218 BRITISH FOSSIL CORALS. 
Silurian deposits at Storderley Edge (Upper Ludlow Rocks), Larden, and, according to 
Mr. Lonsdale, at Churn-bank, on Palmer’s Kairn near Ludlow; in Ireland, according to 
Mr. M‘Coy, in numerous localities of the counties of Galway, Kerry, Wexford, Kildare, 
Mayo, Tyrone, Waterford, and Wicklow; in Russia at Waschkina (according to 
Keyserling) ; in America at Casskill, and at Lexington, Kentucky (Goldfuss). Found in 
the inferior Silurian deposits at Landovery. 
We are inclined to think that it is by mistake that Professor M‘Coy mentions this 
species as having been met with in the carboniferous formation in Ireland, and presume 
that the fossil so alluded to by that geologist was the Alveolites septosa. 
The above-described species is easily distinguished from all the other species of 
Favosites by the smallness of its calices. It resembles /. alveolaris’ and F. aspera’ by 
the angular position of its mural pores; but these two species differ from it by the calices 
being much more irregular in size, as well as much larger. 
We have not remarked any material difference between the specimens found in the 
Devonian and the Silurian formations; but all these corals are so ill-preserved, that we 
are not inclined to attach much importance to that supposed specific identity. 
2. Genus EMMonsia. 
Emmonsra HEMIspHERICA. Tab. XLVIIL, figs. 4, 4a. 
Fayvosires ALvEouartis, Hall, Geol. of New York, p. 157, No. 31, figs. 1, la, 1843. (No. 8 
of Blainville.) 
FavosItEs HEMISPHERICA, Fandell and Shumard, Contrib. to Geol. of Kentucky, p. 7, 1847. 
ALVEOLITES HEMISPHERICA, D’Orbigny, Prod. de Paléont., vol. i, p. 49, 1850. 
FAVOSITES HEMISPHERICA, Jules Haime and Verneuil, Bull. Soc. Geol. de France, 2d ser., 
vol. vii, p. 162, 1850. 
EMMONSIA HEMISPHERICA, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palzoz., 
p. 247, 1851. 
Corallum composite, forming a subspherical mass, which becomes sometimes very tall, 
and composed of superposed layers. Ca/ices irregular, polygonal, and varying in size. 
Septa (12) well developed, straight or slightly curved, and extending to the centre of the 
upper tabule. Mural pores large, placed at about a quarter of a line apart, and arranged 
in pairs on some of the sides of the wall, but forming single lines on others. Zubule very 
closely set, somewhat irregularly horizontal. In the visceral chambers, where they are 
broken down, they leave fragments adhering to the walls; and in general, above the space 
included between two of these fragments, a third fragment exists, so as to constitute an 
1 Calamopora alveolaris (pars), Goldfuss, Petref. Germ., t. i, pl. xxvi, figs. la, le, 1826. 
2 Calamopora alveolaris (pars), Goidfuss, ibid., tab. xxvi, fig. 10. 
3 Milne Edwards and Jules Haime, Monographie des Polyp. Foss. des Terr. Palzoz.; Archives du 
Museum, vol. v, p. 246, 1851. 
