200 BRITISH FOSSIL CORALS. 



12. Lithostrotion affine. Tab. XXXIX, figs. 2, 2a, 26. 



Madrepora, Knorr and Walch, Rec. des Mon. des Catastr., pi. lxi*, fig. 2, 17/5. 



— pectin ata, &c, Parkinson, Org. Rem., vol. ii, pi. vi, fig. 5, and perhaps fig. 9, 



1808. 

 Erismatolithus madreporites (affinis), William Martin, Petref. Derb., pi. xxxi, 1809. 

 Caeyophyllia affinis, Fleming, Brit. Anim., p. 509, 1828. 



— — De Blainville, Diet. Sc. Nat., vol. lx, p. 311, 1830; Man. d'Actin. 



p. 346. 



— — Woodward, Syn. Table of Brit. Org. Rem., p. 6, 1830. 

 Lithodendron affine, Keferstein, Nat. der Erdk., vol. ii, p. 785, 1834. 



— longiconicum and sociale, Phillips, Geol. of Yorkshire, vol. ii, p. 203, 



pi. ii, figs. 18, 19, 1836. 



— sociale and longiconicum, Portloek, Rep. on Lond., pp. 335-36, 1843. 



— affine and sociale, M'Coy, Carb. Foss. of Ireland, pp. 188-89, 1844. 

 Diphyphyllum longiconicum and sociale, WOrbigny, Prod., vol. i, p. 159, 1850. 

 Lithostrotion affine, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz., 



p. 437, 1851. 



Corallum fasciculate, dendroid. Corallites erect, cylindro-turbinate, very tall, giving 

 rise to many young individuals, which bend upwards immediately, often coalescent and 

 cemented together, and covered from top to bottom with a thin slightly wrinkled epitheca. 

 In the parts where the epitheca is worn away, the costae become visible, and are flat, closely 

 set, and equal in size. Calice circular, broad and deep. Columella compact, compressed, 

 and projecting in the centre of the calicinal tabulae in the form of a small crista. Septa 

 narrow and closely set ; the principal ones almost equal (30 or 32), alternating with almost 

 rudimentary ones, which do not articulate on the surface of the tabulae, are thin, and 

 appear to be denticulate. Tabula very closely set, convex towards the centre, but bending 

 upwards towards the circumference, simple, regular, and run through by the columella, 

 to which they are intimately united. The smooth part of their upper surface, on which 

 the septa do not extend, occupies somewhat more than one third of the diameter of the 

 corallum, which is about 5 or 6 lines. 



The specimens here described were found at Castleton. Professor Phillips mentions 

 the existence of this species at Kulkeagh mountain, Florencecourt, and Settle j according 

 to Martin, it is met with also at Winster, and, according to Colonel Portloek, at Derry- 

 loran and Kilcronaghan. Specimens are in the collections of Mr. Bowerbank, of the Paris 

 Museum, and of M. de Verneuil. 



This species is the largest of all the fasciculate Lithostrotions except L. eanadense} in 

 which the corallites are sometimes cylindrical and quite free laterally, and at other places 

 prismatic and completely cemented together, and in which, also, the centre of the calice is 



1 Milne Edwards and Jules Haime, Pol. Palseoz., tab. xiii, fig. 1. 



