CORALS OF THE CRAG. 9 
The corallites penetrate almost perpendicularly to the surface of the celleporous mass, 
and, when isolated from this extraneous body, present the appearance of small, subturbinate 
cylinders, the walls of which are covered with a thick epitheca; there is no trace of costz 
visible, and the epitheca forms round the calice a small exsert rim. The cadlice is 
circular, and its fossula large, but not deep. The colwmella is well developed, papillose, 
and not projecting, nor is it placed exactly in the axis of the visceral chamber, the septa 
being more developed on one side of the corallite than on the other. The septa of 
different orders are nearly equal in size, and do not form well-characterised systems ; they 
vary in number from sixteen to twenty, and consequently must belong to three cycla, the 
first two of which are probably complete, and the third developed only in two or four of 
the six systems normal in all Astreidee. It is also to be noted, that all these septa are 
very thin excepting near the wall, closely set, slightly bent inwardly, and terminated by an 
oblique edge, armed all along with strong dentations, the size of which increases towards 
the columella. A few large granule are seen on the lateral surfaces of the septa, and the 
loculi are divided by very thin dissepiments, placed at a distance of about two thirds of a 
line from each other. 
The length of these corallites, when adult, is about four lines; the diameter of the 
calice, one line and a half; and the depth of the fossula, two lines. 
Cryptangia parasita’ of the Faluns of Touraine, is very nearly allied to the above- 
described species, but differs from it by the small dimensions of its calices, and the 
constant existence of eight principal septa. 
Cryptangia Woodii is found in a good state of preservation in the Coralline Crag at 
Ramsholt. Specimens which appear to belong to the same species, but are not well 
preserved, are met with in the Red Crag of Sutton. 
These fossils are to be seen in the collections of the Geological Society of London, 
and of Messrs. Searles Wood, Bowerbank, D’Archiac, and Milne Edwards. 
Family EUPSAMMID& (p. li). 
Genus BALANOPHYLLIA (p. ln). 
BaLaNoPHYLLIA caLycuLus. ‘Tab. I, figs. 3, 3a, 34, 3c, 3d. 
R. C. Taylor, Mag. of Nat. Hist. vol. iti, p. 272, fig. D, 1830. (Very 
rough figure.) 
BALANOPHYLLIA CALYcULUS, Searles Wood, Ann. of Nat. Hist., vol. xiii, p. 12, 1844. 
— a. Milne Edwards and Jules Haime, Annales des Scien. Nat., 
vol. x, p. 84, 1848. 
Corallum simple, cylindrico-turbinate, adherent by a large basal surface, erect, and in 
general not very tall. The walls, of a spongy tissue and rather thin, are covered in most 
1 Lithodendron parasitum Michelin Icon. Zooph., pl. Ixxix, fig. 3. 
