12 Proceedings of the Royal Society of Victoria. 



the foraminifera persisted during the time required for the 

 deposition of the first few feet of the clay. The muddiness 

 of the water, however, was apparently inimical to the growth 

 of polyzoa in the profusion in which they had previously 

 existed, and they soon ceased to be the typical forms of life 

 in the locality, and the o-astropods made their appearance in 

 greater numbers. The effect of the variation in the sediment 

 on the fauna has been alluded to when dealing with the 

 section near the viaduct. 



The section is as follows : — 



Basalt ... ... ... ... 60 ft. 



Incoherent sandy matei-ial, with con- 

 cretions ... ... ... 20 ,, 



Yellow clay, with concretions ... 50 ,, 



Grey clay ... ... ... 20 „ 



Polvzoal limestone ... ... 30 ,, 



Total ... 180 ft. 



The hill side is covered by. a fairly deep soil, but in a few 

 places, especially where rabbits have buiTOwed, the under- 

 lying rock is exposed. Fossils are scarce, but by dint ot a 

 few hours' careful searching, we succeeded in securing 

 examples of thirty-live species, which will be found recorded 

 in the list given. 



Below Madden's, the river valley widens out to about three- 

 quartei-s of a mile. The bed of the stream is formed by the 

 polyzoal limestone for a distance of about half a mile below 

 the section just described, and the rock is carved into 

 miniature caves and hollows by the stream. The top of 

 the limestone approaches the level of the river as we go 

 down stream, owing to the dip of the beds, and at last it 

 disappears under the bed of the stream, its place being taken 

 by the overlying gre}^ clay. Just above Griffin's (see })lan 5). 

 wliere the clay liist makes its appearance in tlie river bed, 

 fossils are plentiful. 'J'he banks of the stream are steep 

 and slippery, so that it is a matter of some difficulty to work 

 at the beds. The top of the clay bed is only about a couple 

 of feet above tlie summer level of the river, and its eroded 

 sui'face is covered by a gravel wash some ten or twelve feet 

 in thickness. 



The fossils found here were remarkable for their size, being- 

 far larger than examples of the same species occurring 



