76 GEOLoi'iV' OF Lower Mesozoic rocks of Queensland, 

 Table v. — (continued). 



The ages of the species, or of very closely related species, in 

 cohimn 2 are indicated in brackets after each one. 



Examining this Table, we find that, excluding the six species 

 common to the two lists, there are nine species with affinities to 

 species older than Jurassic, and fifteen species with Jurassic 

 affinities. Of the nine species regarded as older than Jurassic, 

 eight occur also in the Ipswich Series, and are the species which 

 survived from the Ipswich to the Walloon Epoch; there is only 

 a single species (and that an equisetaceous pith-cast, Schizo7ieura 

 sp.a) which could be considered as an argument in favour of an 

 age older than Jurassic for the Walloon Series; whereas there 

 are fifteen species characteristic of Jurassic floras, which appear 

 in the Walloon Series, and were not present in the Ipswich 

 Series. No other conclusion, then, seems possible, than that the 

 flora of the Walloon Series indicates that the Series is homo- 

 taxial with strata of Jurassic age, and the greater number of 

 species (see Table v.) indicate a lower Jurassic age, Liassic or 

 Lower Oolite. It is possible that the Walloon Series represents 

 deposition over a period covering both the Liassic and Lower 

 Oolite of Europe. 



