124 TRANSACTIONS OF THE [JAN. 22, 
The region traversed was along the shore from Northville, 
near Jamesport, to Glen Cove, a distance of about fifty miles, 
following the curve of the Sound. The actual distance covered, 
however, was much greater, on account of the numerous inlets, 
which often necessitated long detours of five or ten miles in 
order to visit localities perhaps not more than a mile or so apart, 
on the extremities of the long projecting necks of land. 
The principal object in view was to ascertain, if possible, the 
limits within which cretaceous material could be found. I had 
previously traced such material from New Jersey through Staten 
Island and along the north shore of Long Island to as far east 
as Dosoris Island, in the vicinity of Glen Cove ,and the fact that 
such material was also found on Martha’s Vineyard and that 
the accompanying geological phenomena were identical through- 
out, led me to infer that similar conditions must prevail in the 
intermediate area. 
I shall begin with an account of the facts noted and follow it 
with a discussion of their significance. 
So far as the clays are concerned we may dispose of them in 
a few words. Absolutely no paleontologic evidence of their 
age was obtained, except at Glen Cove, as previously described. 
Leaf fragments have however been obtained from them at North- 
port, by Mr. Heinrich Ries, and from Cold Spring, according 
to specimens in the collection of the Long Island Historical 
Society. but they are too fragmentary to serve as criteria for the 
determination of the age of the clays in which they were found. 
The fact of their occurrence at these localities however should 
encourage further search. 
The material previously mentioned, consisting of ferruginous 
sandstones, shales, &c., scattered through the moraine, was the 
special subject to which I directed my attention, as it had here- 
tofore proved to be of the greatest value. At Northville not a 
fragment of it was found, and indeed it does not seem to enter 
to any extent into the composition of the moraine along the 
Sound shore, until, proceeding westward, the vicinity of Port 
Jefferson is reached. At this locality I found numerous frag- 
ments which were lithologically similar to the material in ques- 
tion, but they were mostly very coarse sandstones or conglom- 
erates, and I failed to find any definite plant remains in them. 
The first locality in which well defined fossil leaves began to 
appear was on Eaton’s Neck, and from thence westward they 
constantly increased in abundance, until the maximum was 
reached in the vicinity of Glen Cove. 
The general character of the moraine was also found to vary 
from place to place ina most striking manner. At Northville 
