Noimenclat'uve for Marine Tertiary Deposits. 77 



the local correlation of our beds and the elaboration of our sub- 

 divisions it seems to us advisable to employ local names for the 

 main subdivisions of our strata. This plan is of world-wide use, 

 and by its adoption we should be making no retrograde step, but 

 would be clearing the way for a detailed consideration of two 

 problems, namely the correlations of our strata between them- 

 selves, and a correlation with strata elsewhere. If the main 

 types have these names applied to them there will no longer be 

 any need to say whose views one is following, as we need to now 

 when speaking of certain beds as Eocene or Miocene. The 

 important question as to the relative position of the different 

 formations can be put on one side and need not be forced into 

 consideration in every line of a paper dealing with some small 

 local set of strata. 



Recognising then the advisability of such a change, it remains 

 to consider what are the principles which should actuate us in 

 our choice. These seem to be few and simple. Firstly, any 

 series of strata with a fauna differing appreciably in its con- 

 stituents from others should receive a distinctive name. Secondly, 

 the name should be taken from a locality where there is no 

 chance of confusion between the contents of beds of distinct ages. 

 Thirdly, we should not use names which are used in other parts 

 of the world as names of formations. In the fourth place, it 

 should be U!iderstood that the names given are given to a 

 particular set of strata and are irrespective of the correctness or 

 otherwise of the subsequent correlation of other beds with them. 



Bearing these provisos in mind we may consider their 

 application to our Tertiary strata and discuss the appropriateness 

 of the following names which we suggest. 



Wertikooiari. 



The Limestone Creek beds on the Glenelg River are in the 

 Parish of Werrikoo, in the County of Follett. They have been 

 I'eferred to Pleistocene and to Pliocene. There is another 

 Limestone Creek, near the head of the Murray, in Victoria, 

 which yields Palaeozoic fossils, and a third in the County of 

 Heytesbury, with Older Tertiary fossils. 



