68 GEOLOGY OF LOWER MESOZOIC ROCK.S OF QUEENSLAND, 



the Wianamatta Stage of the Hawkesbury Series of New South 

 Wales. Schizoiienra africaiia occurs in the Beaufort Series in 

 South Africa (Permian), and, according to Seward, is related to 

 iS'. yondwa7ieiLiiis from the Talchir, Damuda, and Panchet Series 

 (Permian and Lower Triassic) of India. The remaining species, 

 Equisetites rotiferum, is a widespread type, and very similar 

 forms are widely distributed in both Rheetic and Jurassic strata. 



Filicales.— A majority of the true ferns of the Ipswich Series 

 indicate a Rhtetic or possibly greater age for the flora. Sterile 

 Cladophlebis-ironds of the C. anstralis type are of very wide- 

 spread occurrence in rocks varying in age from Rhsetic to Middle 

 Jurassic. Cladoph/ebis Roylei is a somewhat older type, occur- 

 ring in the Raniganj Series (Upper Permian) of India. Dictyo- 

 phyllnm riigosum is a fairly widespread Jurassic (Lower Oolite) 

 species, but there is so little difference between it and species of 

 Dictyophyllum in Rhsetic floras, that it cannot be regarded as a 

 reliable indicator of age. The species of Thinnfeldia in the 

 Australian Lower Mesozoic rocks do not appear to be represented 

 in the Northern Hemisphere. The three species, T. Feistmait- 

 teli, T. odontopteroides, and T. lancifolia, are present in the 

 Molteno Beds in South Africa; and T. odoiilojiteroides and T. 

 lancifolia in the Mesozoic flora in Argentina. Dancr-opsis 

 Hughesi is a Rhretic or older form, occurring in the Rhsetic Beds 

 of Tonkin, the Burghersdorp Beds of South Africa (Triassic), 

 and the Middle Gondwanas of India (Triassic). Sagenopteris 

 rhoifolia is itself a Rhsetic species, but it is at times difhcult to 

 distinguish between it and S. Phillipsi, a common Jurassic form. 



Ginkgoales. — The Ginkgoales are represented by a compara- 

 tively large number of species, and, in addition, they are also 

 relatively abundant as regards numbers of individuals. Ginkgo 

 antarctica occurs in the Lower Mesozoic rocks in New South 

 Wales, but there is no record of its exact locality or horizon. G. 

 digitata is a very variable form met with in both Rhsetic and 

 Jurassic rocks. G. magnifolia occurs in the Jurassic strata of 

 Oregon, and also bears some slight resemblance to Baiera storm- 

 bergensis from the Stormberg flora of South Africa. Baiera 

 bidens is a very common type, and is similar to species which are 



