PART 4 .] 
Feist mantel: Notes on Fossil Floras in India. 
199 
Besides these, the Jurassic Flora of Siberia and the Amur countries is very rich in forms 
of the group of Alethoptens Whitlyensis, which also is represented in the Damudas, and 
is again frequent in the Upper Gondwanas. 
Explanation of Figs, it toll. 
Figs. 4, 5.—Two leaves of Gingleo lobata. 
Figs. 6, 7.—Two leaves, with peduncles, of Gingko crassipes. 
Fig. 8.— Czekanowshia, sp. 
Several leaf fragments, which I believe to belong to this peculiar form. 
Fig. 9.— Phanicopsis, sp. 
A specimen, which I refer to this genus. 
Figs. 10, 11, (10a, 105, 11a ).—Dicksonia comp, concinna, Heer, pinnae of natural size 
and pinnulfe enlarged. 
XVIII.— Notes on Vertebraeia, Schizoneeea Zeugophyllttes, and Noggeeathia. 
From the Indian Darnuda series originally two species of Yertebraria were described, i. e ., 
Yertebraria radiata, Boyle, and Yertebraria indica, Boyle,* which, however, represent only 
one and the same form, the latter being the longitudinal section, the former the transversal 
section. Both were (1850) placed by Ungerf with Sphenophyllum. But as this was only 
an incorrect supposition, we have to keep the original names. 
From Australia similar relations are to be recorded. There is described a Yertebraria 
australis, McCoy,J which is the only figure of this genus with this name. It is a traus- 
versel section, and was compared with our Yertebraria radiata, Boyle. This Yertebraria 
australis, McCoy, however, was also placed by Unger with Sphenophyllum as Spheno¬ 
phyllum australe. As, however, this transferring of the Yertebraria australis to the genus 
Sphenophyllum was incorrect, the name Yertebraria is to be retained also for this form. 
But there is in Dana’s Geology (United States Exploring Expedition, 1819, pi. 14) another 
form, described as Clasteria australis. The closer examination, however, shows that Clas- 
teria australis, Dana, is to Yertebraria australis, McCoy, in the same relation as is Verte- 
braria indica, Boyle, to Yertebraria radiata, Boyle, or, in other words, Clasteria aus¬ 
tralis, Dana, is the longitudinal section of Yertebraria australis, McCoy, both representing 
one species. 
We have here therefore a fossil plant from Australia which within four years was 
described with three different names, i. e., Yertebraria australis, McCoy (1847), Clasteria 
australis, Dana (1849), and Sphenophyllum australe, Unger (1850); and for which the 
name Yertebraria australis, McCoy, as the original one, has to be kept. 
I thought it useful to point to these relations, in order to prevent mistakes, and to show 
how in some papers on the Australian coal-hearing rocks confusion may arise when Yerteb¬ 
raria, Sphenophyllum, and Clasteria are quoted as three different forms. 
I have also to explain another case, the contrary of the preceding, i. e., the correlation 
or identification of three different forms in comparing our coal strata with those in Australia : 
I mean the three forms, Schizoneura, Zeugophyllites, and Noggerathia. A closer examina¬ 
tion and comparison of these three forms shows that they are as different as the former 
three are identical. 
» Royle, Illuatr. of the Botany, &c., Him. Mount, 1839, tab, ii. 
+ Unger gen. et spec, plant, foss., 1850. 
t Ann. and Mag, Nat. Hist., Vol. 20, 1847, 
