BESCEIPTION 



THE BRITISH FOSSIL CORALS. 



CHAPTER VIIL 

 CORALS FROM THE PORTLAND STONE. 



The most recent Oolitic Formations appear to contain very few corals. We have 

 seen only three species which can, with any degree of certainty, be referred to the conti- 

 nental deposits belonging to this gronp, and but one British species. The former were 

 found in strata which are considered as corresponding to the Kimmeridge Clay, and we 

 are not aware of any having been met with in that Formation in Great Britain. The 

 latter is contained in the Portland stone, and appears to be peculiar to that upper portion 

 of the superior Oolite. 



Family ASTREIDiE, (p. xxiii.) 

 Genus Isastrea. 



ISASTREA OBLONGA, (Tab. XII, fig. I, la, \h, \c, Id.) 



CoRALLOiDEA COLUMNAIUA, etc., Parkinson, Org. Remains, voL ii, p. 60, tab. vi, figs. 12, 13, 



1808. 

 SiLiciriED COKAL, W. Conyheare and IF. Phillips, Outlines of the Geol. of England and 



Wales, p. 176, 1822. 

 LiTHOSTROTiON OBLONGUM, Fleming, British Animals, p. 508, 1828. 

 Madrepoka, silicifieu, E. Benett, Catal. of the Organic Remains of the County of ^Yilts, 



p. 7, 1831. 

 AsTREA TiSBURiENSis, Fitton, On the strata below the chalk; Geol. Trans., 2d series, vol. iv, 



p. 347, 1843. 

 LiTHOSTROTiON OBLONGUM and AsTREA TISBURIENSIS, Morris, Cat. of Brit. Fossils, pp. 31, 



40, 1843. 

 Isastrea oblonga, Milne Edwards and J. Haime, Polypiers Fossiles des Terrains Palaeoz., 

 etc. Archives du jMuseum, vol. v, p. 103, 18.51. 



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