FAMILIES AND aElSrEEA OE THE MADEEPOKAEIA. 125 



G-enus LEProoPHyLLiA, Duncan, Brit. Foss. Corals, Pal. Soc. 



pt. iv. no. 2, p. 53 (1868). 

 Colony flat or tall, with corallites overlapping but joined by 

 their walls. Calices more or, less circular and deformed, widely 

 open. Columella absent. Septa dentate. Gemmation in the 

 centre of the calices. Epitheca distinct. Endotheca present. 

 Distribution. — Fossil. Jurassic : England. 



Tribe II. 



Genus Aploccenia, Milne-Edwards Sf Jules Haime, Hist. Nat. 

 des Gorall. vol. ii. p. 281, pi. D 3. fig. 1 (1857), more defined, 

 Colony thin, with a convex surface. Corallites united by their 



walls, and prismatic. Calicinal walls very thin, and in zigzags. 



Calices superficial, unequal, large. Axial space empty and small. 



Septa thick, unequal, straight, smaller internally, entire ; systems 



irregular. 

 Distribution. — Fossil. Eocene : Europe. 



XII. Alliance LATIM.EANDROIDA. 



Agglomerate Astraeidse, increasing by calicular gemmation. Calices 

 single or multiple, in valleys. Corallites united by their walls completely 

 or incompletely at the surface. Septa denticulate. Endotheca present. 

 Genus Latim^andra, Ed. & H. 

 Genus Hetkrogyra, Reuss. 



Genera absorbed: — Chorisastr^a, E, de From.; MiCRO- 

 PHYLLIA, d'Orb. ; Cormophyllia, d'Orb. 



Genus Latim^ajstdea, Milne-Edwards Sf Jules Uaime, Hist. 

 Nat. des Gorall. vol. ii. p. 543 (1857). 



Syn. MicropJiyllia, di Orh. ; Cormophyllia, di Ovb. ; Chorisastrcea, 

 E. de From. 



Colony massive, variable, convex, with a broad or narrow base, 

 or pedunculate or subturbinate, subplane, or subdendroid. 

 Corallites united by their walls, fusion not always perfect. 

 Calices some circumscribed, others in short series with their 

 centres distinct. Columella rudimentary. Septa numerous, thin, 

 close, laterally granulate ; dentations fine and subequal. Common 

 wall costulate, without epitbeca. Endotheca scanty. Gemma- 

 tion calicinal and submarginal. 



Distribution. — Fossil. Trias, Jurassic : Europe and England. 

 Cretaceous, Eocene : Europe. Eocene : Sind, Asia, and Borneo, 

 Miocene: Sind. 



