•44 Proceedings of the Royal Society of Victoria. 



contemporaneous age. I am inclined to adopt the latter opinion, 

 and to think that the basalt has flowed north-westward into the 

 deep estuary, and filled it up almost completely except on the 

 southern edge. It was probably prevented from occupying the 

 indentations of the Botanical Gardens lagoon and South Yarra 

 valley by the jutting points of Silurian rocks which occur at the 

 •eastern sides of their oulets, as may be seen by reference to the 

 map with the former paper. These points have doubtless 

 deflected the flow towards the north. The outlet to Port Phillip 

 was probably not closed for some time later, and in the meantime 

 brackish water fauna occupied the locality near the Anderson 

 Street bridge, as shown by the shells specially mentioned herein. 

 — 7.vi.02]. 



Narrow arms of the estuary, similar to this of the Yarra, 

 formerly existed along the Moonee Ponds Creek and the 

 ^Saltwater River. In the former locality marine shells have been 

 found, ^ and the estuarine deposits probably extended up to the 

 vicinity of Flemington Road Railway StatioA. On the Saltwater 

 River in all probability they reached the foot of and even beyond 

 the semi-circular ridge in the Flemington Racecourse, occupying 

 the whole of the "Flat" in this reserve. 



At the Botanical Gardens the old estuary appears to have had 

 fairly steep banks. For most of -the way from its eastern side, 

 and round its northern end past Kensington and to Footscray, 

 the margin of the estuary consisted of more or less steep 

 banks and clifls, while on going to the south-west towards 

 Williamstown these clifts vanish, and the shore is low, and slopes 

 gently inland. 



In close proximity to the place where the marine shells occur, 

 along the Moonee Ponds Creek, a portion of the jaw of 

 Diprotodon australis, Owen, has been found, as recorded" by Mr. 

 Piitchard, and though the nature of the deposits containing the 

 shells, and their relation to the sandy clay in which the bone was 

 found are not stated, yet it appears as if they are contempo- 

 raneous deposits. Mr. Pritchard has evidently so regai'ded them, 

 and is of opinion that they are of Pleistocene age. 



1 Pritchard, G. B.: On tlie Occurrence of Diprotodon australis, Owen, near ilelbourne 

 — I'roc. Roy. See. Victoria, vol. xii., n.s., pt. i., 1899. 

 - L(jc. cit. 



