BY A. B. WALKOM. 69 



abundant in both Rhsetic and Jurassic rocks. B. ipsviciensis 

 may be compared with B. multifida, occurring in the Rhsetic of 

 North America: and B. Simniondsi also occurs in the Wiana- 

 matta Stage of the Hawkesbury Series of New South Wales. 

 Stachyopilys annularioides is a very similar type to specimens 

 referred to as Stachyopilys sp., in the Stormberg flora of South 

 Africa, and also to Sphenolejns rhcetica from the Pvhsetic of San 

 Juan (Argentine). 



Gycadophyta. — The percentage of species of this group is un- 

 usually small in the Ipswich Series. Should the genus Tceui- 

 opteris ultimately prove to be a cycad, however, the percentage 

 of cycads in the Ipswich flora would be a normal one for eaily 

 Mesozoic floras. The specimen showing expanded bracts, re- 

 ferred to Bennettites ( Williamsonia) sp., cannot be regarded as 

 indicating any special age, as it agrees with similar specimens 

 from the Mixteca-Alta tiora of Mexico (Rhsetic-Liassic), and also 

 with B. Carruthersi from the Wealden of England. Fterophyllum 

 multUineatiim occurs in the Rhajtic of Tonkin, and similar 

 species are found in the Burghersdorp Beds of South Africa. 



Genera incerkB sedis. — The species of Sphenopteris do not offer 

 any evidence as to the age of the Series. Species of Tceniopteris 

 are not usually to be regarded as reliable indicators of geological 

 age. Of the species in the Ipswich Series, some appear to be 

 confined to Australia, while others of them occur in South Africa 

 and India. 2\ Tenison- Woodsi and 7\ Carruthersi are found in 

 the Stormberg flora (Molteno Beds), and the latter also in the 

 Burghersdorp Beds in South Africa; T. crassiuervis occurs in 

 the Rajmahal Series (Lias) of India. Stenopteris eloiigata occurs 

 also in the Stormberg flora of South Africa. 



The accompanying Table (Table iii.) shows the relationships 

 of the species of the Ipswich flora to species in other floras. The 

 Table is arranged in four columns, column 1 showing the species 

 with affinity to species older than Rhsetic, column 3 those with 

 affinity to species in Rhsetic floras, and column 4 those of Jurassic 

 affinity. The Stormberg flora of South Africa is so similar in 

 general appearance, that the species common to the two are 

 grouped separately in column 2. 



