THE FAUNAS OF THE HAMILTON GROUP 



OF 



Eighteen-Mile Creek and Vicinity. 



By Amadeus W. Grabau. 



Introduction. 



The investigations on which this paper is based, were begun in the early 

 summer of 1895, and continued with more or less interruption to the present 

 date. Several months of field-work during the summers of 1895 and 1896 

 furnished the necessary material and data for study during the succeeding 

 winters. These studies were carried on in the geological laboratory of the 

 Massachusetts Institute of Technology, where the greater portion of the 

 collections was deposited.* The works most frequently consulted in the 

 preparation of this paper, were those of Professors James Hall, John M. 

 Clarke and H. S. Williams. To the writings of Professors Clarke and 

 Williams, I am especially indebted for suggestions of methods of work, etc. 

 Other acknowledgments are made in the text. 



In the field I have had the constant assistance of Mr. P. L. Grabau, and 

 for advice and suggestions I am indebted to Professors Alpheus Hyatt, 

 W. O. Crosby and W. H. Niles. 



* This paper was originally presented to the Faculty of the Massachusetts, Institute of Technology, as a thesis for the 

 degree of Bachelor of Science in the Department of Geology, May, 1896. It was subsequently enlarged, and read at the 

 Buffalo meeting of Section E, of the American Association for the Advancement of Science, August, 1896. 



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