210 BRITISH FOSSIL CORALS. 



Till lately this singular fossil had been found only in the carboniferous deposits of 

 Tournay, in Belgium, but a specimen bearing the indication of Derbyshire was sent, 

 together with other fossils, to the Museum of Paris, by Lady Hastings. 



2. Genus Heteeophyllia, (p. lxxiii.) 

 1. Heterophyllia grandis. 



Heterophyllia grandis, M'Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. iii, p. 126, 



figs, a, b, 1849. 



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



p. 467, 1851. 



— — M'Coy, Brit. Pal. Foss., p. 112, pi. iii a, fig. 1, 1851. 



" Stem slightly flexuous, about 5 lines in diameter, scarcely tapering in 3 inches ; 

 longitudinally marked with deep unequal grooves, and few, large, polygonal, unequal 

 ridges, giving a very irregularly angulose section to the stem ; surface smooth ; horizontal 

 section, few, distant lamellae, destitute of any order of arrangement, but irregularly 

 branching and coalescing in their passage from the solid external walls towards some 

 indefinite point near the centre, where the few main lamellae irregularly anastomose. 

 Vertical section showing about the middle an irregularly flexuous line, (the edge of one or 

 two of the radiating vertical lamellae,) from which, on each side, a row of thin, distant, 

 sigmoidally curved plates extends obliquely upwards and outwards, forming a row of 

 large rhomboidal cells on each side. 



" Rare in the carboniferous limestone of Derbyshire." [M'Coy, op. cit.) 



2. Heterophyllia ornata. 



Heterophyllia ornata, M'Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. iii, p. 127, 1849. 

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



p. 467, 1851. 

 _ _ M'Coy, Brit. Pal. Foss., p. 112, pi. iii a, fig. 2, 1851. 



" Stems sub-cylindrical, long, flexuous, averaging one and a half lines in diameter, 

 with about sixteen narrow, sub-equal, longitudinal ridges, sharply defined, and separated 

 by flat spaces rather wider than the ridges they separate ; the ridges are set with small 

 round tubercles more than their own diameter apart ; surface very minutely granulose ; 

 internal structure as in the preceding species. Horizontal section, lamellae about fourteen 

 at the margin, (one usually coinciding with each external ridge). 



" Rather rare in the carboniferous limestone of Derbyshire." {M'Coy, op. cit.) 



