22 BRITISH FOSSIL CORALS 



The costse are highly developed, and cover the ccenenchyma, which is also spiny 

 between the costal ends. Nearly all the costse are equal ; they are straight in some places 

 and wavy in others, but all are strongly dentate and well marked. 



The columella is small. 



Three calices occupy about \ inch in length. 



Locality. Brocastle. In the Collection of Charles Moore, Esq., F.G.S., Bath. 



10. AsTRoccENiA DENDROiDEA, Bimcan. PI. IX, figs. 9, 10. 



The corallum is in small branches, with blunt extremities. 



The ccenenchyma is highly developed and plain. 



The calices are wide apart in some places, but close in others ; they are shallow, small, 

 and more or less circular. 



The septa are very irregular in their number, and their costal ends are club-shaped 

 and rounded. 



The columella is small. 



The branches rarely exceed \ inch in length. 



Locality. Brocastle, and at Ewenny. In the Collection of Charles Moore, Esq., 

 E.G.S., Bath. 



11. AsTRoccENiA MiNUTA, Duncan. PI. IX, figs. 18, 19, 20. 



The corallum is large, flat, and thin. It is more or less encrusting in its habit. 



The calices are very small, rather deep and close : they are more or less circular in 

 outline, and are separated by a small quantity of ccenenchyma. 



The septa are usually twenty in number, and many of them have a paliform tooth close 

 to the columella. The costse are small. 



The columella is small. 



Locality^ Brocastle. In the Collection of Charles Moore, Esq., F.G.S., Bath. 



12. AsTROCCENIA SiNEMURIENSIS, V Orb., Sp.^ 



The corallum is in the shape of a rounded mass, which is formed of superimposed 

 layers. The calices are small, and tolerably regularly polygonal. The columella is stout, 

 and projects. The septa are rather thick, unequal, and slightly close. There are twenty 



* Martin, op. cit., pi. vii, figs. 26, 27. 



