lesquereux.] FOSSIL PLANTS FEOM POINT OF ROCKS. 303 



(Miocene?) of Provence, described by Saporta, may be therefore more 

 intimate than it appears from the comparison of a single leaf. Our 

 species is also comparable to Populus heliadum, Ung., by its form, and 

 to P. melanaria, Heer, by its nervation. 

 Habitat. — Point of Bocks, Wm. Clebum. 



17. FlOTJS ASARIFOLIA, Ett. 



Leaves petioled, broadly reniform, subcordate or subpeltate, very 

 obtuse, small, with borders crenulate ; primary nerves palmately five 

 to seven ; middle nerve straight ; upper lateral ones strong, curving 

 inward, branching and anastomosing with the upper secondary veins ; 

 veinlets transversal, their ramification forming a protuberant, or em- 

 bossed, very distinct, polygonal areolation. 



Though this species has been already briefly described from speci- 

 mens found at Golden, in Dr. F. V. Hay den's report for 1872 (p. 378), it 

 had as yet not been figured, the fragments of leaves being generally 

 too incomplete. It is, however, easily recognized by its peculiar nerva- 

 tion, forming small, elevated, polygonal areolae, an areolation like an 

 embossed checker-board, resembling that of Asarum, Europeum. The 

 fragments of Golden seem to be part of much larger leaves than those 

 of Ettinghausen, who described the species in Bilin Flora (p. 80, PI. 

 XXV, figs. 2-3). These per contra, from specimens of Point of Bocks, 

 are perfectly well and entirely preserved leaves, rather smaller, except 

 one, than the leaves of Bilin. They are also slightly more expanded 

 on the sides, or reniform, and the crenulations less distinct, but these 

 border-divisions are, for their size, related to the areolation, which is 

 wider in proportion of the size of the leaves. Our leaves, also, are 

 evidently peltate, at least in two of the figured specimens. One only 

 has the position of the thick petiole marked similarly to that of the 

 European leaves ; but even the representation of the species by the au- 

 thor seems to indicate peltate leaves, whose borders are erased at the 

 base or at the point of attachment of the petiole. The differences are 

 too unimportant to be considered as specific characters. These leaves 

 merely represent a local variety, or a var. minor. This species appears 

 to be rare in the Tertiary of Europe, as it has till now been seen only 

 in the plastic clay-beds of Bilin. 



Habitat. — Point of Eocks, Br. F. V. Hoyden, Wm. Clebum. 



18. Ficus Dalmatica, Ett. 



Leaves narrowly ovate, obtusely pointed, narrowed to a short petiole; 

 middle nerve thick toward the base, thinning upward ; basilar lateral 

 nerves, from above the border-base of the leaves, thin, ascending at an 

 acute angle of divergence of thirty degrees to the middle of the leaf; 

 secondary veins more open, equidistant ; nervation camptodrome, joined 

 by transverse nervilles. 



In considering the figure by the author in Flora Promina (PI. VII, fig. 

 11), there is no difference whatever between the European form and 

 ours; but the description says that the secondary veins are branching 

 at the point, and there is no trace of divisions of veins observable upon 

 our specimens. As, however, the figured single leaf shows merely trans- 

 verse nervilles and not real branches, and as these nervilles are also 

 visible on the American form, it is apparently identical. One of the 

 leaves represented in our plate seems rounded at the base. This is 

 caused by its reversement into the stone, the upper part cf the leaf be- 

 ing flat and the lower curved down in entering the stone where the 

 extreme base and petiole are imbedded. 



Habitat.— Point of Eocks, Dr. F. V. Hayden. 



