288 BRITISH FOSSIL CORALS. 



the visceral chambers are occupied by large oblique vesicles. Height of the corallum 1^ 

 or 2 inches ; diameter of the calice often 3 inches or more ; depth almost 1 inch. 



Wenlock Edge, Benthall Edge, Dormington Wood,Wren's Nest near Dudley. Gothland. 



Specimens are in the Collections of the Geological Society of London, of the Museum 

 of Practical Geology, of the Bristol Museum, of Mr. Fletcher, Mr. John Gray, of M. 

 Bouchard- Chantereaux, of MM. de Verneuil, D'Archiac, &c. 



This species is easily distinguished from 0. subturbinata 1 and 0. Murchisoni? by its 

 short, cyathoidal form. It much resembles 0. grandis? in which, however, the calicular 

 margin is more lamellated, the septal fossulse less developed, and the interseptal spaces 

 filled with vesicles that are apparent exteriorly \s well as in the interior of the corallum. 



The fossil of the Silurian formation of 1. 'eland, which Professor M'Coy 4 refers to the 

 Cyathophjllum lurbinatum, Goldfuss, probably belongs to this species. It is found in 

 various localities of the counties of Galway, Kildare, Mayo, and Dublin. 



2. Omphyma subturbinata. Tab. LXVIII, figs. 1, la, lb, Ic. 



Madrepora simplex, turbinata, &c. (pars), Fougt, Amaen. Acad., vol. i, tab. iv, fig. 3 



{Cat. excl.), 1749. 



— turbinata (pars), Esper, Pflanz. (Petref.), tab. ii, fig. 4 ; tab. iii, fig. 5, 

 Turbinated madreporite, Parkinson, Org. Remains, vol. ii, pi. iv, fig. 1, and perhaps 



also fig. 3, 1808. 

 Turbinolia verrucosa and echinata, Hisinger, Anteckningar, vol. v, p. 128, pi. viii, 



figs. 5 and 6, 1831. 



— turbinata, var. verrucosa and echinata, Hisinger, Leth. Suec, p. 100, 



tab. xxviii, figs. 7&8, 1837! 

 Cyathophyllum turbinatum, Lonsdale, in Murchison, Silur. Syst., p. 690, pi. xvi, figs. 11, 



lla, 1839. 



— — Eichwald, Sil. Syst. in Esthland, p. 200, 1840. 



— subturbinatum, LfOrbigny, Prodr. de Paleont., vol. i, p. 47, 1850. 

 Caninia turbinata, M'Coy, Brit. Paleeoz. Foss., p. 28, 1851. 



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



(Arch, du Mus., vol. v), p. 401, 1851. 



Corallum tall, straight, or slightly bent at its basis, cylindro-turbinate, with a slender 

 peduncle, and presenting round its under half large radiciform appendices. Accretion 

 ridges of the wall in general well developed ; epitheca very thin. Calice circular, not very 

 deep ; its edge rather thick and not lamellated. Central smooth space of the upper tabula 

 small : septal fossulse smaller, and not as deep as in O. turbinata : septa (80) delicate, and 

 somewhat unequal alternately. A vertical section shows that the tabula? are very large, 



1 See tab. lxviii, fig. 1. 



-' See tab. lxvii, fig. 3. 



:i Miine Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz., p. 403, 1851. 



4 Syn. of Sil. Foss. of Ireland, p. 61, 1846. 



