with Descriptions of New Species of Fossil PI 



bear considerable resemblance to if, as Q. Mediterran -. CJng., 

 and Q. Haidingera, Etts. ; but in both these species the mai 

 nal dentations are less uniform in size, and, when having a 

 similar outline, are smaller. 



Formation and Locality. Lower Cretaceous sandstoi 

 Banks of Rio Dolores, Utah. 



Quercns sinuafa. (n. sp.) 



Leaves small, obovate in general outline, narrowed i" tin' petiole, 

 or slightly decurrent ; margins deeply lobed, lobes rounded, broader 

 than the sinuses that separate them, three nearly equal "ii either 

 side, summit broadly rounded or obscurely lobed, often oblique; 

 nervation strong and simple, midrib straight or - 1 i lx 1 1 1 1 _> flexed, 

 giving off lateral branches, which run to the nun-ins of each lateral 

 lobe. 



The o-eneral form of this leaf is much like that of one livii 

 Q. oUusiloba, though it is smaller and more symmetrical. 

 Among the many fossil species which have been described, 

 there is none which approaches this very closely ; mosl -I' them 

 bearing either simple, entire leaves, or toothed, rather than 



lobed ones. 



Formation and Locality. Lower Cretaceous strata. Banks 

 of Dolores river, Southern Utah. 



The Teetiaey Flora oi Noetb A.meeica. 



As has been said in regard to the Cretaceous flora, our I 

 ledge of the vegetation which clothed this continent duri 

 Tertiary period has all been gained within a very :'■ 

 is still exceedingly imperfect. The first notia 

 collected from our Tertiary deposits is given by Prof. J. D. Dana, 

 in the Geology of the Exploring Expedition under l 

 U. S. X. This comprises figures and brief descriptioi 

 number of fossil leave- in,,,, Birch B arthe mouth I 



