TABLE OF CONTENTS. 



Letter of Transmittal by the STATE GEOLOGIST. 



Letter of PRESIDENT JOHN S. PILLSBUHY of the Board of Regents. 



INTRODUCTION. 



Historical sketch of investigation of the Lower Silurian in the Upper Mississippi Valley. Page. 



By N. H. WINCHELL and E. O. ULRicn ix to liii 



CHAPTER I. 



Cretaceous fossil plants from Minnesota. By IEO LESQUEREUX 1 to 22 



CHAPTER II. 



The microscopical fauna of the Cretaceous in Minnesota, with additions from Nebraska and 



Illinois. By ANTHONY WOODWARD and BENJAMIN W. THOMAS 23 to 52 



Note on other Cretaceous fossils in Minnesota. By N. H. WINCHELL 53 to 55 



CHAPTER III. 



Sponges, Graptolites and Corals from the Lower Silurian in Minnesota. By N. H. WINCHELL 



and CHARLES SCHUCHERT 55 to 59 



CHAPTER IV. 



On Lower Silurian Bryozoa of Minnesota. By E. O. ULRICH 96 to 332 



CHAPTER V. 



The Lower Silurian Brachiopoda of Minnesota. By N. H. WINCHELL and CHARLES SCHUCHERT. 333 to 474 

 Index Ivii to Ixxv 



LIST OF THE PLATES AND THEIR ORDER. 



Map showing the area of the Lower Silurian Frontispiece 



Plates A and B, Cretaceous Flora After page 22 



Plates C, D, E. Cretaceous Foraminifera After page 52 



Plates F, G. Sponges, Graptolites and Corals After plate E 



Plates 1-28. Bryozoa After page 332 



Plates 29-34. Brachiopoda After page 474 



[NOTE. Each plate is accompanied by a full description]. 



816^621 



