112 
Quercus Austini, sj). nov. 
Plate IX, Figs. 11, 12. 
S 'p. Char. — Q. foliis coriaceis, breviter petiolatis lineari-lanceolatis, basi 
acutis, apicem versus angustatis, margine integerrimis, rarius denticulatis, 
subtus tomentosis (?) ; nervatione brocbitlodroma ; nervo primario prominente ; 
nervis secundariis subangulis 70-80° orientibus, numcrosis, parallels, 
curvatis, ramosis; nervis tertiariis parce evolutis et vix eonspicuis. 
Ohs. — Differs from both the preceding species by much smaller and 
narrower leaves, exhibiting slightly developed tertiary nerves. The borders 
are sometimes minutely toothed. The fossil leaves show their under surface, 
which may have been covered by a felt, like the leaves of the much analogous 
Quercus mexicana , Ilumb. et Bonpl. 
Of the fossil species hitherto described, ours is related to Quercus 
myrtilloides , Ung. 
Locality and Horizon. — Witlierden’s Tunnel, Two-mile, near Emmaville 
(Vegetable Creek Township), on Vegetable Creek Main Deep Lead ; brown 
carbonaceous clay under basalt. 
Quercus IIartogi, sp. nov. 
Plate IX, Fig. 19. 
Sp. Char. — Q. foliis coriaceis, petiolatis, lanceolatis, basi rotundatis, 
apicem versus angustatis, margine grosse spinuloso-dentatis; nervatione mixta, 
in parte inferiore plerumque camptodroma, in superiore craspcdodroma; nervo 
primario valido, recto prominente apicem versus attenuato ; nervis secundariis 
fere tenuibus, subangulis 40-50° orientibus, numcrosis arcuatis subflexuosis 
apice ramosis, ramulis siepe in spinulas dentium exeuntibus ; nervis tertiariis 
tenuibus, latere externo angulo acuto exeuntibus, ramosissimis, reticulum 
distinctum formantibus. 
Ohs. — The leaf is like that of Quercus drymejoides , Ett., from the 
Dalton beds (see Part I), as regards its toothed borders and form ; but it 
differs from the latter by a roundish base, and a compound type of nervation. 
The secondary nerves are comparatively thin, more bent and branched at their 
ends. Their branchlets, running sometimes to the teeth, form a spinula. The 
tertiary nerves are thin, and diverging from the outer side of the secondary 
ones at acute angles, branch into a rather prominent network. 
