80 GEOLOGY OF LOWER MESOZOIC ROCKS OF QUEENSLAND, 



The marked difference between the two floras shows in the 

 Gyninosperms. In the Equisetales and Filicales, there is little 

 difference as regards number of species. Only two of the species 

 of Equisetales, and seven of the Filicales, however, are common 

 to the two Series; and, of the others, those in the Ipswich Series 

 are of older type than those in the Walloon Series. When the 

 Gvmnosperms are examined, however, a marked distinction 

 between the two Series is to be observed. Twenty-two species 

 are described from the Lowei* Mesozoic rocks, and only two of 

 these species are common to the Ipswich and Walloon Series. 

 These two species are Ginkgo cf. magnifolia and Baiera Sim- 

 mondsi. Ginkgoales are abundant, both as regards number of 

 species and number of individuals, in the Ipswich Series, but are 

 only poorly represented in both respects in tlie Walloon Series. 

 Cycads are represented very sparsely, as regards number of 

 species, in the Ipswich Series, whereas they constitute perhaps 

 the most prominent feature of the Walloon flora, being very wide- 

 spread in distribution and occurring in large numbers on some 

 horizons. The species of Otozamites form one of the most char- 

 acteristic and distinctive features of the Walloon Series. Up 

 to the present, no Conifers are known from the Ipswich Series,"*^ 

 whilst there are three species representing three genera from 

 the Walloon Series. 



Table viii. shows the species occurring in Queensland, which 

 are, so far as we know, found only in one Series of the Lower 

 Mesozoic rocks. 



Table viii. 



Species known only in the 

 Ipswich Series. 



l^ltylJotlieca australis 

 Ntocalamiles ha^renAii^ 

 X. cf. Carrerei 

 Schizoneura cf. a/ricana 

 Coniopterift delicatula 

 Thinnfe/dia acuta 

 JJan(eop,sis Hughesi 

 !Spli e. nopt 1 1 • /.v lacunosa 

 Tceniopttris Dunstani 

 T. wianamattcE 



Species known only in the 

 Walloon Series. 



Ph/ehojjferis al ethopterokles 

 Dictyophyllum Dacidi 

 Ha usniannia{ V) Buck ii 

 PhyUopteri.s FeiMmanfeii 

 Twniopttrix spatn/ata 

 T. spatidata var. major 

 FtilophyUum ( Wif/ia/n.-^oiiia) ptcttn 

 HtcropJiyllnm alnionnc 

 F. contiguam 

 F. Nathorsti 



* See footnote on p. 65. 



