178 BRITISH FOSSIL CORALS. 



but we have been enabled to ascertain that this last-mentioned character exists in all true 

 Araplexus, and that no other organic peculiarity distinguish these from the typical form of 

 Cyathopsis ; we have, therefore, not adopted the new generical name proposed by 

 M. D'Orbigny and employed by Professor M'Coy. We must also remark that the latter 

 author places in the genus Cyathopsis, together with this Lophophyllum, two species of 

 true Zaphrentis, and we do not well understand on what grounds he has proceeded in so 

 doing, or how to interpret the apparent contradictory statements relative to the characters 

 of Cyathopsis, when Professor M'Coy, after having said " These corals differ from Caninia 

 (or Zaphrentis) in wanting the outer perithecal small vesicular area or lining of the walls," 

 adds that they differ " from Calophyllum, (which I only know by name,) by the vesicular 

 edge of the transverse plates between the lamellse at the walls," &c. 



Sub-Family CYATHOPHYLLIK/E, (p. lxvii.) 

 1. Genus Cyathophyllum, (p. lxviii.) 

 1. Cyathophyllum Murchisoni. Tab. XXXIII, figs. 3, 3<z, 3$. 



Pal^eosmilia Murchisoni, Milne Edwards and Jules Haime, Ann. Sc. Nat., 3 me serie, 



vol. x, p. 261, 1848. 

 Strephodes multilamellatum, M'Coy, Ann. and Mag. of Nat. Hist., 2d series, vol. iii, 



p. 5, 1849. 

 Cyathophyllum Murchisoni, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz., 



p. 369, 1851. 

 Strephodes multilamellatum, M'Coy, Brit. Palseoz. Foss., p. 93, pi. iiic, fig. 3, 1851. 



Corallum very long, sub-cylindrical, curved, very slightly compressed, and bearing 

 strong circular swellings placed at about 2 or 3 lines apart. Calice somewhat oval ; its 

 two diameters as 100 : 130, and its long diameter corresponding to the curve of the 

 corallum. Septa very thin, very closely set, almost equal, numerous (about 150), straight 

 or slightly bent, and reaching to the centre of the calice. A vertical section shows that 

 the tabula are very small and distant ; the vesicular dissepiments very small and almost 

 vertical, and the septa well developed. Height of the corallum, 7 inches ; great diameter 

 of the calice 2 inches, small diameter li inch. 



Found at Frome, Somersetshire; Tyn-y-castle, Clifton, and Mold. Professor M'Coy 

 mentions its existence at Arnside, Kendal, and Lisardrea, Boyle, Roscommon. 



Specimens are in the Collections of the Bristol Museum, the Museum of Practical 

 Geology, the Geological Society, the Cambridge Museum, Mr. Bowerbank, Mr. Stokes, and 

 the Museum of Paris. 



Before we were enabled to ascertain the internal structure of this Corallum by means 



