346 Dr. E. A. N. Arber. Fossil Plants of the [Feb. 17, 



fossils, at any rate, in a new genus Linguifolium, and to regard them as a new 

 species L. Lillieanum, so named in honour of Mr. Lillie. They are certainly 

 specifically distinct from the Chilean plant. This plant may be also compared 

 with the Copiapaea plicatella of Solms* from Chili, and the Blechnoxylon 

 talbragarense of Etheridgef from New South Wales, the latter believed to be a 

 Palaeozoic fossil. 



In addition to Linguifolium Lillieanum, a number of other well preserved 

 species occur. There is a new species of Chiropteris (Plate 8, fig. 6), the 

 distal margin of which is lacerated, and which I propose to name 0. lacerata 

 sp. nova. Leaves of a species of JBaiera (Plate 7, figs. 1, 2, and 3), closely 

 similar to but perhaps distinct from Baiera paucipartita, Nathorst, from the 

 Ehaetic of Bjuf, Sweden, are also associated. A Bictyopliyllum, which may be 

 closely compared with Bictyopliyllum acutilobum (Braun), is present. Other 

 fronds are those of Thinnfeldia lancifolia (Morris) (Plate 8, fig. 7) and 

 Cladophlebis australis (Morris). Numerous examples of a Ta>niopteris, which 

 is no doubt T. Daintrcei, McCoy, occur (Plate 8, fig. 5). Among the 

 Equisetaceous remains, pith-casts are represented which resemble those of 

 Phyllotheca or Schizoneura, but, in the absence of foliage, it is impossible to 

 refer them to the one genus rather than the other. However, the small 

 detached leaf-sheaths of a Phyllotheca are undoubtedly present. Finally, 

 associated with the above plants, are many examples of the Indian (Gondwana) 

 Palissya conferta (Oldh.) (Plate 8, fig. 5). 



From this brief review of this interesting flora it is obvious that it is of 

 Mesozoic age, and belongs either to the late Triassic (Ehaetic) or to the early 

 Jurassic period. Linguifolium, which is a homoeomorph of Glossopteris, just as 

 Zonchopteris is of Alethopteris, or Dictyozamites of Zamites, is already known 

 from Ehaetic rocks in Chili. Chiropteris is at present confined to the Ehsetic, 

 some species occurring in the Triassic rocks of Europe, and also, as Prof. Seward 

 has shown, in the Stormberg Series (Ehaetic) of South Africa. Baiera pauci- 

 partita, Nath., and Dictyophyllum acutilobum (Braun) occur in the Ehaetic of 

 Europe. Thinnfeldia lancifolia (Morris) is found chiefly in the Ehaetic, 

 though it no doubt also occurs in the Jurassic. Cladophlebis australis (Morris) 

 is known both from the Jurassic and Ehaetic in the Southern Hemisphere. 



The only two plants which, at present, are exclusively Jurassic are the 

 Gondwana (Eajmahal) Palissya conferta% (Oldh.), and Tceniopteris Baintreei, 



* Solms, ibid., 1899, p. 594, Plate XIII, figs. 8-11. 



t Etheridge, ' Eec. Austral. Mus.,' 1899, vol. 3, p. 135, Plates XXIV-XXVII. 



I It is interesting to find that Dr. Halle has just described this plant from Graham 

 Land in the Antarctic. ('Wissen. Ergebn. Schwed. Siidpolar-Exped., 1901-1903,' 1913, 

 vol. 3, Part 14, p. 86, Plate VIII, figs. 26-40.) 



