198 BRITISH FOSSIL CORALS. 



far from the wall. Tabula placed at about half a line apart, almost horizontal in the centre, 

 but becoming almost erect near the edge. Diameter of the Calices 4 or 5 lines ; diameter 

 of the smooth portion of the tabula 1 line. 



Found at Rugley, Oswestry, Corwen; according to Prof. Phillips, at Ribblesdale, 

 Teesdale, Ashfell, Bristol, and in Northumberland ; according to Martin, at Bakewell, 

 Winster, and Castleton; and, according to Prof. M'Coy, in Ireland. It is also met with at 

 Vise in Belgium. Specimens are in the collections of the Museum of Practical Geology, of 

 Prof. Phillips, Mr. Bowerbank, Mr. Stokes, the Paris Museum, &c. 



L. Martini differs from L. junceum, 1 L. irregulare? L. antiquum? L. harmodites, 4, 

 and L. Stokesi? by the large size of its corallites, and their numerous septa. It is on the 

 contrary smaller than L. affine? which is multiradiate, and has numerous small and 

 regular vesicles in the interseptal loculi. L. Phillips? is the species nearest allied to the 

 above-described fossil, but differs from it by the columella being less compressed, and by 

 the frequent coalescence of the corallites. The other species of this genus, such as 

 L. aranea, 8 L. ensifer, 9 L. basaltiforme,™ L. PortlocM, 11 and L. M c Coyanum, 12 are easily 

 distinguished from L. Martini by the massive, astreiform structure of their compound 

 corallum. 



11. LlTHOSTROTION IRREGULARE. Tab. XLI, figs. 1, la, lb, lc, Id, le. 



Screw stone, Robert Plot, Nat. Hist, of Staffordshire, p. 195, tab. xii, fig. 5, 1686. 

 Madrepora, &c, Parkinson, Org. Rem., vol. ii, pi. vi, fig. 8, 1808. 

 Caryophyll^ea, Conybeare and W. Phillips, Geol. of England and Wales, p. 359, 1822. 

 Caryophyllia fasciculata, De Blainville, Diet. Sc. Nat., vol. lx, p. 311, 1830. Man. 



d'Actinol, p. 345. (Not Lamarck.) 

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



Lithodendron irregulare, John Phillips, Geol. of Yorkshire, vol. ii, p. 202, pi. ii, 



figs. 14, 15, 1836. 

 Cladocora irregularis, Morris, Cat. of Brit. Foss., p. 33, 1843. 



Lithodendron fasciculatum, Portlock, Rep. on Londonderry, p. 335, 1849. (Not Phillips.) 

 Lithodendron irregulare, Portlock, Rep. on Londonderry, p. 336, 1849. 

 Lithodendron pauciradiale, M'Coy, Syn. Carb. Foss. of Ireland, p. 189, 1844. 

 Siphonodendron pauciradiale, M'Coy, Ann. of Nat. Hist., 2d series, vol. iii, p. 139, 



1849. 



I See tab. xl, fig. 1. 2 See tab. xli, fig. 1. 



3 Lithodendron cespitosum, Goldfuss, tab. iii, fig. 4 ; Lithostrotion antiquum, Milne Edwards and Jules 

 Haime, Polyp. Foss. des Terr. Palaeoz., p. 439. 



4 Milne Edwards and J. Haime, op. cit., tab. xv, fig. 1. 



5 Ibid., tab. xx, fig. 2. 6 See tab. xxxix, fig. 2. 7 See tab. xxxix, fig. 3. 

 8 See tab. xxxix, fig. 1. 9 See tab. xxxviii, fig. 2. 10 See tab. xxxviii, fig. 3. 



II See tab. xlii, fig. 1. 12 See tab. xlii, fig. 2. 



