CORALS FROM THE MOUNTAIN LIMESTONE. 163 



the Isle of Man (Professor M'Coy) ; and Clogher and West Longfield, Tyrone (Colonel 

 Portlock). It is also met with at Olne in the province of Limbourg. 



Syringopora reticulata is remarkable for the small number of its connecting tubes, and 

 for the existence of a delicate transverse lamina which passes through the concentric in- 

 fundibula, and is shown by a transverse section of the corallum, (tab. xlvi, fig. la.) 



3. Syringopora geniculata. Tab. XLVI, figs. 2, la, and fig. 4. 



Tubipoka musica, affinis, Parkinson, Org. Rem., vol. ii, pi. i, figs. 1, 2, 1808. 



— catenata, Fleming, Brit. Anim., p. 529, 1828. (Not Martin.) 



— ramulosa, S. Woodward, Syn. Table of Brit. Org. Rem., p. 5, 1830. (Not Syring. 



ramidosa, Goldfuss.) 

 Syringopora geniculata, John Phillips, Geol. of Yorkshire, vol. ii, p. 201, pi. ii, fig. 1, 



1836. 



— — Portlock, Rep. on Londonderry, p. 337, pi. xxii, fig. 6, 1843. 

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



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



p. 291, 1851. 



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

 Harmodites geniculata, D'Orbigny, Prodr. de Pal., vol. i, p. 162, 1850. 



Corallites very long, diverging slightly towards their upper extremity, cylindrical, very 

 closely set, and surrounded with a thick, wrinkled epitheca. Connecting tubes numerous, 

 not appearing to have any regular mode of arrangement, placed at one line or one line and 

 a half apart, and in general very short, in consequence of an agglomeration of the corallites. 

 A horizontal section of a specimen transformed into a mass of marble, shows very distinctly 

 that the connecting tubes are hollow, and establish a free communication between the 

 visceral chambers of the connected corallites. Walls rather thick. Septa in general 

 fourteen in number, thin, equally developed, straight, not extending much towards the 

 centre of the visceral chamber, and not closely set. Length of the corallites in general 

 from 5 to 8 inches. Diameter about 1 line or somewhat less ; distance between these 

 usually half a line. 



This fossil has been found by the collectors of the geological survey at Kendal, 

 Westmoreland, and Professor Phillips mentions its having been met with at Ashfell and 

 at Mendip. Some young corals found at Oswestry, (Tab. XLVI, fig. 4), and differing from 

 the above-described specimens by the diameter of the corallites being smaller, appear to 

 belong to this species, which, according to Colonel Portlock, is also met with in Ireland, at 

 Derryloran, Erigal-Keerogue (Tyrone), and Crevinish, near Kesh (Fermanagh). Spe- 

 cimens are in the collections of Messrs. Phillips, Stokes, Bowerbank, &c. 



Syringopora geniculata is easily recognisable by the very slight geniculation of its very 

 closely set corallites and its numerous connecting tubes. 



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