400 GEOLOGICAL SURVEY OF THE TERRITORIES. 



QuERCUS Wyomingiana, s2>. nor. 

 QuercuH Olaf.seni var., Heer, Arct. Fl., p. 471, PI. xlix, Fig. 1. 



A large ovate lanceolate pointed leaf, with borders undnlate, or marked 

 by distant short teeth ; nervation penuiuerve, craspedodrome. 



Heer, loc. cit., has considered this species as probably a variety of 

 Quercus Olafseni, which is described in the first vol. of the Arct. 

 Flor., with numerous figures. All these show the borders doubly 

 and obtusely dentate, with mostly simide secondary veins, on a broader 

 angle of divergence and somewhat curving in ascending to the borders. 

 In this leaf of Black Butte, as in that considered as a variety by Heer, 

 •the borders are merely undulate, or distantly marked with short, pointed, 

 simple teeth, while the secondary veins are on a more acute angle, 

 straight and comparatively much Ijranched. The permanence of these 

 characters, remarked in our specimens from Black Butte, force us to 

 consider them as specitic. 



Eucalyptus Haekingiana (?), Ett., Hiir. Foss. FL, ]), 84, PI. 



xxviii, Figs. 2 to 25. 



Leaves small, linear-lanceolate, pointed, tapering to the base, thickish, 

 entire, medial nerfe thick, nervation obsolete. 



The similarity of these two leaves of ours with those loc. cit. Fig. 4, 

 7, and 11 is perfect; but in the European species, as in ours, the nerva- 

 tion is obsolete, and the mere outlines of leaves of this kind, without 

 comparison of specimens, are not sufficient for identification. 



MacClintockia Lyallii, Heer, Arct. Fl., i, p. 115, PI. xv. Fig. 2. 



A mere fragment, good enough, however, to show the characters of 

 this remarkable species. It is the lower half of a coriaceous, entire, 

 lanceolate, or oblong leaf, marked by five primary veins, with alternate 

 thinner secondary ones, all nearly i)arallel. The details of areolation 

 are not discernible. 



Ehamnus Cleburni, Lsqx. 



Species described from Golden specimens. Professor B. F. Meek 

 found two fine leaves of the same species also in burnt red shale of 

 another locality. The specimens are labeled : In^the kills west of BlacJc 

 Butte. 



Rhamnus salicifolius, Lsqx., Am. Jour. Sci. & Arts, 18G8, p. 206. 



Found, like the former, by Professor Meek, at the same locality. 



Juglans rhamnoides, Lsqx., Eept. 1871, p. 204. 



Eepresented by a large number of good specimens. However, the 

 relation of these leaves is still uncertain; some of them, by strong 

 fibrillae and secondary veins less curved, appear referable to Rliammis 

 Eridani^ Heer, though different by the form of the leaves, while others 

 have a nervation more analogous to species of Juglans, especially to 

 Juglans rugosa, Lsqx. 



