182 BRITISH FOSSIL CORALS. 



This species differs from all the other corals belonging to the same generical division 

 by the great extent of the tabulae, and in that respect much resembles Amplexus and 

 Campophyllum ; it may possibly in reality appertain to this last-mentioned genus, which 

 bears to Cyathophyllum similar relationship as Amplexus does to Zaphrentis, but the 

 specimens which we have had an opportunity of examining were not in a state of pre- 

 servation sufficiently perfect to enable us to ascertain whether the smooth appearance of 

 the tabulae was due to the absence of septal prolongations or the accidental destruction of 

 their radii. 



6. Cyathophyllum ? pseudo-vermiculare. 



Cyathophyllum pseudo-vermiculare, M'Coy, Ann. and Mag. of Nat. Hist., 2d Series, 



vol. iii, p. 8, 1849. 



— — — Milne Edwards and Jules Haime, Pol. Foss. des 



Terr. Palseoz., p. 388, 1851. 



— — — M'Coy, Brit. Palseoz. Foss., p. 86, pi. iii c, 



fig. 8, 1851. 



"Elongate, cylindrical, flexuous; surface very irregularly annulated or transversely 

 nodular, coarsely striated longitudinally (about six striae in one fourth of an inch) ; branches 

 averaging from half to three fourths of an inch in diameter; small cylindrical branches 

 project at distinct irregular intervals from the sides ; internal structure; — central area, 

 rather more than half the diameter of the tube, defined, composed of flat, slightly un- 

 dulated transverse septa, bent downwards at the end, bearing at their circumference a 

 series of from 24 to 27 very short, equal, rather distant, radiating lamellae, not reaching 

 half way to the centre ; interval between this inner area and the walls filled with loose 

 cellular structure, formed of little more than a single row of large vesicular curved plates, 

 highly inclined upwards and outwards. Not uncommon in the lower carboniferous lime- 

 stone of Kendal, Westmoreland ; (a variety also occurs in the lower carboniferous lime- 

 stone of Kiltullagh, Roscommon, Ireland)." (M'Coy, op. cit.) 



7. Cyathophyllum dianthoides. 



Cyathophyllum dianthoides, M'Coy, Ann. and Mag. of Nat. Hist., 2d Series, vol. iii, p. 7, 



1849. 

 — — Milne Edwards and Jules Haime, Polyp. Foss. des Terr. 



Palseoz., p. 390, 1851. 

 _ _ M'Coy, Brit. Palseoz. Foss., p. 85, pi. iii c, fig. 7, 1851. 



Corallum compound, forming wide conical masses, increasing by calicular gemmation, 

 and very proliferous (from 8 to 16 young corallites rising sometimes from one parent 

 calice). Corallites conico- cylindrical. Septa numerous, (96 or 100,) thin, straight, cre- 

 nulate, and somewhat unequal in extent alternatively. Tabula large, nearly horizontal, 



