(82) 
In outline it is almost identical with Lesquereux’s typical leaf 
from the Dakota Group, the only differences being its slightly 
smaller size and somewhat wider median lobe. It is also 
very similar to the leaf from the Bohemian Cretaceous which 
Velenovsky refers to this species, the only difference being 
the less conical lobes. With Newberry’s Amboy Clay forms 
there is a general resemblance to the more typical specimens. 
Hollick, (’97) found a small fragment in this (Clay Mar!) 
formation which he thought might be referable to this species. 
With the question of the proper generic relations of this spe- 
cies we are not here concerned. In another place* I have 
expressed doubt as to the validity of its reference to Sassafras. 
ACERACEAE. 
Acer Linn. Sp. Pl. 1054. 1753. 
There are about one hundred existing species of maples. 
The fossil species are also quite numerous, there being some 
twenty-six fossil American forms distributed as follows: Rari- 
tan 1, Island Raritan 1, Belly River 1, Laramie 5, Denver 
1, Ft. Union 3, Green River 3, Eocene 3, Miocene 8, Pleis- 
tocene 3. 
Heer records one from the Tertiary of Siberia, one from 
the Tertiary of Manchuria, three from the Island of Sacha- 
lin, two from Patoot, and five from the Tertiary of Greenland. 
Ettingshausen records maples in the Tertiary of Australia, 
Tasmania and New Zealand. 
ACER PAUCIDENTATUM Hollick. 
Acer paucidentatum Hollick, Trans. N. Y. Acad. Sci. 16: 
132. pl. 14. f. 2, 3. 1897. 
As remarked by Hollick this maple resembles several Ter- 
tiary species. Acer is only represented by fruit in the New 
Jersey Raritan, although a small leaf has been found in that 
formation on Staten Island. 
Sapinpus Linn. Sp. Pl. 367. 1753. 
Sapindus is at the present day a chiefly tropical genus of 
about ten species of Asia and America. The only existing 
* Bot. Gaz. 34: 438. 1902. 
