139 
runs a nerve, a mixed nervation, combining botli the craspedodrome and 
brochidodrome type, by approximate secondary nerves, and a minutely-meshed 
network. Moreover, the leaves of the living Banksia are always more or less 
truncate, or at least roundly-ohtuse on their apex. Respecting the above 
characters, the leaves of the fossil Banksice of Australia perfectly agree with 
those of the recent ones, excepting the last specified character. 
Among the species described here, only one, Banksia Campbelli, 
possesses leaves being broad and obtuse on their apex ; the other species 
exhibit leaves, the laminae of which are narrowed gradually towards the apex; 
they are therefore analogous to the Banksia species of the European Tertiary 
Elora, which have mostly leaves gradually narrowed towards their apex. 
Banksia Lawsoni, sp. nov. 
Plate XIII, Figs. 1, 1 a. 
Sp. Char. — B. foliis coriaceis, hreviter petiolatis, elliptico-oblongis, 
utrinque paullo angustatis, margine integerrimis ; nervatione dictyodroma ; 
ncrvo primario valido, recto ; nervis secundariis tenuissimis approximate 
parallelis, apice ramosis ; nervis tertiariis brevissimis dictyodromis, rete 
microsynammato prominente. 
Obs. — The petiole is 5 millimeters long ; the oblong lamina is rapidly 
decreasing towards the base, and there barely acute, but towards the apex 
apparently narrowed. The borders are untoothed, sharply prominent, like 
those of leaves, especially of Banksia, to which a firm, coriaceous texture is 
due, and where the borders are thickened by a cartilaginous nerve. The 
primary nerve being comparatively strong and prominent, sends out numerous 
secondary nerves. They diverge at rather acute angles, are thin and approxi- 
mate. Respecting their appearance near the margin, they anastomose, forming 
fine loops, which are discernible only on a few spots of the leaf. The tertiary 
nerves are much shortened, and lose themselves at once in a network which 
evidently bears the type of that of Banksia, especially of B. integrifolia , B. 
serrata, &c., being minutely meshed, but sharply prominent. Amongst the 
fossil species hitherto described, ours is nearest related to Banksia JDeikeana, 
Ileer, from the Tertiary Elora of Switzerland; but different from that just 
named by the secondary nerves being more approximate, and sent out at a 
little more obtuse angles of divergence. 
Locality and Horizon . — Old Rose Valley Lead, with the preceding. 
