684 APPENDIX I. 
The Harper’s Hill specimens so closely resemble some varieties of the Spirifer glaber, 
especially the Sp. oblata of Sowerby, that I believe the whole should be referred to that 
widespread species, which occurs among the carboniferous rocks of Russia and other 
parts of Europe and Britain, and also less abundantly in the Devonian ; also in our own 
Western States. Verneuil refers to Van Diemen’s Land as one of its localities. 
Spirifera subradiata, G. Sowerby, in Darwin’s Voleanic Islands, London, 1844, p. 159. 
Spirifer subradiatus, J. Morris, in Strzelecki’s New South Wales, London, 1845, p. 281, plate 
15, fig. 5, pl. 16, figs. 1—4. 
Spirvfera subradiata, M’Coy, Ann. and Mag. Nat. Hist., 1847, xx. 233. 
Spirifer glaber, Sowerby, Min. Conchology. For its synonymy see the recent works, L. de 
Koninck’s Desc. des An. Foss. Belg., Liége, 4to., 1842, p. 267, and Verneuil and Keyserling’s 
Paleontology of Russia, 4to., p. 144. 
6. SprrireR Darwinut (J. Morris).—Plate 1, fig. 7 a, cast, with internal spiral sup- 
port in view. 
Glendon, New South Wales. 
Morris’s specimens were also from Glendon, The species is transversely oval. 
Height of cast 1:4 inches; length 1,33, H.; thickness 743, H. The coste are four on 
either side of the mesial fold, the outer obsolescent, the others large and rounded. The 
mesial lobe is divided by a furrow. 
Figure 7 6, appears to be the same species, and represents a broken right-hand valve. 
It is close like Morris’s Spirifer Hawkinsii from the Falkland Islands, and the species 
may be identical. 
Spirifer Darwin, J. Morris, in Strzelecki, op. cit., p. 279. 
Spiifer Hawkins, ibid., in Quart. Journ. Geol. Soc., ii. 276, pl. 11, figs. 1 a, 1 6. 
Spwifera paucicostata[?], G. Sowerby, in Darwin’s Volcanic Islands, p. 160. 
Spirifera Darwinu, M’Coy, loe. cit., p. 233. 
7. Sprrirer puopecicosratus (M’Cov).—Plate 2, figs. 1 a, 1 6, different views, 
natural size. 
District of Illawarra. : 
This species appears to be the Sp. duodecicostata of M’Coy. It is near the Darwiniz, 
but has five large coste either side of the mesial fold. M’Coy mentions Muree and 
Wollongong as its localities, Height of one specimen 1,5 inches; length 1:49 H. 
(1,8 in.); thickness ;7°, H. A smaller specimen is 1/5 inches in length. The mesial 
fold is divided. The coste are smooth and rounded, with transverse lines of growth 
towards the lower margin. 
Spirvfera duodecicostata, M’Coy, loc. cit., p. 234, pl. 17, figs. 2, 3. 
8. SPrrIFER Plate 2, fig. 2, natural size. 
Black Hill, Nlawarra, and Glendon on the Hunter. 
In the characters and number of plications, the specimens of this small and rather 
thin species, agree with Koninck’s acuticostatus, found in the carboniferous system of 
Belgium. (Desc. des An. Foss. p. 265, pl. xvii. figs. 6 a, b,c.) The specimen here 
figured is imperfect, and does not show all the outer coste. The coste are seven 
to nine on either side of the mesial fold; they are acutely triangular and prominent, and 
the lower margin of the shell is in consequence neatly dentate. ‘The mesial fold is tri- 
