THE principal part of these remarks were made at the meetings 
of the Boston Society oF Naturat History. A portion of 
them also have been printed in the Proceedings of the Society. 
The object of this publication is to afford to those who are not 
members of the Society an opportunity of obtaining some know- 
ledge of Fossil Impressions, which they might not be able to 
obtain elsewhere so conveniently. 
Some account of the Epyornis seems to be very properly con- 
nected with Ornithichnites. 
The first of these papers was written in October, 1853; the 
others in the earlier part of the present year. 
