52 BRITISH FOSSIL CORALS 



Epitheca thick, ridged, and extending to the cahcular border. 



Cahee circular, ordinarily concave, shallow. 



Septa usually thin, granular ; strongly toothed on their arched margins. 



Five cycles, the first three nearly equal. 



This Coral varies greatly in its height and basal flatness. It may be sub-turbinate, or 

 even discoidal ; and the specimen from Bottesford, in Lincolnshire, is flat below and very 

 convex above, but it presents an axial depression. The Continental specimens appear to 

 be found in a lower horizon of the Lias than that in which the specimen figured in PI. XII 

 was found. 



Locality. Bottesford, Lincolnshire. 



In the Collection of Rev. T. C. B. ChamberHn, F.G.S. 



There are specimens, which I beUeve are young forms, that were found at Fenny 

 Compton and Aston Magna. PL XII, figs. 6 and 7. 



There is a microscopic Coral at Willsb ridge, in the Lima-series (PI. XV, fig. 9), 

 but the species is not distinguishable. It is figured, as perhaps a larger form may be 

 discovered. Small and young Montlivaltice are very common on Gryphsese and on large 

 Corals. 



Family— ASTRvEIDiE. 



Division — Faviace^. 



Genus — SEPTASTUiEA . 



1. Septastr^a Eveshami, Duncan. PI. XIII, figs. 5 — 7. 



The corallum is large, tall, and flabelliform, and the surface is subgibbous. The 

 base is small, and the corallites radiate and elongate rapidly. 



The calices are very irregular in shape and size, and many are twisted and irregular ; 

 all are shallow, and those which are fissiparous are narrow. Some calices are polygonal, 

 but fissiparity can be distinguished in most. 



The septa are small, dentate, and very irregular in size and arrangement. There are 

 between thirty and forty septa in regular calices, but in the elongated there are many 

 more. The calicular wall is very thin, but where it has been worn a groove is noticed. 

 The endotheca is rather scanty. 



Diameter of a polygonal calice ^ths inch, and of elongated calices from y^th to xljths inch. 



Locality. Evesham. 



In the Collection of the Rev. P. B. Brodie, F.G.S. 



