196 BRITISH FOSSIL CORALS. 



7. LlTIIOSTROTION (?) SEPTOSUM. 



Nemaphyllum septosum, M'Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. hi, p. 19, 1849. 

 Lithostbotion septosum, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz., 



p. 444, 1851. 



" Corallum of long, inseparable, slightly diverging, five or six-angled tubes, with an 

 average diameter of five lines. Vertical section : axis straight, thin, flat, three fourths of a 

 line wide • inner area composed of large, rather distant, slightly arched plates, each of 

 which generally extends across the entire area, so that one lengthened cell, (rarely more,) 

 reaches from one side to the other of this area, having the axis in the middle ; outer area 

 broad, of numerous, minute, much arched, vesicular plates, inclining obliquely upwards 

 and outwards, about four of the little cells in the oblique line from the inner area to the 

 outer wall. Transverse rough fracture showing the inner area to be composed of slightly 

 conical or cup-shaped plates, their diameter equal to that of the area, and pierced in the 

 centre by the flat persistent axis. Polished transverse section, radiating lamellae forty- 

 eight, thin, twenty-four of which reach the centre, while the intervening ones are nearly 

 marginal, not reaching half way to the inner zone ; interlamellar vesicular plates very 

 numerous and delicate in the outer zone, apparently absent in the inner zone. 



"Very common in the carboniferous limestone of Tullyard, Armagh, Ireland." {M'Coy, 

 loc. cit.) 



8. LITHOSTROTION DECIPIENS. 



Nemaphyllum decipiens, M'Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. iii, p. 18, 1849. 

 Lithostrotion decipiens, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Pal., 



p. 441, 1851. 

 Nemaphyllum decipiens, Ibid., Brit. Palaeoz. Foss., p. 99, 1851. 



According to Professor M'Coy, this coral is of the same size as L. irregulare, from 

 which it differs by its septa being straighter and its exterior vesicles much more oblique. 

 Found in the carboniferous limestone of Derbyshire. 



9. Lithostrotion junceum. Tab. XL, figs. 1, la, ~[b. 



Juncei lapidei, David Ure, Hist, of Rutherglen, p. 337, tab. xix, fig. 12, 1/93. 

 Caryophyllia juncea, Fleming, Brit. Anim., p. 509, 1828. 



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

 Lithodendron junceum, Keferstein, Nat. der Erdkorp., vol. ii, p. 785, 1834. 



— sexdecimale, Phillips, Geol. of Yorksbire, vol. ii, p. 202, pi. ii, figs. 11, 12, 



13, 1836. 

 Caryophyllia sexdecimalis, Be Koninck, Foss. des Terr. Carb. de Belg., p. 17, pi. d, 



fig. 4, 1842. 

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

 Lithodendron coarctatum, Portlock, Rep. on Londonderry, p. 336, pi. xxii, fig. 5, 1843. 



