DESCEIPTION OF SPECIES— MORE^. . 203 



to a point, a character wliicli is not, however, ascertained, the point of all 

 the specimens being destroyed. Nor can I take into consideration the 

 petiole, of which I find no fragment. Hence, though great the affinity 

 appears to be, these leaves may represent anotlier species, even be referable 

 to another genus. The Flora of Sdzanne has, under the name of Slerculla 

 variabilis, Sap. (p. 409, pi. xii, figs. 6 and 7), two leaves which resemble those 

 figured here by the shape and the principal nervation. They differ, however, 

 by the distribution of the lateral veins, which do not reach close to the 

 . borders, but follow them in double festoons. 

 Habitat. — Golden, Colorado. 



Ficus tiliiefolia, Al. Br. 



Plate XXXII, Figs. l,2,2o,3; Plate LXIII, Fig. 8. 



Flcus tiXimfoUa, Heer, Fl. Tort. Helv., ii, p. 68, pi. Ixsxiii, figs. 3-12 ; Ixxxiv, figs. 1-G ; Ixxxv, fig. 14 ; iii, 

 p. 133, pi. cxlii, fig. 25; clii, fig. 14. — Uug., Sillog., i, p. 14, pi. vi.fig. 2. — Sisiii., Mater., p. 

 436, pi. xvii, fig. 5.— Elt., Foss. Fl. v.Bil., p. 80,pl. xxv.figs. 4,5, 10(?).-Heer, Mioc. B.alt., 

 Fl., p. 74, pi. xxi, fig. 12. — Gaud. & Strozzi, Feuillcs Foss., p. 34, pi. xii, fig. 11. — Sclip., 

 Pal. V^g^t., ii, p. 746. — Lesqx., Annual Report, 1871, pp. 287, 298, 299; Supplement, pp. 12, 

 16 ; Annual Reports, 1872, pp. 375, 393 ; 1873, p. 399 ; 1874, p. 304. 



TiUa mutabilis, Goepp., Palajout., ii, pi. xxxvii, fig. 1. 



Tilia prisca, Al. Br. in Ung., Synops., p. 234. 



Cordiat tilicefoUa, Al. Br. in Bronn., Jabrb., 184."), pt 170. 



Jeer Beckerianum, Goepp., Palreont., ii, p. 279, pi. xxxvii, fig. 2 c. 



Dombeyopsis tiliwfolia, Ung., Gen. et Sp., p. 447 ; Foss. Fl. v. Sofzka, p. 45, pi. xxv, figs. 1-5. — Goepp., 

 loo. cit., pi. xxxvi, fig. 3 (?). 



Dombeyopsis grandifulia, Ung., Gen. et Sp., p. 447; Foss. Fl. v. Sotzka. pi. xxvi, figs. 1,2. — Goepp., loc. 

 cit., p.22, pi. V, fig. 2 6. 



Dombeynpnis aidafoJia, Ung., Gen. et Sp., p. 448. 



Dombeyopsis lobataf, Ung., loc. cit., p. 447. 



Dombeyopsis aqualifoliaf, Goepp., Palaiont., p. 278, pi. xxxvi, fig. 4, xxxvii, fig. 2 a. — Lesqx., Supplement 

 to Annual Report, 1871, p. 10. 



Leaves of various sizes, generally very large, coriaceous, entire, broadly oval or nearly round, 

 sligbtly abruptly pointed, more or less iuequilateral and cordate at the base; nervation tbick, coarse, 

 camptodrome. 



The species described under so many different names in most of the Euro- 

 pean Tertiary floras is as widely represented in the Tertiary formations of North 

 America, and also as very variable, if not in its characters, at least in the size 

 of the leaves, as it is in Europe. Most of the specimens representing it from 

 the Lower Lignitic of the Rocky Mountains arc fragments of very large leaves, 

 like those figured in our plates, none of them being found in the whole.* In 



* I bave lately received, by a coinniunicution from Mr. George Haddeu, from Coal Creek, Ci>l()rad(),a 

 fine specimen of tbi.s species, represenling a wbole leaf, except tbe mere point. It is more tban fourteen 

 centimeters long, eleven centimeters broad, cordate and inequilateral at tbe base, witli a .sbort, tbick 

 petiole, enlarging downward, two aud a half millimeters tbick at the base of tbe leaf, and four millime- 

 ters at tbe point where it is broken two centimeters below its point of attachment. It has all tbe char- 

 acters of the species: form of leaf nearly round, uervatiou, rough surface, etc. 



