Nomenclature for Marine Tertiary Deposits. 79 



The name Jan Juc remains, and is referred to by M'Coy as the 

 locality whence several of his fossils came. 



Aldingan. 



The term Aldingian has been used by Professor Tate in 

 speaking of the section at Aldinga, but we should prefer the 

 spelling we give. In the cliff sections, as described by Messrs. 

 Tate and Dennant, " Miocene " overlies " Eocene," and the term 

 Aldingian as used by them includes both sets of strata. If it be 

 confined to the lower series only, it might perhaps be employed, 

 though it violates the principle that a name should not be given 

 from a locality where two distinct series are in contact. As we 

 differ from the views of Messrs. Tate and Dennant on the 

 question as to its equivalence or otherwise with the Spring Creek 

 series, a type name may be thought advisable, for the present 

 at any rate, though our own views are opposed to its use. 



We should like once more to emphasise the point that the 

 names we give are given in the first place to the beds displayed 

 at the localities from which the names are derived, and we are 

 thus able to fix a top and a bottom to each formation. There 

 can be no doubt, except in our opinion in the case of Aldingan 

 and Jan Jucian, of the distinctness of the faunas they typify. 



CORRELATION. 



We now come to consider the different sets of beds to be 

 ranged under these names, for series of strata agreeing paleeonto- 

 logically must be grouped with them. About some there is at 

 present unanimity of opinion, but in other cases diverse views 

 are held. These points we shall indicate as far as we can, 

 though, owing to the fact that no very detailed lists of 

 comparable localities have been published by Messrs. Tate and 

 Dennant, it is possible that their views may not always be 

 correctly represented. The list we give is practically that 

 published by one of us (G. B. P.) in the Repni't of the Brisbane 

 Meeting of the Austr.ilasian AssociHtion for the Advancement of 

 Science in 1S95. 



