CONTENTS OF VOL, 1. 
Paces. 
PREFACE, ix — xiv 
INTRODUCTION, Ae An a Ag a XV —Xxiv 
Organic Remains of the Potsdam sandstone, .. th 1- 4 
== == Calciferous sandstone, .. ae 6- 13 
— — Chazy limestone, a a 14 - 36 
_ — Birdseye limestone, .. = 37 — 46 
— — Black-river limestone, .. ts 46 - 60 
— — Trenton limestone, a ae 60 — 249 
_— — Utica slate and Hudson-river group, 250 - 314 
Additions and Corrections, ae - - o 315 - 318 
Organic Remains of the Taconic system, sp .. 3819 - 320 
Tabular List of Species, 321 - 333 
List of Plates, 334 -— 3388 
