10 BRITISH FOSSIL CORALS 



irregular ; and although there are six septa which reach nearer the calicular centre than 

 the others, still no cyclical development can be asserted to have existed. There are 

 sixteen septa ; three are rudimentary, and there are thirteen of a larger size. 



Height of corallum, f'^ths inch. 



Long diameter of calice, f^ths inch. 



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



The paucity of septa and the shape distinguish this remarkable species. 



6. MoNTLiVALTiA BREvis, Diincati. PI. VIII, figs. 8, 9. 



The corallum is short and cylindrical, and has a base as broad as the calice. 



The calicular margin is sharp, and the calice is rather irregular in shape : the calicular 

 fossa is shallow, and the septa are few in number. 



The septa are unequal, distant, stout, and have a large tooth at the internal end. This 

 dentation is more distinct in the secondary and tertiary cycles than in the primary. 

 There are three cycles of septa, but the third is incomplete. The primary septa are the 

 longest, and reach to the central space, whilst the smallest septa end in a blunt knob, 

 not so near the central space as the termination of the intermediate septa. 



Height of the corallum, ^ih. inch. 



Breadth of the calice, \ inch. 



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



The septa are very characteristic of this short and widely based Coral. 



7. MoNTLiVALTiA PEDUNCTJLATA, Duncmi. PI. II, figs. 12, 13; PI. VIII, fig. 16. 



The corallum is large above, cyhndro-conical midway, and finely pedunculate at the 

 base. 



The epitheca is thin, rather but finely ridged transversely, and permits the costae 

 which are small to be seen where it is veiy scanty. The calice is not symmetrical, and 

 the septa are numerous, and apparently constitute five cycles, and part of a sixth. The 

 peduncle is much smaller than the body of the corallum. 



Height of corallum T=j,ths inch. Width of the calice ^ths inch. 



Locality. In the Sutton Stone, and at Brocastle. In the Collection of Charles 

 Moore, Esq., F.G.S., and in the Museum of Practical Geology, London. 



The shape and high septal number distinguish this species. 



