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



W. R. Browne for his assistance in the petrological part 

 of the work. Finally I have to thank Prof. T. W. E. David 

 for much kindly advice and assistance, both in the field 

 and in writing up the results. 



The Subdivisions of the Carboniferous System. 

 The strata included in the Carboniferous System of this 

 part of New South Wales fall definitely into two subdivis- 

 ions, (a) a lower division of marine origin, and (b)an upper 

 division of terrestrial origin (Plate XIX). The lower division 

 contains a marine fossil fauna of undoubted Lower Car- 

 boniferous age, and for these beds it is proposed to retain 

 Prof. W. N. Benson's name of the Burindi Series, this series 

 may be looked upon as being the equivalent of the middle 

 Mississippian formation of North America. The upper 

 division includes most of the remaining part of the Carboni- 

 ferous formation; the strata are of terrestrial origin and 

 are characterised by a fossil flora known as the Rhacopteris 

 Flora. For this series the name Kuttung is proposed, this 

 being the name of an aboriginal tribe which inhabited the 

 region in which these strata are most extensively developed. 

 In the northern hemisphere the Rhacopteris Flora is con- 

 sidered to be of Culm to Middle Carboniferous age, but for 

 the present the Kuttung Series of New South Wales will be 

 considered to occupy the whole of the time period repre- 

 sented by the Middle and much of the Upper Carboniferous 

 formation of the Northern Hemisphere and to be the 

 equivalent of a large part of the Pennsylvanian System of 

 North America. 



The following table gives the subdivision proposed for 

 the Carboniferous formation of New South Wales, and gives 

 also the subdivision already in use for the overlying Permo- 

 Carboniferous formation of the same region : — 



