12 GEOLOGICAL SURVEY OF THE TEERITORIES. 



figured from the Mississippi Tertiary iu Traus. Am. Phil. Soc, vol. XIII, 

 PI. xix, Fig. 2. 



Magnol'ia Hilgardiana, Lsqx.(?) Specimen showing the middle 

 part only of a large leaf with audulate, entire borders and the nervation 

 of this species. On one side of the leaf the secondary veins are slightly 

 nearer to each other and also more oblique than on tiie other. It is ap- 

 j)arently identical. 



YiTis Olriki, Heer. One of the two leaves referable to this species is 

 well preserved enough to show the nervation and the large entire obtuse 

 teeth of the borders, which mark the specific characters. These leaves, 

 however, are smaller than the fine one figured by the author in Fl. Arc, 

 1, PI. xlviii, Fig. 1; broadly cordate, enlarged in a short obtuse lobe 

 above the middle, then more abruptly pointed. It is palmately 5-nerved 

 from the base, the lower pair of veins nearly horizontal ; the lateral ones 

 of the same angle as the divisions of the medial nerve, much branching 

 outride 5 nervilles obsolete ; leaf of a thin texture. 



Ficus TiLT^FOLiA, (?) Al. Br. A large leaf whose mere outline and 

 skeleton of veins are obscurely marked upon the stone. It is referable 

 as well to Dombeyopsis cequifoUa, Gopp. The lower part of the leaf is 

 total}' erased. 



Acer secreta, sp. nov. The leaf is seen only in its upper part; 

 showing three deeply cut, lanceolate, long-pointed lobes with undulate 

 borders marked by a few large teeth. The lobes are contiguous, nearly 

 parallel and equal, separated by narrow hut obtuse sinuses. The sec- 

 ondary veins are thin, very oblique, (angle of divergence, 25° ;) Tertiary 

 nervation obsolete. By its nervation and the mode of division of the 

 borders, this leaf is comparable to A. pseudoplatamis v?iY. paucidentata, as 

 figured in Gaud., 3d Mem., PI. iii, Fig. 2, differing, however, much 

 by the deeply cut, lanceolate-pointed, nearly equal and parallel lobes. 



Ehamnus rectinervis, Heer, Eeport, p. 295. 



Ehus deleta, Heer, Fl. Ter. Helv., HI, p. 83, PI. cxxvii, Fig. 8. 

 Leaves membranaceous, ovate-lanceolate, obtusely pointed, entire ; sec- 

 ondary veins open, camptodrome, thick near the base ; tertiary nerva- 

 tion obsolete. The specimens agree with the description of the author, 

 showing leaves of the same size more or less enlarged above the rounded 

 base and of the same kind of nervation. 



JuGLANS RUGOSA, Lsqx. Many leaves exactly similar in form and 

 nervation to those of Point of Eocks Station. There is a large number 

 of specimens of this species from both localities. 



JuGLANS OBTUSiFOLiA, Heer. Leaves broader, enlarged in the mid- 

 dle, apparently obtusely pointed, rounded to the petiole, entire; surface 

 of the leaves deeply runcinate by depression of the secondary veins, 

 which curve near the borders and are equidistant ; nervilles and ter- 

 tiary nervation distinct ; appear identical with Heer species, Fl. Ter. 

 Helv., Ill, p. 89, PL cxxix. Fig. 9. 



4. Fischer's Peak, Eaton Mountains. 



A hard, greenish-yellow, metamorphic sandy shale, with distinct re- 

 mains of plants, mostly flattened in the plane of stratification. 



Pteris erosa, sp. nov. Leaflets apparently broadly lanceolate or 

 ovate-lanceolate, (?) (the upper- and lower part of the leaflet being 

 destroyed,) with irregularly crenulate or lacerate borders; medial nerve 

 thick; veinlets oblique, (angle of divergence, 60°,) straight, mostly 

 simple, some forking, near or at the base, rarely above the middle, dis- 

 tant and parallel. By its uervation and the form of the leaflets, this 



