SANDSTONE BELOW THE COAL. 493 
what granular. Those of Glendon, seen by the author, have mostly 
a rusty ferruginous look, and the rock is somewhat schistose. Those 
of Illawarra occur in a dull bluish or dark grayish argillaceous sand- 
stone; or else in a rock of a light sandy aspect, a colour and appear- 
ance derived from partial alteration; and very many of the shells are 
contained in spherical concretions, as already described. 
The species of fossils of the different genera, are as follows :— 
From [npawarra.—2 of Pleurotomaria, 1 Natica, 2 Platyschisma, 1 Theca, 1 Lingula, 
2 Terebratula, 2 Productus, 5 Spirifer, 1 Solecurtus, 1 Cardium, 3 Pholadomya, (or Allo- 
risma,) 1 Astarte, 6 Astartila, 3 Cardinia, 1 Nucula, 4 Cypricardia, 7 Meonia, 1 Eury- 
desma, 1 Avicula, 1 Pecten, 1 Pterinea, 2 Cheetetes, 1 Pentadia (crinoidal?), 
From Harper’s Hirn.—3 species of Bellerophon, 3 Platyschisma, 2 Pleurotomaria, 
1 Conularia, 1 Spirifer, 1 Solecurtus, 1 Maonia, 1 Nucula, 2 Eurydesma, 2 Cypricardia? 
3 Pecten, 3 Pachydomus, 1 Cheetetes, 1 Hemitrypa ? 
From Gienpon.—1 Conularia, 1 Spirifer, 1 Astarte? 1 Pholadomya, 1 Cypricardia, 
5 Fenestella, 1 Nucula, 1 Avicula, and Encrinital remains of one or two species. 
No species of Harper’s Hill and Illawarra proved to be identical, 
excepting the Plewrotomaria Morrisiana and the Spirifer glaber. The 
Conularie are peculiar to Harper’s Hill, and the genus Theca was 
found only in Illawarra. The genus Pachydomus, (as properly re- 
stricted,) is confined to the former locality, and Cardinia, Productus, 
Terebratula, Cleobis, and Astartila to the latter. 
These differences, though based on our partial examinations, are 
too striking to be passed without remark. The Glendon fossils are 
also peculiar; of them, only a single Spirifer was found also in Illa- 
warra.* 
Age of the Coal Beds and the subjacent Sandstone-—The question of 
the age of these deposits is discussed with much learning and good 
judgment by Mr. J. Morris, in the work by Strzelecki. The car- 
boniferous character of the animal remains is obvious. ‘The transverse 
* According to Strzelecki, there are other species common to Illawarra and Harper’s 
Hill; but we may doubt his accuracy, for reasons already stated. We hesitate at receiv- 
ing all the facts regarding localities stated in M’Coy’s article. The ‘ Pleurorhynchus 
australis” he attributes to ‘sandy schists of Wollongong ;” whereas the Wollongong rock 
is not schistose, and we have the same fossil from Glendon, where the rock is ‘“‘a sandy 
schist.” On account of these uncertainties, we have not instituted a comparison between 
the statements of these authors and our own observations, although we believe in their 
general accuracy. 
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