166 TRANSACTIONS OF THE [maR. 19, 
fossils thus far found are some small elliptical leaves, presumably 
those of a water plant, discovered in the blue clay behind the 
Medical College in Albany.* 
On Staten Island an abundance of plant and mollusecan re- 
mains have been discovered and described by Mr. Arthur Hol- 
lick; they all confirm the cretaceous age of these deposits.+ 
A list of fossils found in the Long Island clays up to 1884 
has been given by Dr. Merrill in his paper on the Geology of 
Long Island. Since then a number of cretaceous plant remains 
imbedded in concretions have been found along the north shore 
of the island between Glen Cove and Northport, but they have 
been found in the clay only at the former locality. The writer 
has found leaves [referable to Eucalyptus] in the clays at 
Northport, and in the summer of 1892 yellow gravel fossils were 
discovered by him at Cold Spring. { Additional specimens were 
noted the following Summer by Mr. Hollick. 
Several years ago while making an examination of the Hud- 
son River clays I searched very carefully for fossils, but the 
only things met were some regular markings which Prof. James 
Hail declared to be worm-tracks. This absence of organic re- 
mains seemed rather unexplainable when we consider the abund- 
ance of fossils found in the estuary deposits of the Champlain 
Valley, which are of the same age. 
In order to make my search complete specimens of the clay 
from many localities between New York and Albany were exam- 
ined microscopically, and in those from Croton Point were 
found a number of sponge spicules shown in PI, III., Fig. 1-13. 
They are probably referable to Hyalonema or some closely 
allied genus. The following diatoms, all fresh water species, 
and known to occur at the present day were also discovered in 
this clay. 
Navicula Gruendleri, A. 8. Pl. III., Fig. 15. 
Navicula permagna, Edw. [fragments ]}. PIS rises: 
Melosira granulata {Ehr.] Ralfs. Pl. IIL, Fig. as 
Nitzschia granulata, Grun. PI. III., Fig. 25. 
Figs. 17, 21, 22,23 and 24 are fragments found in the clay from 
Verplank. Fig. 22 is of a yellowish color and resembles the 
scale of an insect. 
In the Champlain clay at Plattsburg one species of diatom 
belonging to the genus Diatoma was noted. PI. III., Fig. 16. 
The Long Island clays were next examined with interesting 
results. At Wyandance is a bed of black clay overlain by a 
*Mather. Geol. lst Dist., N. Y., 1843, p. 125. 
+ Trans. N. Y. Acad. Sci., Vol. XI., No. 5, & Vol. XII. 
tTrans. N. Y. Acad. Sci., Vol. XII. December, 1892. 
