GEOLOGICAL SUEVEY OF THE TERRITOEIES. 287 



borders, stralglit to the point of curve. By its closely approaclied sec- 

 ondary veins this species is like Ehammis ohovatus, Lesqx., (Am. Jour. 

 Sci., vol. XLV, p. 207,) but differs by the greater thickness of these veins, 

 which more abruptly curve near the borders, and the more lanceolate 

 form of the leaves. From Ehamnus salicifolius, Lesqx., loc. cit, p. 206, 

 to which it is also comparable by its form, our leaf differs essentially 

 by its closer nervation. 



CoRNUS ACUMmATA, xTewby. One of our specimens agrees with 

 I^Tewberry's leaf as figured, (PI. xx. Fig. 3, ined.,) the secondary veins 

 only being less numerous and ascending along the borders in a less 

 acute angle. As the same differences are marked also between the 

 three specimens figured by the author, they do not authorize a specific 

 separation. The leaf seems to have been of thin texture, at least not 

 coriaceous j the medial, like the secondary veins, are comparatively nar- 

 row, not as distinctly marked as they are generally in species of this 

 genus. Another specimen of the saijie locality represents Fig. 2 of the 

 same i)late. It is broken and not as well i)reserved as the former. 



POPULUS LATIOR var. TRANSVERSA, Hecr. A leaf of the same form, 

 size, nervation, and marginal division as the one represented in Heer's 

 Fl. Ter. Helv., PI. Ivii, Fig. 6. It is also equally runcinate. 



Ficus TiLi^FOLiA, Al. Br. The specimen represents an entire leaf, 

 less the base and the x)oint. It is broadly cordate, lanceolate-pointed, 

 with entire borders, medial and lateral veins strong, these mostly oppo- 

 site, the lowest much divided by inferior branches going out at an open 

 angle from the medial nerve and then curving upward in a half circle 

 and ascending along the borders ; nervilies perpendicular to the second- 

 ary veins, strong, continuous. Though somewhat broken, the speci- 

 men represents evidently this species as figured by Heer, (Fl. Ter. 

 Helv., PI. Ixxxiii, Fig. 7.) The leaf in its broadest part is 3 inches 

 wide. 



JuGLANS RUGOSA, Lesqx. Broken specimen. 



Platanus Haydeni, (?) Xewby. Also an incomplete specimen, refera- 

 ble by its size and nervation to this species. Its base, however, is not 

 decurrent to the petiole, but merely wedge-shaped. The fragment of 

 this leaf is 6 inches long. 



Magnolia, (!) species. The middle part of a large leaf of Magnolia, 

 2J inches wide in the middle j the upper and lower part being broken. 

 The leaf is apparently broadly ovate-lanceolate, resembling by its form 

 and the direction of the secondary veins Magnolia Jnglejieldi, Heer, in 

 Fl. Arc. I, PI. xviii. Figs. 1 to 3. The medial nerve is narrow though 

 deep, the secondary veins diverging more or less under an average an- 

 gle of 30°, and at variable distance, some simple, some forking from 

 above the middle, separated here and there by thinner intermediate 

 secondary veins. 



PopULUS ARCTICA, Heer. Identical with the form figured by the 

 author in Arc. Fl. I, PI. v, Fig. 3^ the borders being merely undu- 

 late. 



LiQUiDAMBAR GRACILE, sp. nov. Leaf Comparatively small, a little 

 more than 2 inches long, broader than long, ijalmately, nearly equally 

 five-lobed ; lobes conical-pointed, separated by obtuse sinuses, the low- 

 est nearly continuous to the truncate or slightly oblique base; petiole 

 as long as the leaf. This species might be referable to the genus Acer 

 by its nervation, which resembles that of Acer dasycarpoUy Ehr. It has 

 only three primary nerves, diverging from the top of the petiole, aud 

 each of the lateral ones divides, near the middle or at a distance from 

 the base, iu two branches of equal size, which both sui)port one of the 



