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  GEOLOGY. 
  

  

  For 
  the 
  subjoined 
  catalogue, 
  I 
  am 
  indebted 
  to 
  Timothy 
  

   A. 
  Conrad, 
  Esq., 
  whose 
  extensive 
  investigations 
  among 
  

   the 
  fossils 
  of 
  the 
  cretaceous 
  and 
  tertiary 
  formations, 
  

   renders 
  him 
  the 
  most 
  competent 
  authority 
  we 
  have 
  in 
  

   this 
  department 
  of 
  our 
  Natural 
  history. 
  These 
  fossils 
  

   have 
  been 
  determined 
  and 
  named 
  by 
  him, 
  and 
  prove 
  for 
  

   the 
  cliief 
  part, 
  new 
  and 
  undescribed 
  species. 
  

  

  In 
  the 
  lime-rock 
  exposed 
  by 
  the 
  cut 
  in 
  the 
  railroad 
  

   near 
  Brandon, 
  Plate 
  XII., 
  Fig. 
  1, 
  the 
  Scutella 
  Rogersi 
  

   of 
  Morton 
  is 
  abundant, 
  but 
  so 
  firmly 
  imbedded 
  as 
  to 
  be 
  

   detached 
  with 
  difficulty, 
  and 
  very 
  rarely 
  entire. 
  

  

  Imbedded 
  in 
  the 
  lime-rock 
  at 
  Marshall's 
  quarry, 
  are 
  

   found 
  the 
  Spatangus, 
  Madrepora 
  Mississippiensis, 
  Crus- 
  

   tacea, 
  and 
  shells, 
  together 
  with 
  numerous 
  casts 
  of 
  

   j)anopea. 
  

  

  Fish 
  finely 
  preserved, 
  and 
  exhibiting 
  the 
  fins 
  and 
  

   scales 
  very 
  distinctly, 
  have 
  also 
  been 
  obtained 
  in 
  this 
  

   rock, 
  as 
  well 
  as 
  a 
  fossil 
  which 
  has 
  somewhat 
  the 
  appear- 
  

   ance 
  which 
  collolites 
  present, 
  but 
  which 
  result, 
  perhaps, 
  

   from 
  the 
  ravages 
  of 
  teredinae. 
  

  

  Fossils 
  of 
  the 
  same 
  character 
  are 
  to 
  be 
  had 
  at 
  Stew- 
  

   ard's 
  quarry, 
  but 
  have 
  been 
  less 
  observed. 
  

  

  In 
  the 
  crabs 
  found 
  in 
  these 
  quarries, 
  the 
  carapace 
  and 
  

   other 
  plates, 
  as 
  well 
  as 
  the 
  claws, 
  are 
  well 
  defined, 
  the 
  

   latter, 
  however, 
  being 
  often 
  absent 
  or 
  detached, 
  wholly 
  

   or 
  in 
  part. 
  

  

  At 
  Long's 
  Quarry, 
  eight 
  miles 
  south 
  of 
  Jackson, 
  when 
  

   it 
  was 
  formerly 
  worked, 
  many 
  similar 
  fossils 
  of 
  an 
  in- 
  

   teresting 
  description 
  were 
  brought 
  to 
  light, 
  and 
  sharks' 
  

   teeth 
  of 
  small 
  size, 
  were 
  common 
  there. 
  

  

  A 
  fine 
  specimen 
  of 
  Carcharodon 
  megalodon, 
  of 
  Agas- 
  

   siz, 
  of 
  good 
  size, 
  was 
  found 
  in 
  the 
  gypseous 
  marl 
  of 
  Ball 
  

   Prairie, 
  a 
  few 
  miles 
  southeast 
  of 
  Clinton, 
  Hinds 
  County. 
  

  

  