﻿274 
  GEOLOGY. 
  

  

  A 
  table 
  of 
  all 
  the 
  species 
  found 
  in 
  the 
  scope 
  indicated 
  

   will 
  be 
  found 
  annexed; 
  and 
  for 
  a 
  more 
  particular 
  acquaint- 
  

   ance 
  with 
  the 
  most 
  characteristic 
  the 
  reader 
  is 
  referred 
  

   to 
  the 
  Journal 
  of 
  the 
  Academy 
  of 
  Natural 
  Sciences, 
  vol. 
  i. 
  

   Plates, 
  11, 
  12, 
  13, 
  and 
  14, 
  and 
  vol. 
  ii. 
  Plate 
  1. 
  

  

  The 
  fossils 
  of 
  this 
  locality 
  are 
  not 
  confined 
  to 
  the 
  

   testacea, 
  but 
  with 
  them 
  are 
  associated 
  the 
  spines 
  and 
  

   rays 
  of 
  fishes, 
  together 
  with 
  their 
  dental 
  plates, 
  otolites, 
  

   and 
  scales, 
  as 
  well 
  as 
  the 
  teeth 
  of 
  several 
  species 
  of 
  the 
  

   shark 
  family 
  — 
  among 
  them 
  the 
  Carcharodon 
  agustidens 
  

   and 
  Galeocerdo 
  latidens 
  of 
  Agassiz. 
  The 
  Saurocephalus 
  

   lanciformis 
  of 
  Harlan 
  is 
  also 
  found. 
  

  

  The 
  branched 
  coral, 
  Madrepora 
  Miasissippiensis 
  of 
  

   Conrad, 
  is 
  abundant, 
  and 
  one 
  small 
  specimen 
  of 
  a 
  species 
  

   which 
  seems 
  nearly 
  allied, 
  if 
  not 
  identical, 
  with 
  that 
  of 
  

   the 
  rock 
  used 
  in 
  the 
  walls 
  of 
  the 
  Castle 
  of 
  San 
  Juan 
  

   d'Ulloa, 
  Vera 
  Cruz, 
  has 
  been 
  obtained. 
  

  

  Similar 
  beds 
  are 
  represented 
  as 
  occurring 
  in 
  the 
  blufis 
  

   on 
  Big 
  Black 
  River, 
  and 
  on 
  Baker's 
  Creek, 
  in 
  Hinds 
  

   County. 
  Whether 
  these 
  are 
  identical 
  with 
  the 
  Vicks- 
  

   burg 
  fossils, 
  or 
  assimilate 
  more 
  nearly 
  to 
  those 
  found 
  

   in 
  the 
  tertiary 
  green-sand 
  marl 
  of 
  Jackson, 
  remains 
  to 
  be 
  

   determined. 
  

  

  This 
  latter 
  deposit 
  is 
  seen 
  most 
  advantageously 
  in 
  the 
  

   bed 
  of 
  the 
  creek 
  emptying 
  into 
  Pearl 
  River 
  immediately 
  

   below 
  the 
  crossing 
  of 
  the 
  Jackson 
  and 
  Brandon 
  Rail- 
  

   road. 
  The 
  bed 
  lies 
  about 
  fifteen 
  feet 
  below 
  the 
  level 
  of 
  

   the 
  adjacent 
  plain, 
  and 
  about 
  four 
  feet 
  of 
  its 
  thickness 
  

   are 
  exposed 
  in 
  the 
  banks 
  of 
  the 
  creek. 
  Its 
  entire 
  depth 
  

   has 
  not 
  been 
  ascertained. 
  

  

  The 
  marl 
  is 
  of 
  a 
  bluish-green 
  color 
  in 
  its 
  moist 
  state, 
  

   and 
  in 
  the 
  bed 
  is 
  of 
  considerable 
  toughness 
  and 
  tenacity. 
  

   Upon 
  exposure, 
  and 
  becoming 
  thoroughly 
  dried, 
  it 
  parts 
  

   with 
  much 
  of 
  its 
  color, 
  crumbles 
  to 
  a 
  granular 
  sand-like 
  

  

  