212 BRITISH FOSSIL CORALS. 



extend farther from the cahce), becoming somewhat thicker in the wall, where they also 

 become unequal in size ; the larger ones do not appear to extend quite to the centre of 

 the visceral chamber, and show no traces of paliform lobes. Dissepiments very small. 

 Diameter of the wall about two thirds of a line. 



Found at Torquay by Dr. Battersby. 



This corallum differs from all the other species of the same genus by the small 

 dimensions of the calices and the considerable distance between them ; it is also remarkable 

 for the complete confluency of its costal radii. 



11. Genus Spongophyllum.^ 



Spongophyllum Sedgwicki. Tab. LVI, figs. 2, 2a, 2b, 2c, 2d, 2e. 



Spongophyllum Sedgwicki, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Pal., 



p. 425, 1851. 



Corallum composite, massive, astreiform. Calices polygonal, very unequal in size, 

 and circumscribed by pretty strong walls. No columella. Septal radii (14 or 16) extremely 

 slender, extending in general to a short distance from the centre of the visceral chamber, 

 slightly flexuous, and often not very distinct in the midst of the vesicidar tissue that fills 

 the cavity of the corallites. These septa alternate with an equal number of rudi- 

 mentary ones. 



A vertical section shows that the outer parts of the visceral chambers are occupied by 

 vesicles unequal in size, in general much elongated and rather irregular, but that in the 

 centre there are small horizontal tabulae. Diagonal of the large cahces 2^ or 3 lines. 



Found at Torquay. 



In the Collection of Dr. Battersby. 



This fossil is the only known species of our genus Spongophyllum, which is charac- 

 terized principally by the rudimentary state of the radial laminae ; these appear to form 

 slight ridges on the surface of the vesicles, but not to pass through them, and resemble 

 the costal system of the corals forming the genus Lonsdalia. 



12. Genus Syringophyllum, (p. Ixxii.) 

 Syringophyllum Cantabricum. Tab. LV, fig. 3. 



Phillipsastbea Cantabrica, Tie Vemeuil and Jules Haime, Bull. Soc. Geol. de France, 



2d ser., vol. vii, p. 162, 1850. 

 Syringophyllum? Cantabricum, Milne Edwards and Jules Haime, Pol. Foss. des Terr. 



Palaeoz., p. 451, 1851. 



1 Milne Edwards and Jules Haime, Pol. Foss des Terr. Palseoz. ; Archives du Museum, vol. v, p. 425, 

 1851. 



