CORALS FROM THE SILURIAN FORMATION. 283 



Lithodendron c^espitosdm, Ch. Morren, Descr. Cor. Belg., p. 47, 1832. (Not Goldfuss.) 

 Cyathophyllum vermiculare, Hisinger, Leth. Suec, p. 102, pi. xxix, fig. 2, 1837. 



— articulatum, Ibid., p. 102, pi. xxix, fig. 4. 



— c^espitosum, Lonsdale, Sil. Syst., p. 690, pi. xvi, fig. 10, 1839. (Not 



Goldfuss.) 



— dianthus (pars)? Lonsdale, Ibid., pi. xvi, fig. 12e (Ccet. excl.) (Not 



Goldfuss.) 



— c^espitosum, Eichwald, Sil. Syst. in Esthland, p. 203, 1840. 



— — If Orbigny, Prodr. de Paleont., vol. i, p. 47, 1850. 

 Strephodes craigensis, M'Coy, Ann. and Mag. of Nat. Hist., 2dser., vol. vi, p. 275, 1850. 



— — M'Coy, Brit. Palseoz. Foss., p. 30, pi. i c, fig. 10, 1851. 



Cyathophyllum articulatum, Milne Edwards and Jules Haime, Pol. Foss. des Terr. 



Palseoz. (Arch, du Mus., vol. v), p. 377, 1851. 



Corallum composite, fasciculate ; corallites closely set, subcylindrical, tall, presenting 

 numerous prominent accretion ridges, and covered with a thin epitheca, through which 

 the costse are apparent. Calices circular, shallow. Septa about sixty in number, thin, 

 equally developed, and somewhat closely set. Gemmation often very distinctly intra- 

 calicular ; the young corallites remain cylindrical, and rise side by side without uniting. 

 The tabulae are small, and irregularly placed. The lateral vesicles are almost as high 

 as broad, and rather irregular in size. The septa are well developed. 



Wenlock, Dudley. Craig Head near Girwan, Ayrshire (M'Coy) ; Gothland and Russia. 



Specimens in the Collections of the Geological Society, of Mr. Fletcher, Mr. J. 

 Gray, &c. 



This species resembles C. caspitosum 1 and C. aquiseptatam? by the mode of aggregation 

 of its corallites ; but differs from them by the great development of its accretion ridges. 

 In that respect it much resembles C. Zoveni, 3 in which the costse are thicker, and the 

 septa more unequally developed. 



We are inclined to think that the Cladocora sulcata of Mr. Lonsdale* is only a 

 variety of the species in which the accretion ridges are less prominent. It was found 

 at Benthall Edge, and, according to Professor M'Coy, at Ferriter's Cove and Dingle, 

 in the county of Kerry. 



The fossils described by Professor M'Coy under the name of Cyatliophyllum caspitosunf 

 appear also to belong to this species, and were found at Ardaun, Cong, in the county of 

 Galway ; Chair of Kildare, Kildare, in the county of Kildare ; Doonquin, Dingle, in the 

 county of Kerry ; Portrane, Malahide, in the county of Dublin. 



1 See tab. li, fig. 2. 



3 See tab. lii, fig. 2. 



3 See tab. Ixvi, fig. 2. 



* Silur. Syst., p. 692, pi. xvi bis, fig. 9. 



5 Silur. Foss. of Ireland, p. 61, 1846. 



