8 
to be Rhaeto-Liassic, and perhaps a little older than that of the Clent and Malvern 
Hills floras. Haast’s main contention, however, that the two floras of Mount Potts 
and the Clent Hills were not separated by any great interval of time, is confirmed. 
But, so far, none of the plants from the Mount Potts beds have been described 
or figured. In 1887 the first specimens were submitted to an European palaeobotanist, 
Ettingshausen(l). He recorded seven species from these beds, all new except the 
Polypodium Hochstetteri of Unger. None of the new types, however, were figured, 
much less described, and these names remain to this day discredited nomina nuda. 
Ettingshausen regarded the age of the beds as Triassic. 
In 1912 I published two preliminary notes(2) having reference to this flora, 
in which I pointed out that the age of the flora was either Rhaetic or Lower Jurassic, 
and that Glossopteris itself does not occur(3). 
Conclusions as to the Age of the Beds .—-The following is a list of the records 
from Mount Potts which are described here :•— 
Equisetales— 
Phyllotheca minuta sp. nov. 
Fern-like Plants— 
Linguifolium Lillieanum Arber. 
Chiropteris lacerata Arber. 
Dictyophyllum acutilohum (Braun). 
Cladophlebis australis (Morr.). 
Thinnfeldia lancifolia (Morr.). 
Tceniopteris Thomsoniana sp. nov. 
Ginkgoales— 
Baiera robusta sp. nov. 
CoNIFERALES— 
Elatocladus conferta (0. & M.). 
Of the nine determinations from this locality, five are new species. Of the 
latter, the genus Chiropteris is, so far as we know, wholly Rhaetic. Phyllotheca , 
in the Mesozoic rocks, is also much more abundant in the Triassic than in the 
Jurassic. Linguifolium has been previously recorded from both the Rhaetic and 
Jurassic. Tceniopteris Thomsoniana and Baiera robusta are closely similar to Rhaetic 
species. 
As regards the other determinations, Dictyophyllum acutilobum and Thinnfeldia 
lancifolia are essentially Rhaetic. Cladophlebis australis has a wide range, from the 
Rhaetic to the Lower Cretaceous. Elatocladus conferta has been previously recorded 
only from Jurassic rocks. 
Thus we see that the affinities of the Mount Potts flora strongly indicate a 
Rhaetic rather than a Jurassic age. At the present time it is, however, impossible 
to distinguish between a Rhaetic and Liassic flora. In this instance at least two 
essentially Jurassic types occur, and one must therefore admit the possibility of a 
Liassic age. At the same time I am, on the whole, inclined to regard the Mount 
Potts flora as essentially Rhaetic, and base that opinion especially on the occurrence 
of Chiropteris and Thinnfeldia lancifolia. It certainly has very strong affinities to 
other floras usually termed Rhaeticj and the occurrence of one or two types hitherto 
only known from the Jurassic is not of great moment in this connection, seeing 
that many plants are already known to be common to the two floras. 
Age. —Rhaetic. 
(1) Ettingshausen (1887 1 ), (1887 2 ), (1878 3 ), 
(1890). 
(2) Arber (1913 1 ), (1913 2 ). 
(3) See also pp. 1, and 20-22. 
