20 
of Australia, Plate VIII., and named it P. prcecupressina. The structure 
of the fossil in question is, however, not so well defined. 
No. 30 is worthy of special mention. It is particularly interesting. I 
have figured and named it as follows :— 
M yet ace a;. 
Eucalyptus pr^ecoriacea, sp. nov. 
Plate II. 
The figure shows portions of branchlets with leaves attached. Branchlets 
evidently angular. Leaves almost sessile, lanceolate, falcate, probably 
6 inches in length and 1 inch wide, tapered at the base into a short petiole. 
The venation consists of several veins disposed longitudinally, no one of 
which can be said to form a midrib. Some of these veins are more con¬ 
spicuous than the others. 
There are three types which naturally suggest themselves as possessing 
leaves with parallel veins, as shown in the figure, namely, the pliyllodineous 
Acacia, some of the Hakece, like H . dactyloides , Cav.,and Eucalyptus coriacea , 
A. Cunn. I have carefully compared the fossil with these types, and I have 
convinced myself that it approaches most nearly to Eucalyptus coriacea . The 
fossil leaves are very oblique at the base, they have numerous parallel veins, 
without any, or much sign of any, anastomosing veins between them. The 
FTakea and Acacia leaves nearest in character are not oblique at the base, 
and the anastomosing veins are rather a feature. I am, therefore, of opinion 
that we have a branchlet here of a species of Eucalyptus of the group 
Renantherece , and allied to E. coriacea . Should this conclusion be borne out 
by later discoveries, it means that at the period when the Mornington beds 
were deposited the different groups of eucalvpts had already become 
differentiated. In naming this fossil I felt at first very much disposed to 
invent a new genus for it, as another genus, namely, Angophora , has 
eucalyptus-like leaves, and probably had with the modern Eucalyptus a 
common ancestor ; but I thought, on maturer consideration, that if the 
remarkable differences in leaf venation had already arisen, the genus Euca¬ 
lyptus had probably also already been evolved. The different kinds of leaf 
venation in eucalypts are referred to in a paper read by me before the Linnean 
Society of New South Wales, Yol. for 1900, p. 581, and figured diagrammati- 
cally in Plate XXXYI. At one end of the series is the parallel-veined type, 
at the other the type characterized by having the secondary veins almost 
transverse. 
DESCRIPTION OF PLATES. 
Plate I. 
Fig. 1. Sterculia Muelleri, sp. nov. (Spec. No. 1). 
Fig. 2. Drimys ? (Spec. No. 2). 
Fig. 3. Nephelites Ulrichi , sp. nov. (Spec. No. 3). 
Fig. 4. Mollinedia Muelleri , sp. nov. (Spec. No. 5). 
Fig. 5. Daphnandra Selwyni , sp. nov. (Spec. No. 6). 
Figs. 6, 12. Cinnamomum polyrnorphoides, McCoy (Specs. Nos. 7, 15). 
Fig. 7. Argophyllites parvifolici, sp. nov. (Spec. No. 9). 
Fig. 8. Panacites Howitti , sp. nov. (Spec. No. 10). 
Fig. 9. Eucryphia Gregorii, sp. nov. (Spec. No. 11). 
Fig. 10. Pittosporumprceundulatum, sp. nov. (Spec. No. 13). 
Fig. 11. Carpolithes acaciceformis, sp. nov. (Spec. No. 16) 
Plate II. 
Eucalyptus prcecoriacea, sp. nov. (Spec. No. 30). 
Hunter’s Hill, 
Sydney, 6th September, 1901. 
