127 
but said that he had not yet obtained all the data that he 
wished, in order to set forth his views fully. This he hoped 
to do at a later day, in a more formal and extended manner. 
With regard to the occurrence of the Cretaceous on Long 
Island, concerning which some discussion has been caused 
by recent criticisms on Prof. Hitchcock’s new map, Prof. 
Martin claimed that the evidence is exceedingly strong, that 
beds of that age do occupy the north-western part of Long 
Island, and probably underlie much of it. Prof. Hitchcock 
is right in so representing it; and the criticism made against 
him in that respect cannot stand. Reference was then made 
to the positive identification of the Cretaceous on Long 
Island, by Prof. Mather years ago in his report (Geol. N. Y., 
vol. 1, chap. iv), and to a number of facts mentioned by recent 
observers. Especially important is the sandstone with 
angiospermous leaves, a mass of which was found in digging 
the foundations of the Williamsburg Gas House, some three 
years ago. 
Pror. STEVENSON expressed his concurrence with the 
views of the last speaker on these points, and recalled the 
the fact of the finding of Gryphea in a well-excavation, many 
years since, in the northern part of Long Island. | 
THE PRESIDENT described a sandstone containing angio- 
spermous leaves, very similar in aspect to those of the 
Raritan and of the Lower Cretaceous in the far West, which 
occurs in boulders at Lloyd’s Neck, L. L. This is undoubt- 
edly the same rock with that of the Williamsburg Gas House, 
as he was satisfied from comparison. It is totally unlike 
anything known in this vicinity, and, unfortunately, has not 
yet been found im situ. Whenever it is, some interesting 
light will be thrown on this whole question. But its pres- 
ence under these circumstances, points to its existence in 
place, at some locality not far away. 
