22 BRITISH FOSSIL CORALS 



There is no columella, but the large septa and many of the small appear to unite over 

 the axial space. 



The synapticulae are not numerous, and are delicate. 



Height of corallum -j^ths inch. 



Extreme length 1^ inch. 



Locality. Millepore bed, Cloughton Wyke, near Scarborough. 



In the Collection of John Leckenby, Esq., F.G.S. 



2. Gonioseris Leckenbyi, Duncan. PL VII, figs. 6—9. 



The corallum is pentagonal. 

 The costse are thick. 



The concavity of the base is angular in outline. 



The septal masses at the angles are formed by small septa, which converge towards 

 the large costae. 



Height of corallum Yoths inch. 



Length l^jths inch. 



Locality. Millepore bed, Cloughton Wyke, near Scarborough. 



In- the Collection of John Leckenby, Esq., F.G.S. 



Genus nov. — Dimorphoseris. 



The corallum is compound, turbinate, and adherent. 



The epitheca is dense and faintly striated, but in no way incised or plicated. 

 The calicular surface is slightly concave and circular in outline. 



There is a large central primary calice, and one or more concentric rows of calices at 

 some distance from the primary. 



The septa are continuous and moniliform. 



There is no columella. 



The secondary calices increase by fissiparous division. 



1. Dimorphoseris oolitica, Duncan. PI. IV, figs. 1 — 4. 



The corallum is turbinate, and has a small peduncle and a large and slightly concave 

 calicular surface. 



The central calice is large, and about twenty-four septa enter into its composition, 

 but there are many others just outside. 



