 
  bivalves 
  elsewhere 
  met 
  with 
  in 
  the 
  nodular 
  limestone, 
  as 
  

   well 
  as 
  with 
  diminutive 
  forms 
  of 
  the 
  Ostrcea 
  just 
  described 
  in 
  much 
  

   diminished 
  numbers. 
  At 
  Yalam, 
  4 
  miles 
  to 
  the 
  west, 
  a 
  sandstone, 
  with 
  

   the 
  same 
  oysters 
  sparsely 
  distributed 
  through 
  it 
  at 
  the 
  base 
  of 
  the 
  lime- 
  

   stone, 
  probably 
  represents 
  the 
  oyster-bed 
  of 
  Ghatia. 
  West 
  of 
  Bag, 
  the 
  

   oysters 
  are 
  met 
  with 
  at 
  places 
  (never 
  in 
  such 
  abundance 
  as 
  at 
  Ghatia 
  or 
  

   Amlipura) 
  always 
  at 
  the 
  top 
  of 
  the 
  sandstone 
  series; 
  and 
  south 
  of 
  

   Kawant 
  they 
  would 
  appear 
  to 
  be 
  rather 
  numerous 
  at 
  Chikli 
  (B) 
  and 
  

   Mongra. 
  

  

  1 
  " 
  Silurian 
  system," 
  pi. 
  27, 
  fig. 
  1. 
  

  

  a 
  " 
  Icbnographs 
  of 
  the 
  Connecticut 
  river 
  sandstone," 
  p. 
  26, 
  pi. 
  41, 
  fig. 
  5. 
  

  

  c 
  ( 
  &3 
  ) 
  

  

  