(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 Marl) 

 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. PI. 1054. ^753- 

 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 I, Island Raritan i, Belly River i, Laramie 5, Denver 

 I, 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 ^aucidentatum Hollick, Trans. N. Y. Acad. Sci. 16: 

 132.//. 14../. 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. 



Sapindus Linn. Sp. PI. 367. 1753. 

 Saf Indus 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. 



