GEOLOGICAL SURVEY OF THE TERRITORIES. 

 Analyses of coals from the Eocky Mountains "by J. T. Hodffc. 



371 



e:ndmeeation and description of fossil plants 

 feom the western tertiary formations. 



• South FarJc, near Castelld's Range. 



A yellowish, laminated, soft shale, breaking easily and splitting in 

 thin layers. Remains of plants well preserved and distinct, with 

 remains of insects and feathers. Specimens collected and communicated 

 by Mr. S. A. Allen. 



Opbioglossum Alleni, sjp. TWtl. 



Leaf, elliptical, narrowed by a curve to the acute base ,• shorter and 

 broader than in 0. vnJgafnm, L., of our time, with the same areolation* 



The leaf is about 3 cent, long", (point broken,) a little more than 

 2 cent, broad, marked in the middle by the remnant of a fruiting 

 pedicel. No fossil species of this genus has been as yet published, but 

 a small one, 0. ccocemim, Mass., from the Tertiary of Verona, Italy. 



Thuites callitrina, Ung., cMor., p. 22, PI. vi. Fig. 2. 



Though the fragments are small, they are very distinct, and there is 

 no appreciable difference from the descrii)tion and figures of this 

 species. The same specimen bears a fragment of Saltje like aS'. Ungu- 

 lata, Gopp. 



Plajs^era longifolia, sp. nov. 



Leaves oblong, lanceolate, obtusely pointed, wedge-shaped at the base 

 to a petiole; borders simply dentate; secondary veins thick, simple, 

 craspedodrome. 



It differs from Plancra Ungeri, Ett., and its varieties, by longer, pro- 

 portionally narrower leaves; by more oblique, straight, always simple, 

 secondary veins, which are thicker and more distant; by more obtuse 

 and larger teeth; some of the leaves ore unequal at base and curved 

 on one side. Average length, 4 cent., H cent. wide. The distinct 

 areolation is that of the species as marked in Heer, Fl. Fert. Helv., PI. 



