400 GEOLOGICAL SUEVEY OF THE TERRITORIES. 



QUEECUS Wyomingiana, SJ). nov. 

 Quercus Olafseni var., Heer, Arct. Fl., p. 471, PI. xlix, Fig. 1. 



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

 by distant short teeth ; nervation penninerve, 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 simple 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 branched. The permanence of these 

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

 consider them as specific. 



Eucalyptus Haeeingiana (?), Ett., Har. Foss. Fl., p. 84, PL 



xxviii. Figs. 2 to 25. 



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

 entire, medial nerve thick, nervation obsolete. 



The similarity of these two leaves of ours with those loe. 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 tion is obsolete, and the mere outlines of leaves of this kind, without 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 sjiecimens, 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 parallel. The details of areolation 

 are not discernible. 



Ehamnus Clebueni, 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 : J/i the Mils west of Black 

 Butte. 



Ehamnus salicipolius, Lsqx., Am. Jour. Sci. & Arts, 1808, p. 206. 



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



Juglans ehamnoedes, Lsqx., Eept. 1871, p. 294. 



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

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

 fibrillse and secondary veins less curved, appear referable to Bhamnus 

 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. 



