12 
PREFACE. 
The collections from Somerset County were made for the Survey in 
1889 by Mr. Gilbert Van Ingen under my direction. Several collections 
of fossils, including the fine one from Square Lake, were made by Mr. 
Olaf O. Ny lander, and secured for the Survey. 
Fig. 1.— index map showing the locations aescriDed m tnis report. The larger shaded area on i he 
rigid is the Aroostook County area referred to in Parts I, II, and III. The small black rectangle in 
1st of the shaded area is the volcanic district reported upon in Part II. The smaller shaded 
area on the left side is the Somerset County area. 
All the fossils have been examined by me personally, and the report 
on the faunas (Part I) constitutes a preliminary report on the geologic 
results of such study. Many of the species are new species or varietal 
