CORALS FROM THE MOUNTAIN LIMESTONE. 161 



2. Beaumontia laxa. 



Columnarpa laxa, M'Coy, Ann. and Mag. of Nat. Hist., 2d Series, vol. hi, p. 122, 1849. 

 Beaumontia laxa, Milne Edwards and J. Haime, Pol. Foss. des Terr. Palseoz., p. 277, 1851. 

 Columnaria laxa, M'Coy, Brit. Palseoz. Foss., p. 92, pi. iii o, fig. 11, 1851. 



Corallites very long, sometimes free laterally, and cylindrical ; at other times, aggre- 

 gate and prismatical, or presenting some intermediate state between these two forms. 

 Epitheca strong, complete, and not showing any traces of the costal striae in the free state. 

 In the aggregate prismatic corallites, the transverse wrinkles of the epitheca become 

 thinner, and the straight, rather closely set costal striae are then very visible. The visceral 

 cavity or interior of the corallites is completely filled up with very large, irregular vesicles, 

 that are convex upwards, decline outwardly, and never form complete tabulae. 



Height, nearly 8 inches ; diameter of the corallites 4 lines. 



Found at Wellington, and in Derbyshire. Specimens are in the collections of the 

 Cambridge Museum, and of M. E. de Verneuil, at Paris. 



This Coral differs from the other species of Beaumontia, by the tendency of the 

 corallites to remain separate, or to coalesce but incompletely. By the entirely vesicular 

 structure of its endotheca, it approximates to B. vendor um^ in which species the corallites 

 are always basaltiform, and vary much in breadth. 



Sub -Family Halysitin^e, (p. lxi.) 

 Genus Syringopora, (p. lxii.) 



1. Syringopora ramulosa. Tab. XLVI, figs. 3, 3a, 33, 3c. 



Tubipora, Knorr and Walch, Rec. des Mon. des Catastr., vol. iii, p. 168, Supp., pi. 6 f> 



fig. 1, 1775. 

 Syringopora ramulosa, Goldfuss, Petref. Germ., vol. i, p. 76, pi. xxv, fig. 7, 1826. 



— — Morren, Descr. Corall. in Belg. repert., p. 69, 1832. 



— — John Phillips, Geol. of York, vol. ii, p. 201, pi. ii, fig. 2, 1836. 



— — Milne Edwards, Ann. de la 2e Edit, de Lamarck, vol. ii, p. 327, 



1836. 



— — Portlock, Rep. on Londonderry, p. 337, 1843. 



_ _ M'Coy, Syn. Carb. Foss. of Ireland, p. 190, 1844. 



Harmodites ramulosus, Eeyserling, Reise in Petsckora, p. 174, 1846. 



— — D'Orbigny, Prod, de Palaeont., vol. i, p. 162, 1850. 

 Syringopora ramulosa, Milne Edwards and J. Haime, Pol. Foss. des Terr. Palseoz., 



p. 289, 1851. 



— — M'Coy, Brit. Palseoz. Foss., p. 83, 1851. " 



1 Milne Edwards and Jules Haime, op. cit., tab. xvi, fig. 6. 



