74 ON THE TERTIARY DEPOSITS OF AUSTRALIA, 
yellow sandy ad full of marine fossils. They cst pm 
small Turrite T. Warburtoni, mthi, and other Ther 
nothing Dicstivee to lead one to suppose that the siivtcl was “40 
deposited at the same time as the shells. It may have ee 
earried out to sea — a flood from some coast stream, or it m 
have been dropped into the sea by a bird of prey. There it Ties 
however, firmly imbedded among the fossils, a land animal among 
marine shells. I was not able to ascertain whether the remairis 
At Portland, ari’ on thers bes limit of Victoria, we have 
a commencement of a newer tertiary — known as the 
Mount Gambier or Polyzoan limestone. It is e different in 
character from the lower strata we have pti considering, and 
has been fully described in two publicatioris of m i 
—viZ., 
ze case Observations in South Po leyrias ‘aud 23 Tico Lovole 
Por i in the 
refer to some features which wa ve “ar been oeeg noticed. 
First of Pa ‘the deposit is is Set gruel by the abundance of 
Peet 
scarce, except one urchin. This is Lovenia Forbesii (Woods and 
‘Dunean).* This lies on strata a few inches thick, with no other 
fossil, showing how curiously they must have flourished in the 
days of their existence. Now that we have the deep-sea dredging 
as a guide in estimating the conditions of — at great — on 
the ocean floor, we cee: understand what w see here. Some- 
times the dredge of « Challenger” woul « come up full of one 
kind of echinide, as fa there was nothing else to be found. Here 
we see a similar thing in former times. There are also a few 
.* ‘This fossil urchin was first eel bes pes as Sion but ag 
The sa 
SG area UGS ia aly 1 Ue a ee ere 
