19 
complex arrangement. The primary pinnae are here prolonged, lanceolate, or 
elongate, the secondary ones placed at various acute angles, oblong, entire or 
sinuate, or indistinctly dentate or lobed, more or less narrowed towards the 
apex, rounded or merely obtuse or acuminate ; the tertiary pinnae are broad at 
the base, shortly ovate or even more shortened, entire, obtuse, or acuminate. 
In the pinnae shown in Figs. 1 and 2, the tertiary ones are only partially 
developed, whereas Figs. 4 and 5 are derived from portions of fronds which 
had perhaps attained a still more complex arrangement. 
The characters described agree with no other genus of fern so well as 
with Pteris. Among living species of the genus, we find in the Australian 
Pteris tremula , 11. Brown, an analogous representative of the fossil. Of 
fossils hitherto described, the P. incequalis , Heer, from the Tertiary of Switzer- 
land, may be regarded as the most nearly related species. 
I name this species after Mr. J. K. Ilume, of Yass, an enthusiastic 
Geologist, who discovered the specimens figured. 
Locality and Horizon. — Dalton, near Gunning ; in hard siliceous grit, 
reposing on Silurian rocks. 
MONOCOTYLEDONES. 
Microrrhagion Liversidgei, sp. nov* 
Plate I, Figs. 7-11. 
Sq). Char. — M. inflorescentia cymoso-paniculata, pcdunculis dicliotome 
ramosis ; fructibus baccatis exsiccatis, subglobosis. 
Ohs . — Several corresponding fragments of a fruiting branch, lying 
together in a greyisli-brown schist. They disclose a cymosc inflorescence ; 
the flower stalks are dichotomously branched, their stems remarkably broad 
and flat, finely striated. When in their natural state, however, these latter 
were probably not so compressed as they appear in the impression ; they must 
have been amplexicant, very fine, and succulent. The fruits, enlarged in 
Figs. 8-11, are very small, almost globose, the surface finely and irregularly 
wrinkled, indicative of its probably berry-like character. 
* [This species is not a Tertiary form. See foot-note on the next page. — R.E., jnr.] 
