CONTENTS. 
Page. 
Letter of transmittal 9 
Preface, by Henry S. Williams 11 
Part I. The Paleozoic faunas of Maine: a preliminary report upon the Paleo- 
zoic faunas already known and upon new faunas recently collected 
fr< >m Aroostook County, by Henry S. Williams 15 
Part II. Geology of the Aroostook volcanic area of Maine, including an account 
of the clastic rocks of Aroostook County, by Herbert E. Gregory.. 93 
Part 111. List of localities of Paleozoic, igneous, and other crystalline rocks 
examined during the seasons of 1897 and 1898, by Henry S. 
Williams 189 
Index 205 
