1894. } NEW YORK ACADEMY OF SCIENCES. 129 
Long Island. Such we have seen to be the case, and the grad- 
ual disappearance of the fossils eastward is exactly what might 
be expected. The composition of the gravel changes from 
Devonian and Silurian pebbles to pebbles. of the older erystal- 
line rocks, such as are represented in Southern New Y ork and 
New England. 
The only weak point in the hypothesis is the almost total 
absence of any triassic pebbles in the gravel. If its origin was 
from the paleeozoic and crystalline rocks of New York and New 
England, it must have crossed the triassic area in order to reach 
its present position, and the absence of triassic material in its 
composition yet needs a satisfactory explanation, especially as 
well defined deposits of ‘‘ yellow gravel” are to be found in New 
Jersey right up to and extending for some distance into the 
triassic area. 
Every new fact recorded is, therefore, of importance, and de- 
finite proof that the yellow gravel” is represented on Long 
Island is of value in itself, irrespective of the extent of its dis. 
tribution there, inasmuch as its identity with the ‘ yellow 
gravel” of New Jersey has been questioned, mostly because of 
the previous absence of just such evidence. Personally I think 
that there is no doubt of the identity of the “yellow gravel” 
throughout Long Island, even where it does not contain the 
characteristic paleeozoic fossils. The conditions under which it 
occurs are identical, and I am even inclined to refer some of the 
gravels on Martha’s Vineyard to the same horizon. The entire 
subject, however, is under investigation by me at the present 
time, and will probably form the basis for a separate contribu- 
tion in the future. 
In conclusion, I have decided to append a list of the creta- 
ceous plants thus far described from the island, together with a 
table of distribution. 
An analysis of the 50 species determined shows that 7 have 
been found on Staten Island, 22 in New Jersey, 4 on Martha’s 
Vineyard, 23 in the Dakota group and 1 in the Laramie group 
of the West, 16 in the Lower Atane and 7 in the Patoot beds of 
Greenland, while 4 are reported from Gelinden and 3 from 
Moletein, in Europe. Further than this I have not carried the 
distribution. 
With the small amount of material at present available it is 
not safe as yet to draw any positive conclusion, but the com- 
parison at least serves to closely correlate the Long Island cre- 
taceous with the Amboy clays of New Jersey, “the Dakota 
group of the West and the Lower Atane beds of Greenland. 
Transactions N Y. Acap. Sci, Vol. XIILI., Sig. 9, March 20, 1894. 
