492 NEW SOUTH WALES. 
they are equally thin throughout, not exceeding an eighth of an inch, 
and many are much thinner. No distinct leaves were observed. 
The fossil animal remains embrace a variety of genera, including 
some that have hitherto been considered as widely distant in geo- 
logical age. 
The whole number of species obtained by us is eighty-six, of which 
there are nine or ten of corals, two of Conularia, one of Theca, sixty- 
four of bivalve molluscs, and eleven of univalves. 
The corals pertain to the genera Favosites, Stenopora, Fenestella, 
and Hemitrypa (?). here are none of the Cyathophyllum family, 
and no other Radiata were observed either at Harper’s Hill or in Illa- 
warra, excepting some plates possibly of an encrinital character, 
which we have referred to the new genus Pentadia. Encrinital re- 
mains occur at Glendon. 
The Brachiopoda include species of Productus, Spirifer, Terebra- 
tula anda Lingula. Among acephalous molluscs, there are species of 
Pholadomya, (Allorisma,) Solecurtus (?), Astarte, Cardinia, Nucula, 
Cypricardia, Pecten and Avicula. There are also the genera Eury- 
desma and Pachydomus, instituted by J. D. Sowerby and J. Morris for 
New Holland fossils; and still other genera the author has found it 
necessary to introduce. 
All the species are peculiarly plain in their markings. It is also 
remarkable that they should pertain almost exclusively to genera in 
which the shells have no sinus to the palleal impression. The spe- 
cies referred to Pholadomya have the external characters of that 
genus; but the specimen, an external cast, does not show whether 
there was a palleal sinus or not. Neither can we say, from the 
specimens of the species referred to Solecurtus (?), that there was a 
palleal sinus. The genus Meonza, proposed by the author, contains 
species closely resembling the Myide in general appearance, and 
especially the Homomye@ (Agassiz), yet having a very strong entzre 
palleal impression, and belong to the family Astartide. 
The following catalogue gives the genera and number of species, at 
each of the three localities referred to. ‘The specimens of these loca- 
lities may generally be distinguished by the nature or colour of the 
rock accompanying them.* ‘Those of Harper’s Hill are calcareous fos- 
sils, and the rock has an olive green colour, generally appearing some- 
* T suspect that the localities of Strzelecki’s fossils are often given wrong in his work, 
as I made careful search at the localities, and the facts observed do not always corre- 
spond with his statements. 
