262 BRITISH FOSSIL CORALS. 



2. Genus Alveolites (p. lx). 



1. Alveolites Labechei. Tab. LXI, figs. 6, 6a, 6b. 



Favosites spongites (pars), Lonsdale, in Murchison, Silur. Syst., pi. xv bis, figs. 8, 8a, 86 



(cset. excl.), 1839. (Not Calamcpora spongites, Goldfuss.) 

 Calamopora spongites, Eichwald, Sil. Syst. in Esthland, p. 197, 1840. 

 Alveolites Labechii, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz. (Arch, 

 du Mus., vol. v), p. 257, 1851. 



Corallum massive, convex or subgibbose, very closely resembling the Alveolites 

 suborbicularis 1 of the Devonian formation ; but differing from it, by the calices being more 

 irregular, scarcely prominent, with very thin edges, and subtriangular, and by the inner 

 process being very indistinct. Large diameter somewhat more than one third of a line ; 

 small diameter one third less. 



Found in the upper Silurian deposits at Wenlock, and at Benthall Edge. Professor 

 M'Coy 2 mentions its existence at Doonquin, Dingle, and Ferriter's Cove, in the county 

 of Kerry ; Egool and Bellaghaderreen, in the county of Mayo ; River Chapel and Gorey, 

 in the county of Wexford. According to Eichwald, it exists also in Russia. 



Specimens are in the Collections of the Museum of Practical Geology of London, of 

 the Parisian Museum, of M. Bouchard-Chantereaux at Boulogne. 



2. Alveolites Grayi. Tab. LXI, figs. 2, 2a. 



Alveolites Grayi, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz. (Arch, 

 du Mus., vol. v), p. 258, 1851. 



Corallum presenting a flat or submamillose surface. Calices very irregular, inclined 

 in various directions, in general subtriangular, and having their outer margin somewhat 

 arched. The elevation situated on the inner surface of this inferior calicinal edge in 

 general distinct, but not very prominent. Walls rather thick. Size of the calices : large 

 diameter about half a line, small diameter one third less. 



Upper Silurian rocks of Wenlock and Dudley. Specimens in the Collections of the 

 Museum of Practical Geology, of Mr. J. Gray of Dudley, and of the Museum of Paris. 



This species much resembles Alveolites suborbicularis* and A. Labechei, 4, but its calices 

 are always larger, and limited by walls that are thicker in proportion to the size of the 

 corallites. 



1 See tab. xlix, fig. 1. 2 Synopsis of the Silurian Fossils of Ireland, p. 64. 



s See tab. xlix, fig. 1. i See tab. ]xi, fig. 6. 



