222 



DESCRIPTION. 



F. — E. sibirica Heer. 



In " Beitrage zur fossilen Flora Sibiriens und des Amurlandes " by Prof. Dr. Oswald 

 Heer, Taf. xiii, fig. 2, xiv, 1 — Mem. de VAcad. Imp. des Sciences de St. Petersbourg, 

 VII serie, Tome xxv, No. 6. 



Following is the original description : — ■ 



E. foliis lanceolatis, subfalcatis, basi in pctiolum angustatis, 16-20 mm. latis, integerrimis, nervis 

 secundariis subtilibus, approximatis, angulo acuto egredientibus, cum nervo marginali confluentibus. 



Stekt dera E. oceanica Ung. sehr nake, hat' aber in spitzeren Winkeln auslaufende Seitennerven 

 (ef. II. Tert. Helvet. iii, Taf. cliv, 14). 



Taf. XIV, Fig. 1, zeigt nur die Basis des Blattes; sic ist gegen den Stiel zu versekmalert ; die Mitte 

 des Blattes wiirde 16 Mn. Breite haben, wenn sie ganz erhalten ware. Der Sauninerv, welcher dem Rand 

 genahert ist und demselben parallel lauft, ist deutlick, in denselbcnmiinden die zaklreicken, in spitzen 

 Winkel auslaufenden Seitennerven. (Fig. l.b. vergrSssert.) Nock deutlicher ist diese Nervatur bei den 

 auf Taf. XIII, Fig. 2 a.u.6.a dargestellten Blattern. Es katten diese eine Breite von 2 Cm. und Fig. 2. a. 

 ist vorn allmalig versekmalert. Die dickt stekenden Seitennerven sind durck zaklreicke Scklingen 

 verbunden und bilden langlicke Zellen, von welcken die aussersten an den Saumnerv sick ansckkessen. 



Die Nervation stimmt sekr wokl zu Eucalyptus, ob aber das Blatt lederartig gewesen, lasst sick 

 nickt ermitteln. Grosse und Form des Blattes, wie Nervation, ist sekr aknlick bei E. floribunda 

 [E. marginata Sm. — J.H.M.]. 



Now we come to Report of the United States Geological Survey of the Terri- 

 tories, Vol. VII — " Contributions to the Fossil Flora of the Western Territories, Part II. 

 The Tertiary Flora," by Leo Lesquereux, p. 296 (1878). 



The following extracts are taken from this Report, and it will be seen that 

 Mr. Lesquereux begins with a note of doubt. He may well do so. See fig. 3, 

 Plate 225, of the present Part, which is certainly not Eucalyptus. See also ante, p. 220. 



Of tbis family (Myrtacese), of wkick a large part of tke present flora of New Holland is composed, 

 we kave only two species wkose ckaracters seem related to tkose of tke genus Eucalyptus, as represented 

 by fossil remains. Tkey do not appear, however, satisfactorily identified. 

 B. Eucalyptus Hceringiana ? Ett. Plate fix, Fig. 10. 

 E. Hceringiana Ett., Heir. loss. II., p. 84, pi. xxviii, figs. 2-25. Heer, Ilor. v. Bornst., p. 19, 



pi. iv, fig. 14. 

 E. Hwringiana ? Lesqx., Annual Report, 1872, p. 400. 

 Leaves linear-lanceolate to tke point and to tke skgktly inequilateral base ; secondary nerves 

 alternate, mostly simple, ascending to tke point, parallel to tke midrib. 



If some of tke leaves figured by tke autkor of tke " Flora of Bilin " kave tke same form and size as 

 tkese, that one represented by Heer in the " Bornstaedt Flora " differs by its characters, form and 

 nervation. I am, therefore, now more uncertain in regard to the relation of this species than when I 

 described it loc. cit., when this " Bornstaedt Flora " was still unknown to me. The nervation is somewhat 

 like tkat of Grevillea species ; for example, G. provincialis Sap. (Et., i, p. 99, pi. viii, fig. 3), and still more 

 like tkat of some Mimosa, Prosopis, &c. 



Habitat. — Black Buttes, Wyoming, in red baked skale. 



