214 UNITED STATES GEOLOGICAL SURVEY— TERTIARY FLORA. 



having larger leaves, more obtuse at the basje, less distinctly acuminate, than 

 any of those referred to L. pri?nigenia. It is well to remark that all the 

 specimens represented in tigs. 1-8 are from the same locality, found mixed 

 too-ether, sometimes plentifully, upon the same piece of shale. The large 

 leaves, however (tigs. 1 and 2), are rare; those like figs. 5 and G are the most 

 abundant. In all, the arenlation is generally obsolete, remarked only upon 

 fragments whose epidermis has been destroyed by maceration. 



The fruit (fig. 4«) is, with others of the same character, found mixed 

 with the leaves; it represents evidently the drupe of a Laurus, most proba- 

 bly of this or of the following species. .By its globular form, it is similar to 

 that of the present North American Pcrsea Carol! nensis. It is surrounded 

 by a thin, shelly, or coriaceous pericarp, which is easily separated in fragments, 

 as marked upon the figure. 



Habitat. — Evanston, Wyoming; in the shale, below the main coal. 



Laurus priuiigenia. Ung. 

 Plate XXXVI, Figs. 5, G, 8. 



Lam-US primigenia, Ung., Foss. Fl. v. Sotzka, p. 38, pi. xis, figs. 1-4.— Heer, Fl. Tert. Helv., ii, p. 77, pi. 



ixxxix, tig. l.'j; lii, p. lfi4, pi. cxlvii, fig. 10 e; <li i, fig. 3.— Sap., fit., i, p. 210, pi. vi, fig. 



5 ; ii, p. 89, pi. iii, fig. 8 ; iii, p. T.'j. — Ung., Foes. Fl. v. Kumi, pi. %iii, figs. 1-7. — Ileer, Sachs. 



Tbur. Biaunk., p. 7, pi. vi. — Elt., Alt. Brauok. d. Wetter., p. 44. — Lesqx., Annual Report, 



1872, p. 406. 

 Laurus phaboides, Ett., Tert. Fl. v. Vien., p. 17, pi. iii, fig. 3. 

 Laurus obovalaf, Lesqx., Annual Report, 1872, p. 399. 



Leaves subcoriaceous, narrowly lanceolate, acuminate; lateral nerves slender, open, distinctly 

 curving in passing to the undulate borders. 



The first specimens referable to this species, found six miles above 

 Spring Canon, were very obscure, mere fragments, which did not afford any 

 satisfactory evidence for identification or description. These were referred, 

 with an imperfect specimen from Black Buttes, to this species and to Laurus 

 obovata, Web. (Palseont., viii, pi. iii, fig. 4). Since then, I have had opportu- 

 nity to examine more satisfactorily these leaves by the comparison of a large 

 number of specimens at Evanston, but have been unable to positively recall 

 to the same species the fragments from Spring Canon and Black Buttes; they 

 have been omitted as too unreliable. The difference of the characters of this 

 species from those of the farmer is especially in the narrowly lanceolate, more 

 distinctly acuminate, and narrowly cuneate shape of the leaves. The nerva- 

 tion and areolation are of the same character. 



Habitat. — Evanston, Wyoming; first collected by Dr. A. C. Peak. 



