CORALS FROM THE MOUNTAIN LIMESTONE. 179 



of a vertical section, we had been misled by its external characters, and had placed it in 

 the vicinity of the genus Montlivaultia, under the generic name of Palceosmilia. 1 A 

 vertical section shows what are its real zoological affinities, and we do not think that this 

 fossil ought to be distinguished from the true Cyathopliylla, which correspond nearly to 

 the Strephodes of Professor M'Coy. 



C. Murchisoni differs from most of the simple species of the same generical division 

 by the smallness of its tabulae and the thinness of its septa. It much resembles 

 C. Wrighti? but this latter Coral is more compressed, harder, and has stronger septa. 

 It is also closely alluded to C. Stutchburyif which differs from it by the septa being 

 stronger and less numerous, and by having a rudimentary septal fossula. 



2. Cyathophyllum Wrighti. Tab. XXXIV, figs. 6, 6a. 



Cyathophyllum Wrighti, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz., 



p. 370, 1851. 



This species much resembles the preceding one, but the corallum is shorter, very much 

 compressed towards the calice, and bent near its basis only. Calice elongate in the 

 direction of the curve, flat near its edge, and with a narrow somewhat shallow central 

 depression ; proportion of the short and long diameter of the calice 100 : 200, or even 220. 

 Septa numerous, (at least 130,) somewhat unequal alternately, thin and straight, or slightly 

 curved inwardly. Height of the corallum 3 finches; calice: great diameter 2| inches; 

 short diameter 1 inch. 



Found at Frome, Somersetshire. Specimens are in the collections of Mr. Bowerbank 

 and of Dr. Wright (Cheltenham). 



The compressed form which exists in this species is very rarely met with in Cyatho- 

 phyllum. C. angustum* the transverse section of which is also oblong, is not bent at its 

 basis as C. Wrighti is, and its septa are not so closely set. 



3. Cyathophyllum Stdtchburyi. Tab. XXXI, figs. 1, la, 2, 2a, and Tab. XXXIII, fig. 4. 



Turbinolia fungites, Phillips, Geol. of Yorkshire, 2d part, p. 203, pi. ii, fig. 23, 1836. 



(Not T. fungites, Fleming.) 

 — expansa, M'Coy, Syn. Carb. Foss. of Ireland, p. 18G, pi. xxviii, fig. 7, 1844. 



Cyathophyllum expansum, jyOrbiyny, Prod, de Palseont., vol. i, p. 159, 1850. (Not 



Fischer.) 

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



p. 373, 1851. 



1 Comptes-rendus de l'Academie des Sciences, 1848, vol. xxvii, p. 467. 



2 See tab. xxxiv, fig. 6. 3 See tab. xxxi, figs. 1, 2 ; tab. xxxiii, fig. 4. 

 4 Lonsdale, in Murchison's Silurian Syst., tab. xvi, fig. 9. 



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