﻿510 
  SEW 
  YORK 
  B 
  MUSI 
  

  

  support 
  of 
  ill 
  the 
  writer 
  d 
  to 
  point 
  our 
  the 
  follow- 
  

  

  •. 
  Wi«-li 
  caD 
  be< 
  d 
  from 
  Ami's 
  observations. 
  The 
  joint 
  

  

  nrrence 
  ol 
  a 
  lower 
  Trenton 
  fauna 
  nn 
  1 
  1 
  1 
  1 
  the 
  Normans 
  kill 
  fauna 
  

   in 
  tin- 
  Quebec 
  n 
  thai 
  tli<- 
  Normans 
  kill 
  faun 
  

  

  ler 
  of 
  lower 
  Trenton 
  age 
  or 
  directlj 
  preceded 
  or 
  succeeded 
  that 
  

   iiai 
  the 
  presence 
  of 
  such 
  genera 
  as 
  A 
  g 
  n 
  o 
  

   A. 
  eg] 
  i 
  n 
  .1 
  . 
  Bat 
  b 
  y 
  a 
  r 
  a 
  > 
  . 
  A 
  m 
  p 
  y 
  i 
  and 
  D 
  ioniide, 
  when 
  

   : 
  in 
  the 
  liuln 
  of 
  their 
  now 
  known 
  vertical 
  range 
  in 
  

   America, 
  is 
  indicative 
  of 
  an 
  older 
  than 
  Trenton 
  bnt 
  

  

  the 
  writer 
  has 
  found 
  east 
  of 
  Albany, 
  ai 
  Ryeedorph 
  hi!! 
  and 
  

   Moordener 
  kill, 
  partly 
  below 
  ii 
  rmans 
  kill 
  shales, 
  partly 
  

  

  embedded 
  in 
  them, 
  a 
  conglomerate 
  full 
  of 
  lower 
  Tren- 
  

   too 
  in 
  matrix 
  and 
  pebbles, 
  and 
  mixed 
  with 
  mi- 
  

  

  merous 
  specimens 
  of 
  A 
  m 
  p 
  y 
  x 
  and 
  R 
  e 
  m 
  o 
  j> 
  1 
  e 
  u 
  r 
  i 
  d< 
  

   And 
  in 
  Europe, 
  notably 
  in 
  Sweden 
  the 
  above 
  mentioned 
  

   id 
  into 
  and 
  above 
  horizons 
  considered 
  as 
  1mm- 
  

   \ial 
  with 
  the 
  Normans 
  kill 
  and 
  [Jtica 
  shales. 
  Agno 
  

   las 
  and 
  Ampyx 
  occur 
  in 
  the 
  Trinucleus 
  shales 
  

   Sweden, 
  A 
  m 
  p 
  y 
  i 
  tet 
  p 
  a 
  g 
  o 
  n 
  u 
  b 
  even 
  in 
  the 
  upper 
  pari 
  of 
  the 
  

   s 
  aptolite 
  shales; 
  and 
  Dionide 
  is 
  an 
  important 
  genus 
  

   of 
  the 
  Trinucleus 
  shales, 
  where 
  also 
  Aeglina 
  still 
  occurs. 
  

   I 
  h 
  v 
  u 
  r 
  a 
  s 
  is 
  still 
  well 
  represented 
  in 
  the 
  Trenton 
  of 
  Anser- 
  

   ine 
  like 
  B 
  a 
  i 
  li 
  y 
  u 
  r 
  u 
  a 
  ex 
  tans, 
  e 
  p 
  in 
  i 
  g 
  e 
  p 
  and 
  

   b 
  c 
  li 
  u 
  c 
  herl 
  i. 
  The 
  occurrence 
  of 
  th< 
  d 
  the 
  Quebec 
  

  

  a 
  s, 
  in 
  the 
  writer's 
  opinion, 
  an 
  interesting 
  prool 
  of 
  ilie 
  Euro- 
  

   d 
  and 
  Ail 
  intic 
  connections 
  of 
  the 
  Normans 
  kill 
  fauna 
  already 
  

   ed 
  bj 
  the 
  distribution 
  of 
  these 
  graptolites 
  which 
  occur 
  

   only 
  in 
  Europe 
  and 
  to 
  th< 
  - 
  of 
  the 
  Appalachian 
  region, 
  w 
  

  

  se 
  ssippi 
  valley 
  and 
  in 
  the 
  far 
  northwest, 
  etc.; 
  while 
  the 
  

  

  i 
  una 
  lias 
  all 
  the 
  characters 
  of 
  an 
  epicontinental 
  fauna, 
  

  

  ed 
  to 
  the 
  American 
  continent 
  and 
  progn 
  saively 
  developed 
  

  

  - 
  idden 
  I 
  sion 
  of 
  the 
  Bea. 
  The 
  retention 
  of 
  these 
  an- 
  

  

  i 
  trilobite 
  genera 
  in 
  the 
  graptolite 
  fades 
  of 
  the 
  Trenton 
  is 
  

  

  then 
  only 
  an 
  int< 
  stance 
  of 
  the 
  retarded 
  develo] 
  in 
  of 
  

  

  the 
  oceanic 
  fauna 
  in 
  contrast 
  to 
  the 
  j» 
  *ive 
  develo] 
  »nt 
  of 
  

  

  epicontinental 
  faunas; 
  relations 
  which 
  lately 
  have 
  been 
  so 
  

   well 
  eli 
  d 
  i..\ 
  Chamberlin 
  (59) 
  and 
  Weller 
  (60). 
  These 
  facial 
  

  

  