FLOE A OF THE GREEN RIVER GROUP. 177 



dentate, the teeth shorter and more obtuse. Saporta compares his species to 

 A nil in elegans of New Grenada, a plant cultivated in gardens, which from 

 the figure given by the author seems like a counterpart of the fossil leaf. 

 Hah. — Florissant. This splendid specimen is in the Princeton 

 Museum, No. 659. 



HEDERA, Linn. 



Heilera margiiiata, ep. nov. 



Plate XL, Fig. 8. 



Leaf small, coriaceous, nearly round in outline, truncate at base, deeply sharply 

 lobate all around ; nervation five-palmate from the base, the nerves directed toward 

 the points of the lobes, united by nervilles at right angles. 



I know nothing to which this leaf may be related. In shape and 

 nervation it seems a species of Hedera comparable by these characters to 

 II. prisca, Sap., "Sez. FL," p. 380, pi. x, fig. 1, which, however, is a large 

 leaf with short obtuse teeth. 



Hah.— Florissant. U. S. Geol. Expl. Dr. F. V. Hayden. 



AMPELIDE^E. 



CISSUS, Linn. 

 Cissus parrotiaefolia, Lesqx. 

 "U. S. Geol. Rep.," vii, p. 239, pi. xl, figs. 15-17. 



AMPELOPSIS, Mich. 

 Ibid., p. 242. 



Ainpelopsis tertiaria, Lesqx. 

 Ibid., p. 242, pi. xliii, fig. 1. 



SAXIFRAGES. 



WEINMANNIA, Linn. 



Leaves simple, ternate, quinate or odd-pinnate; petiole articulate; racbis often 

 alate, rarely entire ; secondary nerves thin, camptodrome or craspedodrome. 



The leaves which I refer to this genus have been referred by authors 

 either to Zanthoxylum or Celastrus, or especially to Rhus, as I have done 

 in vol. vii. Fine figures of species of Weinmannia from specimens obtained 

 by Rev. Probst from the Tertiary of Biberack, and communicated to me 

 by Heer, show such a close relation to the leaves described from Floris- 

 sant that their reference to the same genus cannot be doubted. 



C F 12 



