284 BRITISH FOSSIL CORALS. 



5. Cyathophyllum truncatum. Tab. LXVI, figs. 5, ba, bb, be. 



FuNGiTiE octo majores, &c, Magnus Bromel, Acta Liter. Suec, vol. ii, p. 465, 1728. 

 Porpitarum plurium, &c, Ibid., pp. 466 and 467, figs. 1 — 5, 1728. 

 Madrepora composita, &c, Foufft, Amsen. Acad., vol. i, p. 93, tab. iv, fig. 10, 1749. 

 Fungites, Thomas Pennant, Phil. Trans., vol. xlix, 2d part, pp. 514 and 516, tab. xv, figs. 



6 and 12, 1757. 

 Madrepora truncata, Linne, Syst. Nat., edit. 10, p. 795, 1758. 



— — Linne, Fauna Suec, p. 536, 1761. 



— — Linne, Syst. Nat., edit. 12, p. 1277, 1767. 

 Strombodes truncatus, Schweigger, Handb. der Naturg., p. 418, 1820. 

 Madreporites truncatus, Wahlenberg, Nov. Act. Soc. Upsal., vol. viii, p. 97, 1821. 

 Strombodes truncatus, Eichwald, Zool. Spec, vol. i, p. 188, 1829. 

 Floscularia corolligera, Ibid., p. 188, pi. xi, fig. 4. 



Strombastr^ea truncata, Be Blainville, Diet, des Sc. Nat., vol. lx, p. 342, 1830. — Man., 



p. 376. 

 Caryophyllia explanata, Hisinger, Anteckningar, vol. v, p. 129, tab. viii, fig. 9, 1831. 



— — Hisinger, Leth. Suec, p. 101, tab. xxviii, fig. 13, 1837. 

 Cyathophyllum dianthus, Lonsdale, Sdur. Syst., p. 690, pi. xvi, figs. 12, 12s? {Ccet. excl.), 



1839. (Not Goldfuss.) 



— — var. prolifera, Eichwald, Silur. Syst. in Esthland, p. 200, 1840. 



— truncatum, Bronn, Index Pal., vol. i, p. 370, 1848. 



— subdianthus, IfOrbigny, Prodr. de Pal., vol. i, p. 47, 1850. 

 Strephodes vermiculoides, M'Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. vi, p. 275, 



1850. 



— — M'Coy, Brit. Palseoz. Foss., p. 31, pi. i b, fig. 22, 1851. 

 Cyathophyllum truncatum, Milne Edwards and Jules Ilaime, Pol. Foss. des Terr. Paleeoz, 



(Arch, du Mus., vol. v), p. 379, 1851. 



Corallum composite, forming a tall turbinate mass, the basis of which is occupied by 

 the parent coralhte, and the upper surface is convex, and occupied by calices that vary very 

 much in size, and are generally free at their edges, but sometimes meet, and become 

 partially soldered together. Gemmation exclusively calicinal. Corallites regularly 

 turbinate, not very tall, and narrow at their basis. Walls covered with a very thin 

 epitheca, and presenting numerous strongly marked accretion ridges. Calices circular, or 

 deformed by the pressure of the neighbouring corallites, and terminated by thin, slightly 

 everted edges. Central fossula large, and rather deep; outer part of the calice almost flat. 

 Septa (50 or 60) very closely set and thick, towards the circumference, but rather 

 thin towards the centre, rather unequal in length alternately ; the largest reaching to the 

 centre. The internal structure of the corallites very dense. The tabula are small, and not 

 very distinct exteriorly from the regular dissepiments that divide obliquely the interseptal 

 spaces. Height of the corallites 1 or 1^ inch; diameter somewhat less. 



It is found at Much Wenlock, and Benthall Edge, Ledbury, Haven near Aymestry, 

 and Wenlock Edge (Murchison) ; Portrane and Malahide, Dublin (M'Coy). Sweden 

 and Russia. 



