﻿HUDSON 
  RIVER 
  BEDS 
  NEAR 
  ALBANY 
  541 
  

  

  C. 
  parvus, 
  Hall, 
  cc 
  

   O. 
  sp. 
  n. 
  1 
  

  

  Dawsoni 
  carupanulata, 
  Nicholson, 
  c 
  

   Leptobolus 
  walcotti 
  sp. 
  n. 
  r 
  

  

  Station 
  30. 
  North 
  end 
  of 
  Lansingburg 
  

  

  An 
  exceptionally 
  good 
  opportunity 
  for 
  collecting 
  was 
  offered 
  

   for 
  a 
  time 
  by 
  a 
  large 
  excavation 
  made 
  around 
  the 
  new 
  long 
  dis- 
  

   tance 
  telephone 
  power-house 
  at 
  the 
  north 
  end 
  of 
  Lansingburg, 
  

   north 
  of 
  Troy. 
  The 
  rock 
  consists 
  of 
  black, 
  fissile 
  argillaceous 
  

   shales, 
  black, 
  hard, 
  compact 
  argillite 
  and 
  intercalated, 
  green 
  ar- 
  

   gillaceous 
  shales. 
  The 
  black 
  shale 
  furnished: 
  

  

  Corynoides 
  calicularis, 
  Nicholson. 
  In 
  immense 
  number 
  

  

  Didymograptus 
  serratulus, 
  Hall, 
  rr 
  

  

  Dioranograptus 
  ramosus, 
  Hall, 
  r 
  

  

  Diplograptus 
  angustifolius, 
  Hall. 
  Completely 
  covering 
  some 
  

   surfaces 
  

  

  D. 
  off. 
  putillus, 
  Hall, 
  rr 
  

  

  D. 
  foliaceus, 
  Murchison. 
  sp. 
  c 
  

  

  D. 
  whitfieldi, 
  Hall, 
  c 
  

  

  Climacograptus 
  bieornis, 
  Hall, 
  c 
  

  

  O. 
  scharenbergi, 
  Lapicorth. 
  c 
  

  

  C. 
  sp. 
  n. 
  cc 
  

  

  C. 
  sp. 
  n. 
  c 
  

  

  The 
  faunas 
  of 
  Lansingburg 
  and 
  Mt 
  Olympus, 
  which 
  lie 
  in 
  the 
  

   same 
  strike 
  and 
  evidently 
  belong 
  together, 
  differ 
  in 
  general 
  as- 
  

   pect 
  from 
  that 
  of 
  the 
  lower 
  Dicellograptus 
  fauna 
  by 
  the 
  scarcity 
  

   of 
  branching 
  forms 
  and 
  the 
  strong 
  prevalence, 
  in 
  species 
  and 
  

   individuals, 
  of 
  the 
  biserrate 
  graptolites, 
  notably 
  of 
  the 
  genera 
  

   Diplograptus 
  and 
  Climacograptus. 
  They 
  ap- 
  

   proach 
  in 
  this 
  regard 
  the 
  fauna 
  of 
  the 
  upper 
  Dicellograptus 
  

   beds, 
  to 
  which 
  thej 
  r 
  could 
  be 
  referred, 
  were 
  it 
  not 
  for 
  the 
  occur- 
  

   rence 
  of 
  a 
  few 
  stipes 
  of 
  Didymograptus 
  tenuis, 
  

  

  x 
  The 
  new 
  species 
  of 
  graptolites 
  will 
  be 
  described 
  in 
  a 
  separate, 
  later 
  

   paper. 
  

  

  