29G GEOLOGICAL SUEVEY OF THE TEEEITOEIES. 



DiospiROS STENOSEPALA, Heer, (Fl. Alas., p. 35, PI. viii, Fig. 8.) One 

 leaf only, with tlie point destroyed as in the specimen from Alaska, but 

 satisfactorily identified by its form and peculiar nervation. The medial 

 nerve is broad and grooved, the secondary veins, with angle of diverg- 

 ence 50°, curve from the middle upward and along the borders with 

 thick tertiary and intermediate fibrillae. The leaf is shorter and pro- 

 portionally broader than the leaves of JJ. lancifolia. 



Besides the named species, the shales have undeterminable fragments 

 of Fopulus, EJiamnus, Juglans, &g. 



17. Mouth op Warm Spring Canon. 



Fine-grained, gray sandstone, hardened by metamorphism j only two 

 specimens, representing one species. 



QuERCUS Gaudini, Lsqx., (Am. Jour. Sci., May, 1859, p. 360.) 

 Described from an imperfect specimen from Bellingham Bay, and figured 

 by Gaudin (Fl. Ital., 2d Mem., PI. vi. Fig. 5)' from European specimens. 

 Gaudin's species does not appear to agTce exactly with the American form, 

 but rather to be a variety of Quercus Scillana, Gaud., as he supposes it. 

 The base of our leaf is not rounded, but gradually narrowed ; the point 

 is lanceolate or tapering 5 and the secondary veins, thick at and near the 

 base, and curving, enter the upturned point of the distant small teeth. 

 The affinity of this species is with Quercus Brpmeja, Ung., as figured in 

 Heer's Fl. Ter. Helv., (PI. Ixxv, Fig. 18.) 



18. Six Miles above Spring Canon and Top of Hills between 

 Fort Ellis and Botteler's Eanch, 

 > 



Dark- greenish, coarse-grained shale, breaking in every direction^ hard- 

 ened by metamorphism. 



Phragmites Alaskana, Heer, (Fl. Alas., p. 24, PI. v, Fig. 12 and 12 &.) 

 Two specimens, agreeing in every point with the author'^s description 

 and figure. The distance between the longitudinal veins is 1 millimeter, 

 with intermediate veinlets, extremely thin and somewhat obsolete ; the 

 size of the leaves is also the same. Professor Heer supposes that this 

 form may be a variety of Phragmites Oeningensis. The discovery in oui' 

 American western Tertiary formations of remains of exactly the same 

 characters as those which separate this form- is proof of its specific 

 value. 



POPULUS LEXJCOPHYLLA, Uug. The Specimens represent this spe- 

 cies in various of its forms as figured in Gaud., Fl. Ital., 1st Mem., 

 p. 29, PL 4, Fig. 1-5. It appears of common occurrence in our Tertiary 

 strata. Heer has published it from Alaska, and Dr. IS^ewberry^s Po;pulus 

 acerifolia (Am, Lye. l^at. Hist, of JN^ew York, vol. 18, p, 65, PI. xiii, Fig. 

 5-8, ined.) is referable to it. 



PoPULUS mutaeilis var, lancifolia, Heer. Two entire small 

 leaves, the largest one 2J inches long, ovate-lanceolate, obtuse, thick, 

 coriaceous, with distinct nervation of the species^ the other scarcely 

 half as long, nearly oval, with undulate borders and undistiuct nerva- 

 tion. These leaves are more obtuse than any of the numerous forms 

 figured by Heer of this polymorphous species ; but there is no other 

 difference. 



Salix GRffiNLANDiCA, Hecr, (Fl. Arc, I, p. 101, Pi. 4, Fig. 10.) 

 Two specimens representing only the lower half of a leaf, agreeing with 

 the description and figure of this species. The leaf appears of a thick 



