CONTENTS 



Page 



Proceedings of the Thirty-first Annual Meeting of the Geological 

 Society of America, held at Baltimore, Maryland, December 

 2 7 and 28, 191 8. Edmund Otis Hovey, Secretary - - 1-118 



Officers, Correspondents, and Fellows of the Society - - - - 1 19-130 



Constitution, By-Laws, and Publication Rules of the Society - - 131-142 



Proceedings of the Tenth Annual Meeting of the Paleontological 

 Society, held at Baltimore, Maryland, December 28, 1918. 

 R. S. Bassler, Secretary 143-164 



Geology in the World War and After. Presidential Address by 



Whitman Cross 165-188 



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