CONTENTS. 



Page. 



Letter of transmittal 9 



Preface 11 



Stratigraphy of the American Carboniferous 13 



Lower Carboniferous 13 



Kinderhook 13 



Osage 14 



St. Louis-Chester 14 



Upper Carboniferous 15 



Lower Coal Measures 15 



Middle Coal Measures 15 



Upper Coal Measures 15 



Permian 16 



Correlation table of the Carboniferous 17 



Classification of Paleozoic ammonoids 19 



Table of Paleozoic ammonoid genera 22 



Ammonoids of the American Carboniferous 25 



Genera represented 25 



Table of occurrence of ammonoid genera in the American Carboniferous 27 



Table of species described 28 



Descriptions of the species 31 



Bil:)liograph y 147 



Explanations of plates 151 



Index 207 



5 



