282 C. A. SUSSMILCH AND T. W. E. DAVID. 



Carboniferous Period. So far no angular unconformity ha& 

 been found to occur in the Seaham-Paterson region between 

 the Carboniferous strata and the Lower Marine Series (the 

 lowest subdivision of the Permo-Carboniferous System), 

 nevertheless crustal movements are indicated (1) by the 

 fact that the terrestrial deposits of the Middle-Upper Car- 

 boniferous Epochs are followed by the marine sediments 

 of the Permo-Carboniferous Period; (2) the appearance of 

 an entirely new flora — the Glossopteris flora; (3) the 

 appearance of an abundant marine fauna, very different 

 from that of the Lower Carboniferous Epoch. This new 

 crustal movement was one of subsidence, which brought 

 about a transgression of the sea over what were probably 

 great highlands during the Carboniferous Period. It is 

 proposed to call this last crustal movement the Hunterian 

 disturbance. 



Appendix I. 



Note on the correlation of the Fossil Floras of the Car- 

 boniferous Rocks, by A. B. Walkom d.Sc. 



The Carboniferous strata under discussion in this paper 

 have yielded numerous fossil plants on several horizons. 

 The specimens were some time ago handed over for detailed 

 examination to Professor A. A. Lawson, of the University 

 of Sydney. Owing to the impossibility of his having a 

 preliminary survey completed in time for the results to be 

 made use of by the authors of the present paper, Professor 

 Lawson consented to allow me to make a cursory examin- 

 ation of the material, with the object of expressing an 

 opinion as to the correlation of the beds in which the plants 

 occur with strata in other parts of the world. The sug- 

 gestion that I should do this came from Professor David, 

 and I have to thank him for the opportunity of examining 

 the material. 



