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  industry 
  have 
  almost 
  solely 
  contributed 
  to 
  bring 
  out 
  the 
  rare 
  and 
  beau- 
  

   tiful 
  exhibition 
  of 
  fossils 
  from 
  the 
  rocks 
  surrounding 
  his 
  native 
  valley. 
  

   Those, 
  therefore, 
  who 
  desire 
  to 
  contribute 
  specimens 
  may 
  feel 
  assured 
  

   that 
  in 
  the 
  hands 
  of 
  Mr. 
  Gebhard, 
  every 
  fossil 
  will 
  be 
  fully 
  appreciated 
  

   and 
  carefully 
  preserved. 
  

  

  BUTHOTREPHIS 
  ? 
  C^SPETOSA, 
  (n. 
  species.) 
  

   Plate 
  1, 
  fig. 
  1, 
  a, 
  b, 
  c. 
  

  

  Plant 
  at 
  base 
  composed 
  of 
  numerous 
  coalescing 
  stems 
  which 
  in 
  as- 
  

   cending 
  are 
  frequently 
  bifurcated 
  ; 
  branches 
  tapering 
  to 
  acute 
  points. 
  

  

  The 
  mode 
  of 
  growth 
  is 
  very 
  peculiar 
  in 
  this 
  species 
  ; 
  in 
  all 
  the 
  indi- 
  

   viduals 
  seen 
  the 
  base 
  appears 
  like 
  a 
  coalescing 
  or 
  twisted 
  bundle 
  of 
  

   stems, 
  which 
  separate 
  and 
  expand 
  above, 
  frequently 
  bifurcating 
  in 
  their 
  

   extension. 
  Several 
  specimens 
  of 
  this 
  species 
  have 
  been 
  found 
  in 
  the 
  

   lower 
  part 
  of 
  the 
  Trenton 
  limestone. 
  It 
  is 
  extremely 
  different 
  from 
  all 
  

   the 
  other 
  species 
  of 
  the 
  genus 
  and 
  may 
  perhaps 
  be 
  referred 
  with 
  al- 
  

   most 
  equal 
  propriety 
  to 
  the 
  genus 
  Palceophycus, 
  though 
  when 
  better 
  

   known 
  it 
  will 
  probably 
  be 
  separated 
  from 
  both 
  these 
  genera. 
  

  

  This 
  species 
  has 
  been 
  found 
  in 
  the 
  vicinity 
  of 
  Watertown, 
  Jefferson 
  

   county, 
  and 
  occurs 
  in 
  thin 
  layers, 
  exposed 
  by 
  the 
  action 
  of 
  the 
  water 
  of 
  

   the 
  river, 
  near 
  the 
  lower 
  part 
  of 
  the 
  formation. 
  

  

  RETEPORA 
  FENESTRATA, 
  (n. 
  species.) 
  

   Plate 
  2, 
  fig. 
  1, 
  a, 
  b, 
  c, 
  d, 
  e. 
  

  

  Frond 
  much 
  expanded, 
  loosely 
  reticulate; 
  branches 
  rounded, 
  frequent- 
  

   ly 
  bifurcating, 
  united 
  laterally 
  by 
  transverse 
  bars 
  ; 
  non-poriferous 
  sur- 
  

   face 
  striated 
  ; 
  poriferous 
  side 
  of 
  branches 
  covered 
  with 
  numerous 
  small 
  

   angular 
  pores, 
  sometimes 
  with 
  poriferous 
  nodes 
  upon 
  the 
  poriferous 
  

   side 
  of 
  the 
  branches 
  ; 
  fenestrules 
  irregular 
  in 
  size 
  and 
  form. 
  

  

  This 
  species 
  is 
  very 
  peculiar 
  in 
  its 
  character, 
  appearing 
  at 
  first 
  view 
  

   1 
  ike 
  a 
  reticulated 
  coral 
  without 
  transverse 
  bars. 
  The 
  growth 
  and 
  bifur- 
  

   cation 
  of 
  the 
  branches 
  appear 
  to 
  have 
  been 
  quite 
  irregular 
  and 
  they 
  

   approach 
  each 
  other 
  so 
  closely 
  as 
  often 
  to 
  appear 
  as 
  if 
  coalescing. 
  Itt 
  

   the 
  presence 
  of 
  transverse 
  bars, 
  which 
  are 
  apparently 
  non-poriferous, 
  

   uniting 
  the 
  branches, 
  it 
  differs 
  from 
  Eetepora, 
  to 
  which 
  it 
  is 
  closely 
  

   allied 
  in 
  other 
  respects. 
  In 
  the 
  rounded 
  branches 
  and 
  transverse 
  non- 
  

   celluliferous 
  dissepiments 
  it 
  resembles 
  Polypora, 
  but 
  the 
  cells 
  are 
  an- 
  

   gular 
  as 
  in 
  Retepora, 
  and 
  the 
  coral 
  has 
  the 
  general 
  aspect 
  of 
  that 
  genus. 
  

  

  Fig. 
  1, 
  a, 
  a 
  specimen 
  of 
  this 
  coral 
  upon 
  the 
  surface 
  of 
  a 
  fragment 
  

   of 
  limestone. 
  In 
  some 
  parts 
  the 
  coral 
  appears 
  to 
  be 
  distinctly 
  retic- 
  

   ulated, 
  while 
  in 
  others 
  the 
  branches 
  are 
  united 
  by 
  transverse 
  bars'. 
  

  

  