(85) 
closely, for instance, Fl. Amboy Clays, f/. 49. f. ro. 
Our leaf is also somewhat similar to some of the Amboy clay 
leaves which Newberry refers to C. crenatum Heer, though 
the latter is stouter and averages much larger. 
. grandifolium Newb. is of somewhat the same propor- 
tions but about three times as large. The Dakota species 
except C. decurrens are much smaller leaves. The Potomac 
species are mostly smaller broader leaves of rather obscure 
affinities. 
CELASTROPHYLLUM NEWBERRYANUM Hollick. 
Celastrophyllum Newberryanum Hollick ; Newb. Fl. Am- 
boy Clays, ror. pl. 49. f. 1-27. 1896; Trans. N. Y. 
Acad. Sci. 16: 133. pl. 14. fi tr. 1897. 
This small-leaved Celastrophyllum is abundant in the 
upper Raritan beds at South Amboy and we would naturally 
expect it to extend upward into the Cliffwood beds, where it 
is recorded by Hollick. 
RHAMNACEAE. 
Ruamnus Linn. Sp. Pl. 193. 1753. 
About seventy-five existing species, mostly north temper- 
ate, a few tropical and a few south temperate; eleven inhabit 
North America. Thirty-three species are found fossil on 
this continent in the following formations: Island Raritan 
2, Dakota 6, Montana 1, Laramie 10, Denver 6, Ft. Union 
2, Green River 3, Eolignitic 2, Tertiary 1 
Heer records one from the Tertiary of Manchuria, one 
from the island of Sachalin, two from Atane, one from Patoot, 
and eight from the Tertiary of Greenland. 
Rhamnus Novae-Caesareae sp. nov. I. 50. f. 5,6 
These leaves are somewhat similar in outline and venation 
to what Hollick calls Quercus (?) Movae-Caesareae from this 
same locality, only our specimens are less perfect and consid- 
erably larger. Their true affinity seems to be with Ahamnus, 
and I have been unable to associate them with any of the 
