﻿HUDSON 
  RIVER 
  BEDS 
  NEAR 
  ALBANY 
  529 
  

  

  Eopolychaetus 
  albaniensis 
  sp. 
  n. 
  

  

  Pontobdellopsis 
  cometa 
  sp. 
  n. 
  1 
  

  

  Leptobolus 
  insignis, 
  Hall 
  

  

  Schizambon 
  (?) 
  fissus 
  var. 
  canadensis 
  Ami 
  

  

  Hormotoma 
  of. 
  gracilis, 
  Hall 
  sp. 
  

  

  With 
  the 
  exception 
  of 
  Dendrograptus, 
  which 
  at 
  this 
  

   locality 
  is 
  of 
  rare 
  occurrence, 
  all 
  graptolites 
  of 
  this 
  fauna 
  were 
  

   found 
  in 
  the 
  lowest 
  Utica 
  shale 
  at 
  Panton 
  Vt. 
  As 
  the 
  same 
  

   combination 
  of 
  graptolites 
  has 
  also 
  been 
  observed 
  on 
  slabs 
  from 
  

   the 
  neighborhood 
  of 
  Amsterdam 
  N. 
  Y., 
  it 
  seems 
  to 
  constitute 
  a 
  

   faunule 
  characteristic 
  of 
  a 
  certain 
  horizon 
  of 
  the 
  Utica 
  shale 
  

   in 
  New 
  York, 
  evidently 
  of 
  the 
  lower 
  part 
  of 
  the 
  formation. 
  In 
  

   all 
  three 
  localities 
  the 
  graptolites 
  are 
  rarely 
  found 
  mixed 
  but 
  

   occur 
  on 
  different 
  surfaces 
  of 
  closely 
  adjoining 
  layers; 
  only 
  the 
  

   rarer 
  D. 
  spinulosus 
  mingling 
  with 
  the 
  others, 
  as 
  if 
  they 
  

   were 
  assorted 
  according 
  to 
  their 
  weight 
  while 
  drifting 
  about. 
  

   The 
  other 
  graptolites 
  of 
  the 
  Utica 
  shale 
  occur 
  for 
  the 
  most 
  part 
  

   separately 
  in 
  the 
  shales 
  of 
  the 
  Mohawk 
  valley; 
  this 
  is 
  specially 
  

   notable 
  of 
  Olimacograptus 
  typicalis, 
  CI. 
  bicor- 
  

   n 
  i 
  s 
  and 
  Diplograptus 
  ruedemanni. 
  

  

  Station 
  15. 
  Old 
  Dudley 
  observatory, 
  Albany 
  

  

  3 
  miles 
  S 
  SW 
  of 
  the 
  Rural 
  cemetery 
  exposure 
  and 
  just 
  north 
  

   of 
  Albany, 
  on 
  Patroon's 
  creek 
  near 
  the 
  old 
  Dudley 
  observatory 
  

   (station 
  15) 
  is 
  the 
  exposure 
  from 
  where 
  Dr 
  Beecher, 
  in 
  1889, 
  ob- 
  

   tained 
  the 
  first 
  unmistakable 
  Utica 
  fauna 
  from 
  the 
  Hudson 
  river 
  

   shales 
  (see 
  p. 
  502). 
  

  

  whole 
  is 
  more 
  slender 
  and 
  flexible 
  (only 
  .1 
  mm 
  wide), 
  but 
  its 
  thickest 
  basal 
  

   parts 
  correspond 
  in 
  thickness 
  to 
  the 
  terminal 
  parts 
  of 
  that 
  extremely 
  

   delicate 
  graptolite 
  whose 
  thin 
  filiform 
  ends 
  also 
  show 
  at 
  times 
  an 
  inclina- 
  

   tion 
  to 
  become 
  convolute. 
  Furthermore 
  most 
  of 
  the 
  branches 
  possess 
  the 
  

   same 
  smooth, 
  unindented 
  character 
  and 
  apparently, 
  though 
  not 
  distiuct 
  

   enough 
  to 
  permit 
  positive 
  assertion, 
  small 
  pits 
  along 
  the 
  median 
  liue. 
  In 
  

   the 
  absence 
  of 
  more 
  complete 
  material, 
  it 
  seems 
  therefore 
  justifiable 
  to 
  

   consider 
  this 
  fossil 
  as 
  consisting 
  of 
  the 
  broken, 
  thin 
  filiform 
  ends 
  of 
  

   Dendrograptus 
  tenuiramosusora 
  similar 
  species. 
  

   1 
  See 
  description 
  of 
  these 
  fossils 
  p. 
  574. 
  

  

  