42 BRITISH FOSSIL CORALS 



epithecal structures upon the natural classification of simple Corals, I do not think the 

 point sufficiently important to bring about the separation of Mr. Meyer's little Corals 

 from the TrochosmilicB. They form (^. e. the type and the variety) a sub-genus of the 

 Trochosmilics. 



Sub-family — Astr^inj;. 

 Division — Astr^ace^. 



Genus — Isastr^ea. 

 IsASTRiEA MoRRisii, Diincan. PI. XV, figs. 10 — 12. 



The corallum is flat and very short. The corallites are unequal, and usually five- 

 sided. 



There is no columella. 



The wall is thin. 



The septa are slender, unequal, and most of them reach far inwards. There are in 

 the perfect calices three cycles of septa in six systems. Usually some of the septa of the 

 third cycl^ are wanting. 



Breadth of a calice, rather more than yg^th inch. 



Locality. Bargate Stone, Guildford, Surrey ; with Terebratella Mttoni, Meyer. In 

 the CoUection of C. J. A. Meyer, Esq., F.G.S. 



This small Isasircea is usually found as a cast, and the restored drawing is taken from 

 an impression. The central circular structure is due to fossilization. 



The species is closely allied to Isastrcsa Guettardana, Ed. and H., of the Lower Chalk 

 of Uchaux. 



i?fem7y— FUNGIDiE. 



Sub-family — LoPHOSERiN.fi. 



Genus — Tijrbinoseris. 



Genus nov. — Turbtngseris. The corallum is simple, more or less turbinate, or 

 constricted midway between the base and calice. The base is either broad and adherent, 

 or small and free. 



