The Coal of Australia. 
437 
the nerving of the present species is not more oblique than that 
of the G. Browniana or G. Nilsoniana. In this species also, from 
the anastomosing being continued up to the margin, it results that 
the nerves are little closer at the margin than at the middle of the 
leaf, while in the G. angustifolia the anastomosing is confined to 
the central portion, and the dichotomising goes on to the margin, 
where in consequence the neuration is finer and closer than 
towards the midrib. None of the specimens are perfect at the 
extremities, the largest being three inches long and seven lines 
wide at the basal fracture, and diminishing about two lines in that 
length towards the distal end, being about eight lines wide in the 
middle. Disconnected fragments show that the base diminishes 
insensibly to a lengthened petiole, as in the G. Browniana, and 
that the apex is elliptical and pointed. 
Very abundant in the gray shale of Wollongong; not uncom¬ 
mon in the hard siliceous schists of Arowa, N. S. Wales. 
Pecopteris ? tenuifolia (M’Coy). 
Sp. Char. Bipinnatifid (?); pinnules and rachis very slender 
each about half a line wide; pinnules very long, oblique, 
linear, apparently simply united to the rachis by their entire 
base, one very strong midrib running throughout; secondary 
nerves unknown. 
If this be truly a Pecopteris, it is distinct from all others by its 
very narrow, linear leaflets. The only plant I have seen at all 
resembling it is the Zamites obtusifolius from the shale of the 
oolitic coal-fields of Blackheath, Richmond, United States, 
exhibited some weeks since by Mr. Lyell to the Geological Society. 
The specimens alluded to of this latter plant seem imperfectly 
preserved, but still show, on some portions of the pinnules, a 
neuration running parallel with a strong midrib. This great 
midrib seems to me incompatible with Zamites, so that although 
I point to the resemblance between the American and Australian 
plants, I prefer placing the latter provisionally in Pecopteris, as I 
have seen no trace in my imperfectly preserved specimens of a 
parallel neuration; and even if it should hereafter be found to 
exist, I conceive it would be necessary to form a new genus, in- 
