Reni cate te 
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ON THE TERTIARY DEPOSITS OF AUSTRALIA. 77 
the same geological horizon. aig completely, or almost co 
petals Pon the ee: veins, which are in true homblendie 
or dioritie dykes. e deposit olen widely iehiedk on Yorke’s 
Pe 
Weatwnca of these deposits we have the thick fossiliferous 
formation of the great Australian Bight, which extends for 300 
leagues in an unbroken wall, sbenttions on the ocean at heights 
ging from 300 to 600 feet, and all one mass of fossils. pi 
se ve ilar forms 
from Victorian or South Australian beds. I should imagine, 
from the description of the beds themselves, and the fossils 
submitted to me, that oft were nearer to the Mou A mpgatvinie 
i e river M 
slow and gradual upheaval would ¢ There is very strong, 
nay conclusive evidence, that the ean of the miocene period, or 
rather the dawn of the existing fauna, ushered in by exten- 
sive voleanic ance; and this, no doubt, ¢ 
changes of level and upheaval, f which was clearly sudden 
and extensive. It is difficult to interpret the facts in any other 
way. It seems to me pretty oi oe that the Heme 
central parts of the aay = _ rn Australia were almos 
suddenly upheaved from th 
I now append a few ioe on ithe Brachiopoda of the tertiary 
in Tasmania which has formed the subject of my inquiries for 
re 
submitted all the specimens to omas Davidson, Professor 
M‘Coy, and Professor Tate, and L append after each species their 
‘ks. 
c Rhynchonella caelata, M‘Coy MS. : Janie 9a trigonal, with a 
ne “From s 
miocene beds in Victoria.”—M‘“Coy. “A ae Beautiful species, 
very closely related to 2. nigricans, from New Zealand. 
in external shape cannot be distinguished, but I have not 
on any recent &. nigricans such prominent and strongly 
marked imbricated strie. The fold and sinus seems more strong. 
delica oe ans.” —T. Davidson. “ Aldinga, one 
axiockanaell a Profomsor 
