recto, prominente,excurrentc; nervis secundariis sub angulis 05-75° orientibus, 
incequalibus approximates, disti metis apice ramosis ; nervis tertiariis angulis 
acutis exeimtibus, tenuibus, marginem versus inter se conjunctis. 
Obs — In this fossil the coriaceous texture is very pronounced, in 
consequence of the 'well-defined impression which it has left in the sandstone. 
It shows a robust petiole, which ultimately merges into the strongly marked 
midrib. The form of the leaf is oblong to lanceolate, the base acuminate; 
towards the apex it is narrowed, according to the fossils at hand; the margin 
is entire. The proportionately rather fine secondary veins issue at slightly 
acute angles, arc unequal, approximate, dividing at a considerable distance 
from the margin, and forming loops with their branches. The tertiary veins 
spring at acute angles from the secondary ones, arc fine, short, and merging 
towards the margin gradually into the loop-forming branches. The leaf 
reticulation lias not been preserved in the coarse stone matrix; but the 
remaining traces show that the meshes must have been very minute, and the 
reticulation very complex. 
These characters would assign the leaf in question to the genus 
Qnercus, which also appears under some other very characteristic forms in 
the Fossil Flora of Australia, as will be shown in the sequel. Of hitherto 
known fossil oaks, no one approaches the Quercus Hookeri so closely as the 
Qnercus nereifolia, A. Braun (Heer, Tertiary Flora of Switzerland, Part II, 
Pl. LXXIV, figs. 1-4, and PL LXXY, tig. 2). The first-named species has, 
however, stiffer and proportionately broader leaves, and more distant and more 
obtuse-angled secondary veins; on the other hand, the Q. nereifolia has sub- 
coriaceous, elongate-lanceolate leaves, with more numerous secondary veins. 
"Whilst, therefore, the latter agrees best with Qnercus imbricaria and Q. P hellos, 
our species, as regards form, consistence, and venation of the leaf, approaches 
more closely the East Indian Q. Amherstiana, Wall. (Pl. VII, fig. 10), and 
Q. fenestrate, Itoxb. (PL VII, fig. 4). The Qnercus nereifolia, A. Braun, docs 
not occur in the Tertiary Flora of North America; in its stead we find three 
other species of oak with entire leaves, viz., Q. straminea, Lesq., Q. cineroides, 
Lcsq., and Q cucalaj pit folia ,* which may be regarded as more remote 
analogues of the Q. Hookeri. On the other hand, a closely allied species, 
* Quercus eucalijpCifoUa, sp. nov. — Foliis rigide coriaceis, ovato-laneeolatis, basi acutis, margine integer- 
rimis; nervatione camptodroma; nervo primario valido prominente ; nervis secundariis subangulis 45-55° 
orientibus, tenuibus simplicibus. 
The leaf fossil represented on Plato XXI, fig. 3, in the above quoted work by Lesquereux, cannot be 
identical with the leaves of Quercus chforophylla, Ung., as has been supposed. The latter have a different 
form, never broadest at the base, with the secondary veins numerous, very approximate, and issuing at more 
obtuse angles. The texture of these leaves is coriaceous, but not to the same extent as those of the fossil 
referred to. Their strong texture and form give them a eucalyptus-like appearance. 
