522 Descriptions of the Fossil Plants 



In Q. Gaudini, the secondary nerves are curved and run 

 along the margins. In the other species mentioned they 

 are less numerous, and more curved, and the marginal 

 teeth are coarser. 



Formation and locality. Miocene Tertiary strata, Bel- 

 lingham Bay, W. T. 



QuERCus Banksi.efolia Newb. 



Desc. Leaves very long, linear, lanceolate, long-point- 

 ed and acute at either end ; margins set with numerous 

 nearly uniform, acute, appressed teeth turned toward the 

 superior extremity; midrib strong, running the entire 

 length of the leaf ; lateral veins numerous, simple, 

 strongly marked, parallel, arched upward, terminating in 

 the teeth of the margin ; reticulated nervation buried in 

 the thick parenchyma of the leaf, and generally invisible 

 in the fossil state. 



This beautiful leaf resembles, in the style and strength 

 of its nervation, those of the living chestnut oak, but is 

 more slender than any other species, living or fossil, which 

 has come under my observation. 



Among described fossil species, Q. drymeja Ung., 

 (Chloris protogffia S. 113, Taf. 32, figs. 1-4,) Q. lon- 

 chitis Ung., (Flor. v. Sotzka, Taf. 9, figs. 3-8,) and Q. 

 Saffordi Lesqx., (Geol. Survey of Arkansas, p. 319, 

 Tab. VI. fig. 3,) seem to approach it most closely, the 

 former two, indeed, being very nearly allied to it ; but in 

 these species the leaves are broader and the lateral nerves 

 are more remote. In Q. Saffordi the leaf is, perhaps, 

 equally slender, but the teeth are coarser, and less de- 

 pressed, and the nervation much less strong and regular, 

 resembling in this respect that of the willow oaks ( Q. 

 phcllos, etc.). The living species with which our plant 

 may be compared are Q. Xalapcnsin, and, judging from 

 Prof. Heer's descrii)tion of it, Q. Sartorii Liebman. Both 

 of these are from Mexico. 



