TABLE OF CONTENTS 



Table of Contents iii-iv 



Letter of Transmittal v-xi 



PART I. GEOLOGY. 



CHAPTER I. 

 Drift Deposits of Illinois, A. H. WORTHEX 1-24 



CHAPTER II. 



Economical Geology (Coal: Natural Gas and Oil; Artesian 

 Water), A. H. WORTHEX 25-67 



PART II. PAL.EOXTOLOGY. 



SECTIOX I. 

 Description of Fossil Invertebrates. A. H. WORTHEX (>9-154 



SECTIOX II. 



New species of Crinoids and Blastoids from the Kinder- 

 hook group of the Lower Carboniferous Rocks at Le- 

 Grand, Iowa: and A new genus from the Niagara group 

 of Western Tennessee, CHARLES WACHSMUTH and FRAXK 

 SPRIXGER 155-208 



SECTIOX III. 

 American Palaeozoic Sponges, E. O. ULRICH 209-241 



SECTIOX IV. 



Sponges of the Devonian and Carboniferous Systems. E. 

 O. ULRICH... ...243-251 



