GEOLOGICAL SURVEY OF THE TERRITORIES. 9 



to tlie borders. The leaves, wliich I tliiuk referable to this species, are 

 like Fig. 9, loc. cit, obovate, gradually narrowed downward to the peti- 

 ole and more abruptly pointed. Near the base, the borders are iiearly 

 entire or slightly serrulate, as in the leaves figured by Heer, loe. cit.; but 

 from below "the iniddle upward, they are coarsely and sharply serrate. 

 The secondary veins are equidistant, parallel, gradually curving from 

 the medial nerve to near the borders, where the curve becomes more 

 marked, following the borders and sending strong branches to the point 

 of the teeth. The nervation of this species is well marked and similar 

 to that of some of our living species of Juglans : J. rupestris, Engl., for 

 example, from Oaliforniii. One of the specimens bears three leaflets still 

 a[)parently attached to a common petiole, and all have the same form, 

 same size and nervation. In all our specimens the secondary veins are 

 niore curved than in any of tlie figures given by Heer. It is with this 

 species as with J. rugosa compared to J. acuminata; identity is not more 

 recognizable than characters to point out specific differences. 



2. Point of Rocks Station, Union Pacific Eailroad. 



Fine-grained, brown, ferruginous, very hard shale, with generally 

 broken remains of leaves flattened in the plane of stratification. 



Onoclea SENSiBiLis, L., as described by Dr. jSTewberry in Notes on 

 The Later Extinct Flortis, &c., p. 39, and figured, PI. viii, ined. The 

 specimen is upon a piece of white, hard limestone from near the mouth 

 of the Yellowstone Eiver. ^ 



Popuhis arctica, Heer. Same form as that of Fl. Arc, PI. v, Fig. 9. 

 The leaf is broken and its outline obsolete. 



QuEROUS Olafseni, Heer('?). The specimen only shows the middle 

 part of a leaf oval in outline, at least six inches long, four inches wide, 

 with secondary veins oblique, parallel, straight, as represented for this 

 species and for Q. Grmnlandica, Heer, in Fl. Arc, PL x, Figs. 3 and 5. 



CoRYLUS McQuARRii, Forb. In many specimens, representing it in 

 various forms of its leaves. 



CoRYLUS ORANDiFOLiA, Newy. It may be a variety of the former spe- 

 cies, of which so many are described and figured by Heer in the Arctic 

 Flora. The essential difference is not in the size of the leaves, but in 

 the greater distance between the secondary veins, especially the two 

 lower pairs. The nearest form to this one is that in Heer's Fl. Arc, 

 PI. ix, Fig. 3. 



Plat^nus Guillelm^, Heer, (?) apparently. The characters of the 

 leaf are scarcely distinguishable. 



Andromeda, species. Two specimens representing the same part of 

 a leaf: its lower part with, the petiole. Its form is intermediate be- 

 tween that of A. Grayana, Heer, and Diospiros lancifoUa, Lx.; ovate- 

 lanceolate, one inch wide in the middle, where it is broken, gradually 

 tapering to the petiole by an inward curved line ; petiole one-half inch 

 long, narrow, like the medial nerve; one pair only of secondary veins 

 are discernible, ascending from the base of the leaves and following the 

 borders. The other veins above are nndistinctly seen, emerging in a 

 more open angle, and curving to the borders. 



CoRNUS RHAMNiFOLiA, Heer, Fl. Ter. Helv., p. 28, PL cv, Figs. 22-25. 

 It resembles somewhat Juglans rugosa, Lx., in some of its varieties, dif- 

 fering by shorter and broader leaves, two inches wide, scarcely two 

 and a half inches long; secondary veins all siuiple, nearly straight, 

 slightly diverging from each other in passing from the medial nerve to 

 quite near the borders, where they curve abruptly; uervilles distinct, 



