328 
Geology of Sydney. 
showing crinoidal beds, 600 feet in thickness, is 
exposed, belonging to the Upper Marine Series. 
Nowra grits are best studied in a ycrtical cliff near 
the Nowra foot suspension bridge. Here they attain 
a thickness of 50 feet, but are much thicker between 
the Braidwood Road and the Wandrawandian Bore. 
Where the Nowra to Milton Road crosses Wan- 
drawandian Creek, outcrops of Wandrawandian 
sandstones are well developed. 
On the crest of the hill, opposite Mr. J. Arnold’s 
property, near Razorback, on the Southern Road, very 
fine stems of fossil plants occur, and on the descent 
towards Picton, near Mr. Apps’ house, good specimens 
of Thinnfeldia may be obtained by careful search 
some of them identical in character with those figured 
by Feistmantel. 
The stone from the railway cuttings on each side 
of Glenlee bridge yields a large variety of fragmentary 
plant remains, among which are representatives of the 
genera Sphenopteris, Pecopteris, Alethopteris , Tltinn- 
feldia/Twniopteris , Macrotceniopterw, Sagenopteris (?) 
Equwetum , Olozamites, Hymenophyllum, etc. There 
are also two species of Estheria , and the sheath wings 
of several species of Coleopteva, From a cutting on 
the N arell an-Li verpool Road, about one-and-a-quarter 
miles from the former place, in some of the ironstone 
bands elytra of Coleopteva are also associated with 
plant remains. At Pass Creek, near the bridge adjacent 
to the water-supply tunnel, A lethoptevis and other plant 
remains are obtainable. In the railway cuttings in 
