MIOCENE FLORA— ALASKA. 259 



sharply denticulate to the base; secondary nerves oblique, parallel, the lower pairs 

 more open, all generally simple except a few tbin tertiary nerves near the borders 

 passing to the points of the teeth; surface smooth, nervilles rarely distinct, petiole 

 comparatively long. . 



Resembles Corylus McQuarrii, differing by the smooth surface, the 



nervilles obsolete, the nerves not branching, the long petiole, &c. 



Hab. — Cuyachick, Cook Inlet, Alaska. 



CUPULIFERjE. 



Car pin us grandis, Ung. 



In numerous specimens. 



Hab. — Same as the preceding. Described also from Greenland by 

 Heer, and in this volume from the Green River Group. 



Fag- us Deucalion is, Ung. 



The collection has a single specimen of this species. Heer has 

 described it from Greenland. 

 Hab. — With the preceding. 



Qiiercus Dallii, sp. nov 



Leaves subcoriaceous, oblong, lanceolate-acuminate, rounded or subcordate at base, 

 6 to 12 centimeters long, 4 to 8 centimeters broad, deeply equally undulate or obtusely 

 dentate; lower lateral nerves nearly at right augles, branching, the others oblique, gen- 

 erally simple, all craspedodrome. 



The secondary nerves are more or less distant according to the size 

 of the leaves, being generally 14 pairs. 



The relation of this species is to both Q. grcenlandica and Q. Olafseni, 

 Heer, two species from Greenland, from which this one especially differs by 

 the rounded or subcordate base and the position of the lower nerves nearly 

 at right angles. Except that these leaves are much larger, they may also 

 be compared to Paullinia germanica, Ung., "Syllog. Plant.," iii, p. 52, pi. 

 xvi, fig. 8, and are possibly referable to this genus, mostly represented now 

 in tropical America. 



Hab. — Cook Inlet, Alaska. 



