156 Association of American G'eologists and Naturalists. 
leaving permanent memorials of the fact. As among the species 
of fossils, (perhaps not more than twenty in number,) collected by 
Mr. N. four proved to be identical with those of the Atlantic cre- 
taceous formation, and as it was probable that future researches 
would show a greater conformity of fossils, we had exhibited be- 
fore us one vast formation, the extremes of which were apparently 
identical in date, and the deposit of one great sea. This became 
the more interesting from the difference which existed between 
it and that of Europe, as among two hundred species of fossils 
which had been found in cretaceous formations of the Atlantic, 
but one, and that even doubtful, has as yet been identified with 
an Huropean species. The evidence appears strong, that the 
fauna of the formation on the two continents was dissimilar, and 
that there was a general identity of the fauna in America, as 
shown by a comparison, by Dr. Morton, of the cretaceous fossils 
of New Jersey with those of Upper Missouri. The Atlantic fos- 
sils corresponding with those of the Upper Missouri, as far as 
observed, are as follows: Ammonites placenta, (Dekay,) some 
very large, also found in New Jersey ; A. Conradi, (Morton,) in 
Alabama; Baculites ovatus, (Say,) in New Jersey; Belemmnites 
mucronatus, found in New Jersey, Alabama, and English chalk. 
Mr. Redfield mentioned the occurrence of a cretaceous fossil, 
the H'xogyra costata, (Say,) in the city of Brooklyn, opposite the 
city of New York. It was found about sixty five feet below the 
surface, in excavating a well in or through the drift on Brooklyn 
heights. ‘This is believed to be the first authentic memorial of 
the cretaceous formation found in the state of New York. The 
specimen, a very fine one, is in the cabinet of Dr. John C. Gay. 
The Chair stated, that the Association was without a treasurer, 
Dr. Locke having been detained from attending the present meet- 
ing. Dr. Douglass Houghton, of Detroit, was then elected to 
the office; and the accounts and funds of the Association were 
handed to Dr. H. by the Secretary. 
The Secretary then presented to the Association a collection of 
corals and coral rocks from the West Indies, received last year 
from Mr. Peter A. Brown, of Philadelphia. 
The Chairman remarked, that as it was understood that the 
Secretary was engaged in a series of chemical examinations on 
the corals and coral limestones of the Pacific, it might be inter- 
esting to make some comparison also with those of the West In- 
