1893. ] NEW YORK ACADEMY OF SCIENCES. 229 
The character of the rock was not understood at the time, 
however, and it was not until a few years subsequently, when 
specimens were found in sifu, in connection with the clays at 
Glen Cove, a locality between the other two, that their deriva- 
tion was understood. 
On April 4, 1881, N. L. Britton read a paper before the 
Academy “On the Geology of Richmond County, N. Y.,’* in 
which the probable eastward extension of the cretaceous strata 
through Staten and Long Island is mentioned, and on 
November 7, 1884, Fredk, J. H. Merrill read a paper before 
the Academy on the geology of Long Islandt, in which he 
maintains a very conservative attitude in regard to the cretaceous 
formation. The Hxrogyra previously mentioned is referred to, 
and also the leaf-bearing sandstone, but the evidence is 
considered as too incomplete, and he merely concludes that 
“The locality at which the strata most resemble the cretaceous 
beds of New Jersey is at Glen Cove, where the clays already 
described are probably of this age.’’ 
Just previous to this time J.S. Newberry began his studies 
of the Amboy clay flora, and shortly afterwards, his views were 
briefly presented before the New York Academy of Sciences{ 
and the Torrey Botanical Club§. Dr. Newberry was the first 
to correlate these clays with the Dakota group of the west and 
the Lower Atane beds of Greenland, by means of their fossil 
floras, and his researches in this direction also enabled him to at 
once identify the fossil leaves collected about the same time at 
Glen Cove as identical with those from the Amboy clays, and 
thus to fix without question the cretaceous age of the strata, 
and similar further work in the same direction was subsequently 
performed by R. P. Whitfield for the fauna||. 
At a meeting of the New York Academy of Sciences, on May 
11, 1885, Fredk. J. H. Merrill gave a description of the beds at 
Gay Head, Martha’s Vineyard, and referred them to the post 
pliocene or quaternary. 
In 1888, a report upon the geology of Martha’s Vineyard** 
appeared, by N.S. Shaler, and in the following year one upon 
* Ann. N. Y. Acad. Sci. ii. 161-182 (1882). 
t Ann. N. Y. Acad. Sci. iii. 341-364 (1885). 
+ Trans. N. Y- Acad. Sci. v. 133-137 (1886). 
§ Bull. Torr. Bot. Club, xiii. 33-37 (1886). 
| Bull. Am. Mus. Nat. His. ii. Art. viii. 113-116 (1889). 
7 Trans. N. Y. Acad. Sci. iv. 78, 79 (1885). 
** 7th Ann. Rept. U.S. G. 8. 297-363 (1888). 
