TRIASSIC PLANT REMAINS IN A SHALE BED NEAR MANLY. 379 
With regard to the horizontal extension of the shale bed, I 
find the rocks at Freshwater Point have decidedly a dip of 4° in 
the direction W. 40° S., that the rocks at Curl Curl Head to the 
south have a dip in the direction slightly north of west, and that 
the rocks at Deewhy Head have a dip almost the same as those 
at Freshwater, both in direction and inclination. Consequently 
the shales should outcrop on Deewhy Head but not at Curl Curl 
Head, and this I find to be the case. At Deewhy they are some- 
what altered in character, being much more arenaceous than those 
at Freshwater. 
At Curl Curl Head, although the shale bed is not to be seen 
yet traces of plant remains are to be found, and probably Olean- 
dridium and other forms may occur above the geological horizon 
of the shale beds at Freshwater Point. 
Between Freshwater Point and Deewhy Head occurs a large 
lagoon, and when visiting the locality I was struck with the idea 
that perhaps the existence of this lagoon may in some measure be 
due to the presence of these soft shales. On studying the question 
Iam convinced that not only does the lagoon owe its existence 
to the shale bed, but that also the contour of the coast line in 
this locality has been influenced by it. A visit to the spot will 
show that both marine and subaerial denudation has taken place 
—that the sea in the past has made encroachments where the 
soft shales dip below sea level south of Freshwater Point, and 
that streams have eaten away the shales to just below sea level, 
between the Point and Deewhy Head, and that the wide channel 
formed has been closed, and is now being gradually filled up by 
the accumulation of deposits of blown sand and alluvial. 
Mr. Etheridge has kindly undertaken to work out and describe 
the plant remains, and his results will be published subsequently. 
Provisionally his classification of the different forms is as follows: 
Macroteniopteris wianamatice (Feist.) 
Oleandridiwm, sp. nov. 
Phyllotheca, sp. non det. 
(2) Podozamites. 
