Invertebrate Fauna of the Hawkesbury-Wianamatta 
Series. 
T.-INTRODUCTTON. 
The remains of Invert el )i‘ata described in the present Memoir are from a 
series of beds of considerable thickness al)ove tlie productive Coal-]\teasures 
of New South "Wales. They a])pear divisible into four well-marked litho- 
logical subdivisions, and which, so far as at present known, are conformable 
with one another. Proeeeding from above downwards, the beds in ([uestion 
are — ‘ 
1. Wiana))iatta Shales, about 700 feet thick (Clarke). 
2. Ilawkeshurij Sandstone (Sydney Sandstone of Dana and dukes), 
about 1,000 foot thick (Wilkinson) . 
3. Narraheen Shales, about 050 feet thick (Baokl) . 
I. Estheria Shales, about 610 feet thick (Earid). 
Many good natural sections of the two iirst subdivisions are in existence, but 
the third and fourth liave chietly been investigated by moans of the Diamond 
Drill in Imrings made for coal. 
The prinoipal bores, and those more ]xirticularly referred to hereafter, 
are the following : — 
1. Moore Park Pore, about half a mile south of Baptist’s Gardens, 
Bourke-street, Surry Hills, Sydney ; depth, 1,800 feet. 
2. Botany Bore, on the Holt-Sutherland Estate, Port Hacking ; 
depth, 2,200 feet."^ 
3. Dent’s Creek Bore, on the Holt-Sutherland Estate, George’s 
Biver; depth, 2,307 feet.f 
1. Heathcote Bore, near Mount ’Westmaeott ; depth, 1,585 feet.:!; 
5. Liverpool Bore, George’s lliver, about miles south of Liverpool. 
0. Narraheen Bore, near Long Beef, north of Manly ; depth, 1,980 feet. 
* For .Journal, see Mineral Products, New South Wales, second edition, 1887, pi. 0. 
t For .Journal, see Annual Report, Department of Mines, New South Wales, for 1883 [1884], p. 197, and 
1880 [1887], p. 189. 
X For .Journal, see for 1885 [1886], p. 176. 
lift 124—88 C 
