﻿62 
  PALAEONTOLOGY. 
  

  

  Besides 
  the 
  magnificent 
  collections 
  of 
  Mr. 
  Frank 
  Springer 
  and 
  Mr. 
  

   W. 
  ('. 
  Van 
  Borne, 
  in 
  t 
  lie 
  use 
  of 
  which 
  we 
  have 
  enjoyed 
  unrestricted 
  

   liberties, 
  we 
  are 
  indebted 
  for 
  valuable 
  aids, 
  which 
  are 
  duly 
  acknow- 
  

   1 
  at 
  the 
  proper 
  place 
  iu 
  the 
  accompanying 
  text. 
  Through 
  

   curtesy 
  of 
  Dr. 
  Charles 
  A. 
  White, 
  paleontologist 
  of 
  the 
  I 
  

   Geological 
  Burvey, 
  we 
  have 
  had 
  access 
  to 
  the 
  collections 
  of 
  the 
  

   National 
  Museum, 
  which 
  have 
  been 
  brought 
  in 
  by 
  Government 
  

   petitions 
  to 
  the 
  Territories. 
  We 
  arc 
  also 
  under 
  great 
  obligations 
  to 
  

   Dr. 
  Joseph 
  Leidy, 
  who 
  kindly 
  procured 
  us 
  the 
  loan 
  of 
  valuable 
  

   types 
  belonging 
  to 
  the 
  Museum 
  of 
  the 
  Academy 
  of 
  Natural 
  Bciencs 
  

   of 
  Philadelphia. 
  It 
  affords 
  us 
  pleasure 
  in 
  rendering 
  acknowledg- 
  

   ments 
  and 
  our 
  thanks 
  to 
  Lord 
  Enniskillen 
  and 
  Dr. 
  1.. 
  de 
  Koninck, 
  

   for 
  valuable 
  information 
  in 
  relation 
  to 
  the 
  occurrences 
  of 
  Carbon' 
  

   iferous 
  fishes 
  in 
  Great 
  Britain 
  and 
  Belgium. 
  We 
  air 
  also 
  specially 
  

   indebted 
  to 
  Mr. 
  Charles 
  Wachsmuth, 
  who 
  has 
  favored 
  us 
  with 
  much 
  

   additional 
  material 
  from 
  the 
  Kinderhook 
  and 
  Burlington 
  formations. 
  

   Similar 
  favors 
  have 
  also 
  been 
  extended 
  us 
  by 
  Mr. 
  L. 
  A. 
  ( 
  

   Keokuk. 
  Mr. 
  Alexander 
  Butters, 
  formerly 
  of 
  Carliuville, 
  and 
  Mr. 
  

   Georgi 
  Bambach, 
  of 
  St. 
  Louis. 
  We 
  have 
  also 
  had 
  the 
  use 
  of 
  Mr. 
  

  

  L. 
  A. 
  Fuller's 
  collection, 
  and 
  Mr. 
  A. 
  s. 
  Tiffany, 
  of 
  Davenport, 
  has 
  

  

  placed 
  in 
  our 
  hands 
  some 
  very 
  interesting 
  material 
  from 
  various 
  

  

  Carboniferous 
  ami 
  Devonian 
  formations. 
  Professor 
  I. 
  ('. 
  Win- 
  

  

  the 
  Pennsylvania 
  Geological 
  Survey, 
  has 
  kindly 
  furnished 
  us 
  material 
  

  

  from 
  the 
  Lower 
  Carboniferous 
  fish-horizons, 
  which 
  he 
  has 
  discos 
  

   m 
  Western 
  Pennsylvania; 
  hut 
  these 
  last, 
  i 
  t, 
  we 
  bav< 
  

  

  c-im)n 
  lied 
  to 
  omit 
  in 
  the 
  present 
  work. 
  

  

  O. 
  St. 
  .1. 
  and 
  \. 
  II. 
  W. 
  

  

  