296 GEOLOGICAL SURVEY OF THE TEREITORIES. 



DiospiEOS STEXOSEPALA, Heer, (Fl. Alas., p. 35, PI. viii, Tig. 8.) One 

 leaf only, ^itli the point destroyed as in the specimen from Alaska, but 

 satisfactorily identified by its form and peculiar nervation. The, medial 

 nerve is broad and g-rooved, the secondary veins, with angle of diverf]^- 

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

 thick tertiary and intt^rmediate fibrilhne. The leaf is shorter and pro- 

 portionally broader than the leaves of X>. lancifoUa. 



Besides the named species, the shales have undeterminable fragments 

 of Popidus, liJiammiS, Juglans, &c. 



17. Mouth of Wak:m Sprixg Caxo^\ 



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

 specimens, representing one species. 



QUEECUS Gaudexi, Lsqx., (Am. Jour. Sci., 3Iay, 1859, p. 360.*) 

 Described from an imperfect specimen from Bellingham Bay, and figured 

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

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

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

 The base of our leaf is not rounded, but gradually narrowed ; the i^oiut 

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

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

 The aflinitv of this species is with Quercxis Drymeja^ Uug., as figured iu 

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



18. Six Miles above Spei>'g Caxox axt) Tor of Hills between 

 Fort Ellis ax'd Botteler's Eaxxh. 



Dark-greenish, coarse-gTained shale, breaking in every direction, hard- 

 ened by metamorphism. 



Phr AG3IITES Alaskana, Ucer, (Fl. Alas., p. 21, PI. v, Fig. 12 and 12 h.) 

 Two specimens, agreeing in ever}' 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 al^o the same. Professor Ileer supposes that this 

 form may be a variety oi Fhrafjmites Oeningensls. The discovery in our 

 American western Tertiary formations of remains of exactly the same 

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

 value. 



PopuLUS LEUCOPHYLLA, Ung. The Specimens represent this spe- 

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

 X). 29, PI. 4, Fig. 1-5. It appears of common occurrence in our Tertiary 

 strata. Heer has published it from Alaska, and Dr. Newberry -s Pojmhcs 

 accrifoJia (Am. Lye. Xat. Ilist. of New York, vol. 18, p. 03, PI. xiii, Fig. 

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



PoPULUS MUTABiLis var. LAXCIFOLIA, 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 undistiyct 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. 



S.UJX Grct:^'LANDica, neer, (Fl. Arc, I, p. 101, PI. 1, 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 



