PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 505 

 11. QUERCUS CONSIMILIS, 11. Sp. 



Leaves petioled, lanceolate, acnmiuate, wedge-shaped or rounded at 

 base, where they are often unequal ; margins usually dentate, occasion- 

 ally only undulate, sometimes entire below, denticulate above; 

 teeth acute, often spinous, sometimes short and closely appressed; 

 nervation fine and regular ; lateral nerves slender, parallel, generall}' 

 arched upward, below ; where margin is entire, camptodrome, above, 

 craspedodrome, the branches terminate in the marginal teeth ; tertiary 

 nervation consisting of miuute branches connecting the lateral nerves 

 either directly or anastomosing, with fine quadrangular net-work filling 

 the intervals. Fruit ovoid ; when mature 2 centimeters in length by 15 

 millimeters in breadth ; cupule scaly, covering nearly half of the glaus. 



Formation and locality. — Miocene ? strata. Bridge Creek, Oregon. 

 Collected by Prof. Thomas Condon. 



12. QUERCUS SIMPLEX, n. Sp. 



Leaves lanceolate, long-pointed, narrowed, and slightly rounded at 

 the base ; margins entire ; nerv^ation fine and regular. 



Formation and locality. — Miocene ? strata, Bridge Creek, Oregon. Col- 

 lected by Prof. Thomas Condon. 



13. QUERGUS CASTANOPSIS, n. sp. 



Leaves oblong-elliptical, rounded at the base; nervation regular; mid- 

 rib straight, branches parallel, simple, terminating in the principal teeth 

 of the margin ; margin doubly dentate, the larger teeth receiving the 

 extremities of the nerve branches, and each carrying a minor denticle ; 

 u|)per surface smooth ; texture of the leaf coriaceous. 



Formation and locality. — Argillaceous limestone, Yellowstone Eiver. 

 Collected by S. M. Eothhammer. 



14. QUERCUS PAUCIDENTATA, U. Sp. » 



Leaves oblanceolate, inches in length by 1^ in breadth, narrowed to 

 the base, sometimes uusyrnmetrical, long-pointed, and acute at the sum- 

 mit ; margins entire below, coarsely toothed above ; nervation strong 

 and regular, about ten branches on each side of the midrib, which curve 

 upward, festooned below, terminating in the teeth above. 



Formation and locality. — Miocene ? Tertiary, Bridge Creek, Oregon. 

 Collected by Prof. Thojnas Condon. 



15. QUERCUS LAURIFOLIA, n. Sp. 



Leaves petioled, lanceolate, C inches in length by Ih inches in width, 

 equally narrowed to the point and petiole ; margins entire, or faintly 

 toothed, or undulate ; nervation regular ; midrib strong, straight, lat- 

 eral branches, about ten j^airs, arching gently upward, terminating in 

 the margins. 



Formation and locality. — Burned shales, over lignite beds. Fort Ber- 

 thold, Dakota. Collected by S. M. Eothhammer, on the expedition of 

 General Alfred Sully, U. S. A. 



