﻿HUDSON 
  RIVER 
  BEDS 
  NEAR 
  ALBANY 
  501 
  

  

  c 
  e 
  a 
  , 
  Strophomena 
  alter 
  nata, 
  Escharopora 
  

   recta, 
  Ptilodictya 
  acuta, 
  caudal 
  shield 
  of 
  a 
  small 
  tri- 
  

   lobite 
  probably 
  Asaphus 
  vetustus, 
  Endoceras 
  (prob- 
  

   ably 
  proteiforme), 
  Orthoceras, 
  not 
  well 
  defined, 
  

   spiral 
  univalves, 
  Chaetetes 
  named 
  C 
  h 
  . 
  tenuissima, 
  

   encrinal 
  columns, 
  Receptaculites. 
  

  

  In 
  another 
  paper 
  (24) 
  the 
  same 
  investigator 
  states 
  that 
  the 
  

   Chaetetes 
  with 
  fine 
  columns 
  has 
  been 
  identified, 
  in 
  part 
  at 
  

   least, 
  asStromatopora 
  com 
  pa 
  eta, 
  Billings, 
  and 
  adds 
  as 
  

   new 
  from 
  Rochdale 
  a 
  number 
  of 
  Cyathophylloid 
  corals, 
  among 
  

   them, 
  with 
  little 
  doubt, 
  Petraia 
  corniculum, 
  a 
  caudal 
  

   shield 
  of 
  a 
  trilobite 
  which 
  has 
  been 
  identified 
  by 
  Ford 
  as 
  

   Illaenus 
  eras 
  sic 
  auda, 
  and 
  a 
  head 
  of 
  Echino-encri- 
  

   nites 
  anatiformis. 
  

  

  He 
  also 
  found 
  in 
  the 
  continuation 
  of 
  the 
  limestone 
  belt 
  across 
  

   the 
  Hudson, 
  2f 
  miles 
  north 
  of 
  Kewburgh 
  ferry: 
  Or 
  this 
  lynx, 
  

   O. 
  pectinella, 
  Rhynchonella 
  capax, 
  Leptaena 
  

   sericea, 
  Strophomena 
  alternata, 
  a 
  new 
  D 
  i 
  s 
  c 
  i 
  n 
  a 
  

   (later 
  described 
  as 
  D. 
  conic 
  a), 
  Chaetetes 
  compact 
  a, 
  

   very 
  abundant, 
  Oh. 
  lycoperdon 
  var. 
  ramosus, 
  Schi- 
  

   zocrinus 
  n 
  o 
  d 
  o 
  s 
  u 
  s, 
  E 
  c 
  h 
  i 
  n 
  o-e 
  n 
  c 
  r 
  i 
  n 
  i 
  t 
  e 
  s 
  anati- 
  

   formis, 
  probably 
  O. 
  tricenaria, 
  and 
  Petraia 
  corni- 
  

   culum. 
  

  

  The 
  author 
  adds: 
  " 
  These 
  developments 
  establish 
  this 
  beyond 
  

   doubt 
  as 
  a 
  stratum 
  of 
  the 
  Trenton 
  limestone 
  ". 
  A 
  farther 
  

   conclusion 
  which 
  could 
  be 
  drawn, 
  is 
  that 
  these 
  faunas 
  contain 
  

   no 
  forms 
  characteristic 
  of 
  or 
  restricted 
  to 
  the 
  upper 
  Trenton, 
  

   while 
  they 
  distinctly 
  point 
  to 
  a 
  lower 
  and 
  perhaps 
  in 
  some 
  de- 
  

   gree 
  middle 
  Trenton 
  age 
  for 
  the 
  beds; 
  for 
  Orthis 
  tricen- 
  

   aria 
  and 
  Petraia 
  corniculum 
  are 
  restricted 
  to 
  the 
  lower 
  

   Trenton, 
  Illaenus 
  crassicauda 
  occurs 
  in 
  the 
  upper 
  Low- 
  

   ville 
  and 
  Trenton 
  limestone, 
  Schizocrinus 
  nodosus 
  is 
  

   most 
  abundant 
  in 
  the 
  lower 
  Trenton, 
  Ptilodictya 
  acuta 
  

   and 
  Escharopora 
  recta 
  occur 
  only 
  in 
  the 
  lower 
  and 
  cen- 
  

   tral 
  part 
  of 
  the 
  Trenton, 
  Echino-encrinites 
  anati- 
  

   formis 
  is 
  a 
  middle 
  Trenton 
  form, 
  and 
  the 
  abundant 
  Chae- 
  

   tetes 
  compacta 
  is 
  restricted 
  to 
  the 
  Black 
  river. 
  

  

  