374 GEOLOGICAL SUEVEY OF THE TEREITOEIES. 



These branches are of the same size and form as the one figured by 

 Heer, in Urwelt der Schweitz, (PL xi, F. 1.) A% they are, however, 

 found in connection with the former si^ecies, at least in the same beds 

 of sandstone, they may repi^esent mere divisions of it. 



DeLESSERIA INCEASSATA, SJ). 710V. 



Frond sessile, trifid from its base, divisionSy 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 tapering to the base, 2 cent, wide at its broadest part, near the 

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

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

 prints on the stone, is different from that of any living species of this 

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

 of a group of segments of the saime form. 



DELESSEEIA LINGULATA, sp. 710V. 



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

 tracted in the middle, with a broad inflated 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 dubius, Lsqx., Am. Jour. Science and Arts, (1868,) p. 203. 



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

 lanceolate, sharp-i)oiuted, broadest at the base, where they are abruptly 

 contracted to the point of attachment. 



I have found, probably at the same place 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-J 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. I^o 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 sijecies is as yet unascertained. 



Arundo Goppeeti, Al. Br. 



Large fragments of leaves with characters of this species. 



Pheagmites Oeningensis, Al. Br. 



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

 also in fragments within the Eocene sandstone. 



Sabal Campbellii, (?) NeTjoh. 



It is described in Supt.,p. 13. The fragments are very abundant, but 

 always obscure. It may be a different species. 



