230 BRITISH FOSSIL CORALS. 
Corallum composite, fasciculated, or astreiform ; tall; gemmations principally calicular. 
Corallites almost cylindrical, and presenting but slight growth swellings. Calices in 
general circular, sometimes agglomerated and polygonal; rather deep. Forty or fifty 
septa, somewhat unequal in size alternately, thin, narrow at the top, straight, and bearing 
a small paliform lobe near the centre of the calice. Diameter of the calices about 4 lines. 
Tabule well developed ; interseptal vesicles small. In horizontal sections of this corallum 
the spot where the dissepiments cease has the appearance of an inner wall, placed at a 
small distance from the exterior one. 
Found at Teignmouth Beach near Torquay, at Newton, and at Plymouth. 
Specimens are in the collections of Mr. Bowerbank and of Dr. Battersby. 
In a variety of this species found at Torquay, the calices are not more than 2 or 23 
lines in diameter. 
M. D’Orbigny has placed this coral in the genus Diphyphyllum of Mr. Lonsdale. As 
Professor M‘Coy very justly remarks, some specimens appear so distinctly dichotomous that 
they evidently belong to this division, whereas in other specimens the gemmation is quite 
lateral, as in the common Cyathophylla.' 
This species resembles C. marmini? by its general arrangement, being in some 
specimens fasciculate and in others astreiform; but in the latter fossil the calices are 
deeper, and the septa are not only less unequal, but also produce at their upper edge the 
appearance of an inner wall. ‘The same variations in the general form of the composite 
corallum is sometimes met with also in C. guadrigeminum,’ which, however, differs from 
C. cespitosum by the septa being still more slender, and not bearing any paliform lobes. 
11. CyatnopHynitum sBoLontense. Tab. LIT, figs. 1, 1a. 
MoNTASTREA BOLONIENSIS, Blainville, Dict. Sc. Nat., vol. lx, p. 339, 1830.—Man., p. 394. 
CYATHOPHYLLUM HEXAGONUM, Michelin, Icon. Zooph., p. 181, pl. xlvii, fig. 2, 1845. (Not 
Goldfuss.) 
LirHosTROTION ARACHNOIDES, D’Orbigny, Prod. de Paléont., t. i, p. 106, 1850. (Not 
Astrea arachnoides, de France.) 
CYATHOPHYLLUM BOLONIENSE, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palzeoz., 
p- 385, pl. 9, fig. 1, 1851. 
Corallum composite, astreiform, forming a subcircular rather flat mass. Calices 
polygonal, very unequal in size, deep, and separated by thin, straight walls. Forty-two or 
forty-six septa, almost equal in size, very slender, striated laterally, delicately denticulated, 
and straight ; half of them do not extend quite to the centre of the calice, the other 
1 It is surprising that after having recognized these variations the latter author should not have come 
to a similar result respecting the Diphyphyllum of the carboniferous formation which bear the same relation 
to Lithostrotions. 
2 Milne Edwards and Jules Haime, Pol. Foss. des Terr. Paleeozoiques, p. 386, pl. ix, figs. 2, 3, 1851. 
8 Goldfuss, Petref. Germ., t. i, p. 59, tab. xix, figs. 1, 5f, and tab. xvii, fig. 6, 1826. 
