70 THE LATER EXTINCT FLORAS OF NORTH AMERICA. 



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 nerva- 

 tion, 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. (Chlor. Prot., p. 113, 

 PL XXXII, figs. 1-4), Q. lonchitis Ung. (Fl. Sotzka, PL IX, figs. 3-8), 

 and Q Saffordi Lesq. (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 depressed, .and the nervation 

 much less strong and regular, resembling in this respect that of the willow 

 oaks (Q. Phellos, etc.). The living species with which our plant may be 

 compared are Q. Xalapensis and, judging from Professor Heer's description 

 of it, Q. Sartorii Liebman. Both of these are from Mexico. 



Formation and locality: Cretaceous (Puget Sound group). Ghucka- 

 nutz, near Bellingham Bay, Washington. 



QlJERCUS CASTANOIDES Newb. 

 PI. LXV, fig. 6. 

 Proe. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 506. 



" Leaf linear-lanceolate, acute, 6 inches long by 1 inch broad; margins 

 remotely and somewhat irregularly set with coarse, in some cases spinous, 

 teeth; nervation strong; midrib straight, sharply defined; lateral branches 

 unequally spaced, simple, forked near the extremity, terminating in the 

 marginal denticles." 



Only imperfect fragments of this leaf are contained in the collection 

 made by Dr. C. A. White, but these are quite sufficient to show the species 

 to be distinct from any other known. The irregularity in the dentation of 

 the margin and in the spacing of the main nerve branches separate this 

 from the chestnuts and bring it within the genus Quercus, and it would 

 seem to be allied to the living and fossil chestnut oaks. More leaves and 

 the fructification will be needed before a complete description can be 

 written, but it is hoped that the figure now given will serve for its recog- 



