374 GEOLOGICAL SURVEY OF THE TERRITORIES. 



These brandies are of the same size and form as the oue figured by 

 Heer, in Urwelt der Schweitz, (PI. xi, F. 1.) As they are, however, 

 found in connection with the former species, at least in the same beds 

 of sandstone, they may represent mere divisions of it. 



Delesseria incrassata, aj). nov. 



Frond sessile, trifid from its base, divisions, thick, obovate, attenuated 

 downward to a narrow pedicel ; surface plicate-rugose. 



The sandstone has deep prints of these leaves, which appear as 

 united in groups from the base, or growing in tufts. One of these leaves 

 or divisions seen isolated is oblanceolate, abruptly short-pointed, grad- 

 ually tai:)ering to the base, 2 cent, wide at its broadest part, near the 

 X)oint, 3 mill, at base, 5 cent. long. If by the form of its leaves this 

 plant is a Delesseria, the thickness of its divisions, judged from their 

 prints on the stone, is different from that of an}^ living species of this 

 genus. The prints, however, may have been made by the superposition 

 of a group of segments of the same form. 



Delesseria lingulata, s-p. nov. 



Leaf small, coriaceous, entire, obtuse, rounded at base, slightly con- 

 tracted in the middle, with a broad iutlated medial nerve. 



The leaf or segment is 2 cent, long, 12 mill, broad, of a subcoriaceous 

 or thickish consistence. The sandstone has many fragments of the 

 same form and size. 



Abietites ditbius, Lsqx., Am. Jour. Science and Arts, (1868,) p. 203. 



Leaves erect or slightly open, imbricated around the branches, exactly 

 lanceolate, sharp-pointed, broadest at the base, where they are abruptly 

 contracted to the point of attachment. 



I have found, probably at the same i^lace where Dr. Leconte obtained 

 his specimens, a quantity of branches of this species, varying from 2 

 cent, to 3 mill, in thickness, all indicating the same characters. The 

 leaves are 8 mill, long, 1^ mill, broad, near the base. Stems and branch- 

 lets are marked by the deep and distinct scars of the base of the leaves, 

 varying in form according to the size of the branches. No cones or 

 seeds have been found as yet. It is common in the lower lignitic 

 Eocene. Good specimens of the stems have been obtained in the choco- 

 late-clay beds of the lignite, near Fort Steele, by Professor B. F. Meek. 

 Its affinity to living sjiecies is as yet unascertained. 



• Arundo Gopperti, AL Br. 



Large fragments of leaves with characters of this species. 



Phragmites Oeningensis, Al Br. 



In connection with Abietites duhius in the liguitic-bearing strata, and 

 also in fragments within the Eocene sandstone. 



Sabal Gampbellii, (?) Newh. 



It is described in Supt.,p. 13. Tliefragmentsare very abundant, but 

 always obscure. It may be a different species. 



