164 PKor. p. MAETiK Duncan's eetision of the 



Grenus Episeeis, E. de Fromentel, Introd. <i V etude des Polyp, foss. 

 p. 123 (1859). 



Corallum tall, at first horizontal and then cylindrical. Epitheca 

 strongly developed and folded. Septa very exsert, finely dentate. 

 Columellary fossula very elongate. 



Distribution. — Fossil. Cretaceous : Europe. 



The typical species, Fpiseris macrostoma, is a very large coral, 

 and is not without its affinities with Podoseris, nobis. 



Group-Genus Gonioseris, Duncan. 



G-enus GtOnioseeis, Duncan, Pal. Soc, Supp. Brit. Foss. Gorah, 

 Ser. 2, Pt. iii. p. 21, pi. vii. (1872). 



Corallum simple and free. Base polygonal, projecting angles 

 formed by groups of costse ending in septa. Margin concave 

 between the angles. Centre of base concave. Costse numerous, 

 covering the base and converging in groups at each angle along 

 a line leading from a large septum to the centre. Tipper sur- 

 face convex, divided by masses of septa continuous with the 

 costse from the base of tlie angles. They are exsert externally, 

 and reach the axial space, where they meet. There is a large 

 prominent primary septum in each mass. The calicular wall is 

 not seen from without. Synapticula broad and numerous. 



Distribution. — Fossil. Inferior Oolite • England. 



2. Subfamily Loplioseridcd aggregated. 



I. Alliance CYATHOSERIOIDA. 



Colonial Lophoseridse, trochoid or depressed turbinate in shape. Com- 

 mon wall naked and costulate. Calices superficial, radiating, and with 

 confluent septo-costae. 



Genus Cyathoseris, Ed. & H. 



Genus Crateroseris, Tomes. 



Genus Thamnoseris, Etallon. 



G-enus Ctathoseeis, Milne-Fdwards Sf Jules Saime, Hist. Nat. 

 des Cor all. vol. iii. p. 59 (1860). 



Colony trochoid, adherent. Calices superficial and tolerably 

 distinctly radiating. Septa long, thick, granulate laterally and 

 confluent. Columella papillary or rudimentary. "Wall of the 

 colony naked and striated, and sometimes folded so as to 



