-8 MR. NEWELL ARBER ON THE CLARKE COLLECTION  [Feb. 1902, 
certainly open to considerable doubt, in view of the recent proof of 
identity of the various forms of Glossopteris Browniana, Brongt. 
Feistmantel' regarded it as intermediate between Gl. indica, Schimp., 
and Gl. communis, Feist., but Prof. Zeiller? has since shown that 
these two forms are identical. The fossil is, however, strongly 
characterized by the form of the marginal nervation, and the specific 
rank may perhaps be retained until further evidence is available. 
(Glossopteris taniopteroides, Feist.) Specimen No. 45.— 
There is another specimen in the collection, without reference to 
locality, but in all probability from the Neweastle Series, which 
would appear to be identical with the Gl. teniopteroides of Feist- 
mantel.* The frond is 4 inches long, and doubled on itself about 
the midrib, one side being an inch wide. The nervation is very 
oblique, and scems closely similar to the pseudo-parallel, elongate 
reticulation just described in Gl. ampla. So far as I can determine, 
there would seem to be no real distinction between these two plants. 
I regard Feistmantel’s Gl. teniopteroides as a smaller frond of 
Gl. ampla. 
VERTEBRARIA, Royle, 1839. 
‘Tlustr. of Bot. Himalayan Mts.’ vol. 1, p. xxix.* 
VPRTEBRARIA AUSTRALIS, McCoy. 
Ty pe-—Woodwardian Mus. Camb., Foreign Plant Coll. No. 1 (? type), also 
Nos. 38, 49-53, & 66. : 
Localit y—Whitish shales and clays, Mulubimba. 
Vertebraria australis. 
1847. McCoy (47) p. 147 & pl. ix, fig. 1. 
1878. Feistmantel (78) p. 84, figured. 
1883. Tenison-Woods (83) pp. 75 et seqq. 
1890. Feistmantel (90) p. 87 & pl. xiv, fig. 6, pl. xv, figs. 1-3. 
Clasteria australis. 
1849. Dana (49) p. 719 & pl. xiv, figs. 3-5. 
Sphenophyllum australe. 
1850. Unger (50) p. 72. 
In 1894 Mr. R. Etheridge,jun.* described some Australian specimens 
in which almost complete fronds of Glossopteris were preserved in 
organic continuity with a structure which he regarded as a rhizome. 
Judging by his figures, this rhizome is quite unlike Vertebraria 
australis.’ Possibly it was preserved in a different manner, as an 
external impression, without the preservation of the wedge-like 
segments (as seen in transverse section) which are so characteristic 
of Vertebraria.6 Whatever may be the structure of Mr. Etheridge’s 
stem, and its relation to Vertebraria, there is a specimen in the 
Clarke Collection (No. 66) of an undoubted Vertebraria with 
| Feistmantel (90) p. 1238. 2 Zeiller (96). 
3 Feistmantel (90) p. 128 & pl. xviii, figs. 1, 1 a. 
* Etheridge (94) p. 228 & pls. xviii—xix. 
5 Vertebraria is now known to be the rhizome of Glossopteris ; see Zeiller 
(96)! and Oldham (97). 
6 Prof. Zeiller (96)' has furnished an explanation of the origin of these 
structures. 
