177 
Genus Ginkgo, Kaempfer. 
Ginkgo sp. 
Fig. 35. 
Fig. 35 (C., allotment 49, Jnmbunna).—The leaf fragment shown in the 
figure appears to belong to a leaf consisting of a petiole bearing a fan-shaped 
lamina, divided by a deep median sulcus into two halves, a form of leaf like 
that of the existing Ginkgo biloba. The specimen shows no trace of any 
division of the lamina into lobes other than the two broad segments separated 
by a median sulcus ; this character points to Ginkgo as the most fitting 
generic designation. The imperfect nature of the specimen and the known 
variability of Ginkgo leaves render it inadvisable to add any specific designa¬ 
tion. The specimen may be compared with a small form of Ginkgo digitata, 
Brongn.* * * § It is not improbable that some of the smaller specimens figured by 
Stirling as Baiera subgracilis'f may be identical with the type represented in 
Fig. 35. 
Specimen 201 (allotment 1, parish of Kongwak) is similar to that shown 
in the figure. 
Genus Baiera, Braun. 
Baiera australis, McCoy. 
Figs. 36, 37. 
1892. Baiera australis, Stirling’s Report, PI. I., Fig. 2. 
1899. Baiera australis, Stirling’s Report, p. 5, PI. 1, Fig. 3. 
Leaves of similar form to those of Baiera Phillipsi, Nath., but of rather 
smaller size. The deeply dissected lamina in the specimens figured (Figs. 36, 37) 
consists of five linear segments, each traversed by several veins and tapering 
distally to a bluntly rounded apex. 
In Stirling’s “Reports on the Victorian Coal-fields,” several fragments of 
Baiera leaves are figured as Baiera australis, McCoy,J which are no doubt 
specifically identical with those shown in my figures 36 and 37. I have there¬ 
fore adopted McCoy’s term for the Victorian leaves described in the above 
definition. 
This form of leaf bears a resemblance both to Baiera gracilis, Bunb., and 
to B. Phillipsi, Nath.; it occupies an intermediate position between the two 
species, differing from the typical examples of the former in its slightly smaller 
size and in the smaller number and greater width of the segments, while the 
divisions of the lamina are slightly narrower than those of Baiera Phillipsi. 
The type of leaf from the English oolite originally described by Phillips as 
Sphenopteris longijolia, and more recently named by Nathorst, Baiera Pliillipsi ,§ 
agrees closely with those shown in Fig. 36 as regards the size of the lamina, but 
in the Victorian specimens the veins in each segment are fewer in number and 
wider apart. A leaf somewhat similar in form, is figured by Nathorst from 
rhaetic beds of Scania as Ginkgo taeniata, || and Heer’s species, Ginkgo Sibirica ,^[ 
* Seward (00), PI. IX., Fig. 10. 
f Stirling (99), PI. 1, Figs. 5 and 6. 
J Stirling (92), PI. 1, Fig. 2 ; and (99), PI. I. 
§ Seward (00), p. 270, Fig. 47 ; and PI. IX., Fig. 4. 
|| Nathorst (78), PI. XIII., Fig. 17. 
Heer (77). 
