BY A. B. WALKOM. 71 



This Table at oDce shows that the flora of the Ipswicli Series 

 is of a facies at least as old as Rhaetic. In addition to the species 

 occurring in Uhietic floras, there are also a number of species 

 which occur in other parts of the world in rocks older than 

 Nhsetic. The number of species in the Ipswicli flora, which 

 represent Jurassic types, is not large, and nearly all of these 

 are examples of species in which it is often difficult to find satis- 

 factory distinctions between Rhsetic and Jurassic species. The 

 only two species of the Ipswich flora, which are characteristic of 

 Jurassic rocks, are T'ceniopteris crassinervis and Ginkgo magtii- 

 folia] and, regarding the latter of these, I have a slight doubt 

 as to the determination in the Ipswich Series 



Of twenty-two species in this 'J'able, eighteen occur in Rhtetic 

 floras, six occur in floras older than Rhsetic, and seven in Jurassic 

 floras, only two of the latter, however, being characteristic of 

 Jurassic floras. 



The Table, together with the foregoing discussion, shows fairl}^ 

 conclusively that the flora of the Ipswich Series must be regarded 

 as at least as old as Rhietic, and probably somewhat older. 



[h] Walloou Serias. — The flora of the Walloon Series comprises 

 the following species : — 



Equisktales. 



Equisetifes rotijerum Tenison-Woods. 

 Equisetites cf. rajinahalensis Oldham and Morris. 

 Schizoiieura sp.a Seward. 

 Schizo'iieura sp. 



Filicales. 



(1;Osmundaceye. 



C'lodophlebis aiistralis (Morris). 



C. Roylei Arber. 

 {?)Matonineie. 



Phlebopteris aleihopUroides Etheridge Jr. 

 Dipteridinse. 



Dictyophyllum riigosumil) Lindley and Hutton. 



D. Davidi Walkom. 

 UausmaniLia(\) Buchii (Andrjc). 



