315 
nearly all the species still remaining in the Society’s collection. 
T also notice in the latter the following fossils, which do not 
seem to be included in Salter’s list, namely :—Phragmo- 
ceras, 1 sp.; Pleurotomaria, 2 sp.; Huomphalus, 1 or 2 sp.; 
Orthis, 1 or 2 sp.; Rhynconella, 1 sp.; Corals, several species, 
It is also worthy of record in this place that I have 
obtained fragments of a limestone rock similar in character to 
that of the Gordon and Point Hibbs from the New River, 
immediately to the south of the Craycroft, among which 
is the well preserved remains of a coral allied to the genus 
Strombodes. 
Before any more specimens are sent away from the 
Society’s collection for description or identification, I submit 
that it is most desirable to obtain detail descriptions of the 
larger collections classified already in the hands of European 
authorities or in European collections. With this end in view, 
and to aid me in dealing more satisfactorily with this subject 
in the work now under preparation by me for the Government 
of Tasmania, I had some time ago requested Mr. Robert 
Etheridge, jun., to furnish me, if possible, with full descrip- 
tions and figures of the species already referred to as 
containedin Bigsby’s Thesaurus Sil. When Mr. Etheridge 
supplies this most necessary information, we will be all the 
better prepared to select for further determination such 
fossils still in the Society’s collection as may have not 
been already described. To send away another typical 
collection at present would deprive local workers of the only 
source of reference available to them,and at the same time, 
as regards the greater number of species, only duplicate 
specimens already at the command of Eurepean authorities. 
In the meantime, to facilitate reference to the species 
contained in the Society’s collection, and to aid others who 
may not be in possession of works of reference, I have in the 
following part of my paper, with one or two exceptions, given 
a full description of all the genera which have been referred 
to in this paper as contained in the Silurian limestones of the 
Gordon River, in Tasmania. Prof. McCoy may, if applied 
to, be able to throw some light as regards the species identi- 
fied by him in the collection submitted to his judgment by 
Mr. Gould about the year 1866. 
DEscRIPTION OF CERTAIN GENERA FOUND Fossil IN THE 
Srrurtan Limestone oF THE WESTERN PART OF 
TASMANIA. 
Class Bracuropopa, (Spiriferid.e ) 
Retzia, King, 1850. 
Bigsby’s Thes. Sil. 1868; Eth. Cat. Aust. Fossils, 
Ps. Lry ons itp. oA 
Shell punctuate, Terebratula shaped, beak truncated by a 
