249 
A REVISION OF THE OLDER TERTIARY MOLLUSCA 
OF AUSTRALIA 
Part I. 
By Proressor RaupeH TATE. 
[Read September 5, 1899. ] 
In 1880, I commenced the publication of a series of essays on 
the Mollusca of the Older Tertiaries of Australia, still far from 
completion ; since that time many additional species have been 
obtained, a large number of which await diagnostic descriptions, 
other authors have occupied themselves with “she fauna, and my 
Opinions regarding some of the species have been changed as the 
result of fuller acquaintance with them and their related species. 
Taken altogether, it seems desirable to submit an up-to-date 
knowledge of the Molluscan constituents of our Older Tertiary 
faunas, so far, at least, as concerns those groups which have been 
systematically dealt with by me in the pages of these Transac- 
tions. 
The “ Revision” will consist of a list of admitted species 
under their revised generic and specific names, will include full 
references to additional species and diagnoses of new ones. The 
locality records will be given in full, these are based on specimens 
in the University Museum, Adelaide, for the great part, and on 
those that I have studied in other collections ; other records than 
these are indicated by the suffixed names of the authors 
responsible for their determinations. Synonyms are the result 
of a comparison of types or of well-authenticated examples, 
unless otherwise stated. The localities of the types are printed 
in distinctive type. 
The geological horizons admitted for the present are Eocene, 
Post-Eocene, and Miocene, as set forth more in detail in Trans. 
Roy. Soc., S:AlSV ols XOGELE. 5 pe) 97, 1899: 
The retrospective references under each.species will not extend 
beyond the respective essays of mine on which this Revision is 
based, as prior references, unless involving misrepresentations, 
are therein contained. The chief bibliography of !1ter date will 
be given under each class to WEE the publications indicated 
respectiv ely refer, | 
R 
