CORALS FROM THE DEVONIAN FORMATION. 219 
alternate mode of superposition. Great diagonal of the calices about half a line; the 
tabulz are placed at about one tenth of a line apart. 
Found in the Devonian formation at Torquay; in Spain at Contejo de Castrillon, 
near Aviles; in America at Caledonia, New York, at the Falls of Ohio, at Charleston 
Landing (Indiana), in the Isle of Mackinaw, and, according to Mr. Hall, at Williamsville, 
Erie county. Found also in the superior Silurian deposits at Springfield, Ohio, and in 
Perry county, Tennessee. 
The genus Emmonsia contains two other species—#. alternans' and L. cylindrica.” 
The first differs from the species here described by the alternate arrangement of the mural 
edges, by the incomplete tabule being more regular, and by its calices being larger. 
E. cylindrica has calices still larger, and often circular ; it is also characterised by the 
existence of four or five lines of pores on each side of the walls. 
3. Genus ALVEOLItES, (p. Ix.) 
1. ALVEOLITES suBoRBICULARIS. Tab. XLIX, figs. 1, la. 
ALVEOLITES SUBORBICULARIS, Lamarck, Hist. des Anim. sans Vert., vol. ii, p. 186, 1816; 
2d ed., p. 286. 
= BSCHAROIDES, Lamarck, Hist. des An. sans Vert., vol. uu, p. 186, 1816; 
2d ed., p. 286. 
Escuarires sponaitus, Schlotheim, Petrefactenkunde, Ist part, p. 345, 1820. 
ALVEOLITES SUBORBICULARIS and EscHAROIDES, Lamouroux, Encyel. (Zooph.) pp. 41, 42, 
1824. 
CALAMOPORA SPONGITES, var. TuBEROSA, Goldfuss, Petref. Germ., vol. i, p. 80, tab. ii, 
fig. la—h, 1829. (Cet. excl.) 
ALVEOLITES ESCHAROIDEA and SUBORBICULARIS, De Blainville, Dict. Sc. Nat., vol. lx, p. 269, 
4 1830.—Manuel, p. 404. 
sponaiTEs, Steininger, Mem. de la Soc. Geol. de France, vol. i, p. 334, pl. 20, 
fig. 4, 1831. 
CaLAMOPORA = — Morren, Descr. Cor. in Belg. Rep., p. 74, 1832. 
FavosIvtEs — Phillips, Paleeoz. Foss., p. 16, pl. vi, fig. 23, 1841. 
CALAMOPORA SUBORBICULARIS, Michelin, Icon., p. 188, pl. 48, fig. 7, 1845. 
_ SQUAMOSA or IMBRICATA, ibid., p. 189, pl. xlix, fig. 15, 1845. 
FAVOSITES SUBORBICULARIS and ALVEOLITES TUBEROSA, D’Orbigny, Prod. de Paleont., 
vol. i, pp. 107, 108, 1850. 
ALVEOLITES — Milne Edwards and Jules Haime, Pol. Foss. des Terr. Paleeoz., 
p. 255, 1851. 
Corallum composite, forming irregular incrustated masses, which are in general fixed 
on ramose favosites or on a cyathophyllum, and are composed of superposed layers, 
1 Milne Edwards and Jules Haime, Pol. Foss. des Terr. Paleeoz., p. 248, 1851. 
2 Favosites cylindrica, Michelin, Icon., p. 255, pl. lx, fig. 1, 1846. 
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