115 
In addition to the list now published there are one or two forms in this 
interesting material which are probably undescribed, but are held over for 
further examination. 
AIRE RIVER. 
The principal object of our visit to the Cape Otway district this 
year was to observe the leaf-beds and shell-deposits recorded by 
the Geological Survey near the mouth of the Aire River, the 
Kocenes at Point Flinders having been examined on a previous 
occasion. Mr. Wilkinson records a leaf-bed 17 feet thick a mile 
and a half west of the river-mouth, and below this again a clay 
bed with fossils similar to those at Cape Otway. Prof. Duncan 
specially mentions six species of corals obtained from the clay, 
amongst which are three gathered by us at Point Flinders, the 
remaining three not appearing in any of our collections from the 
locality. Moreover, the existence of synclines and anticlines in 
the strata is indicated in the report, and also in the section ac- 
companying it. 
The geological sketch map previously mentioned is not only 
more definite, but very considerably enlarges the area occupied 
by the tertiaries in the neighbourhood of the Aire River. Accord- 
ing to this map they extend uninterruptedly from the mouth of 
the river to Castle Cove, a distance of about three miles. No 
mere fringe on the sea beach is meant, as the coloring shows a 
width of fully a mile for the greater part of the distance. 
To our great disappointment we were unable to find any ter- 
tiary outcrop either on the sea beach or on the top of the cliffs 
adjoining the beach. We traversed the beach from the river 
to Castle Cove, and found it occupied by rugged dune limestone 
for the greater part of the distance, not only in fallen fragments, 
but am situ, with the same rock occasionally extending seaward 
for a short distance. At the western end, in the vicinity of 
Castle Cove, this was succeeded by mesozoic strata. Most cer- 
tainly the top of the cliffs should be marked Post - Pliocene 
(recent) dune limestone capped by sandhills, but although, as 
said before, we were quite unable to discover any trace of Mr. 
Wilkinson’s leaf or clay beds on the beach, it is, we admit, just 
possible that some such rocks may crop out beneath the dune 
limestone and become visible when the tide is very low. A guide, 
whom Mr. Robinson obligingly sent with us, professed to be able 
to find these clay beds, but after spending half the day in search- 
ing had to acknowledge himself puzzled, and offered the supposi- 
tion that they had been either washed away or covered with sand 
since he last saw them. 
From the existence of Eocene strata at Point Flinders, and 
also on the Ford River, close to the homestead, it is not unlikely 
that similar strata underlie the dune limestone on this part of 
