LETTER OF TRANSMITTAL. 
Yale University, 
New Haven,, Conn., September 19, 1899. 
. Sir: I have the honor to transmit herewith a report including" the 
following Contributions to the Geology of Maine, viz: Part 1/ The 
Paleozoic faunas of Maine, by Henry S. Williams; Part II, Geology 
of the Aroostook volcanic area of Maine, by Herbert E. Gregory; and 
Part III, List of localities of outcrops of Paleozoic and igneous rocks 
in Aroostook County examined in the years 1897 and 1898, by Henry 
S. Williams; and have to request that it be published as a bulletin of 
the Survey. 
Yours, respectfully, 
Henry 8. Williams. 
Hon. Charles D. Walcott, 
Director IT. S. Geological Survey, 
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