54 PEOF. p. MAETiif Duncan's revision op the 



Subgenus Leptomitssa, d'' AcJiiardi, Monogr. der VicenteniscJien 



Korallen. 

 (Quoted by A. E. Eeuss, Pal. stud, uber die alt. Tertiarsch. 

 der Alpen, II. Abtheil., Wien, 1869, p. 24.) 



Corallum variable in sbape, often cylindro-conical, compressed, 

 with large costge, which are crested and spined. Epitheca scarcely 

 developed. Septa double, very numerous and mostly equal. 

 Endotheca abundant. There is no columella. 

 Distribution. — Fossil. Eocene : Europe, Asia. 



Subgenus Oppelismii/IA, Duncan, Brit. Foss. Corals, Supp. 

 pt. iv. no. 1, p. 39 (1867). 



Corallum simple, attached, conical. Calice shallow. Columella 

 absent. Septa numerous, close and unequal. The epitheca is 

 well marked, and reaches the calicular margin. Gemmation 

 occurs within the calice, and the bud has au epitheca. 



Distribution. — Fossil. Lias: Ireland. Oolite: England, Europe. 



Milaschewitsch has described some of these forms as Montli- 

 valticB, and considers the gemmation only a rejuvenescence, which 

 it is not. The coral he describes as Montlivaltia turbata shows 

 two buds from the calice, and is one of the subgenus. 



Subgenus Ceeatophtllia, (genus) K. v. Fritsch, " Foss. Korall. 

 d. Numm. v. Borneo,^^ PalcsontograpMca, Supp. Band iii. 1878. 

 This is a Montlivaltia with paliform lobes. 

 Distribution. — Fossil. Eocene : Borneo. 



Genus Eeddenia, Duncan, Fossil Corals and Alcyonaria of Sind, 

 Pal. Indica, ser. xiv. pt. 2, p. 36 (1880). 



The corallum is simple, free, with an irregularly-shaped base, 

 which has enclosed a foreign body. Calice usually constricted, 

 crowded with uniting dentate septa, ending in paliform lobes. 

 Columella absent. Costge not directed to the sharp end of the 

 base, but passing straightly and parallel down the sides of the 

 wall, sometimes keeled. Epitheca, when it exists, variable, and 

 often in broken mosaic or granular. Endotheca scanty. Granules 

 of the septa unite here and there, forming false synapticula. 



Distribution. — Fossil. E-anikot group. Eocene : Sind. 



II. Alliance PLACOSMILIOIDA. 



Simple corals, with entire or denticulate septa. A lamellar columella. 

 Endotheca in variable quantity. Epitheca present or absent. Without pali. 



