124 



PKOP. P. MAETIN BTJNCAIf's REVISIOT^" OF THE 



being near the columella. Endotheca well developed. Epitheca 

 thin and complete. 



Distribution. — Fossil. Oligocene : India (Sind). Miocene : 

 Europe. — Becent. Indian Ocean, Eed Sea, Pacific, Australian 

 seas, West Indies. 



The genua Metastrcsa, Milne-Edwards and Jules Haime, Hist, 

 Nat. des Corall. vol. ii. p. 525, cannot be considered in the light 

 of a genus when contrasted with Prionastrwa. The only distinction 

 is one of growth, and in Metastrcea the walls are compact in 

 their whole height. This compactness is seen in portions of 

 species of Prionastrcea. 



Metastrwa is absorbed in Prionastrcea. 



Genus PLACASTEiEA, Stoliczlca^ Gretaceous Corals of Southern 

 India, Palceonto graphic a Indica, vol. iv. (4) 1873, p. 33, 

 pi. vii. fig. 1. 



Colony massive, convex. Corallites united by their walls, 

 which are fused. Calices irregularly disposed, close, polygonal, 

 separated by ridges. Columella lamellar, solid, with a finely 

 granulated upper edge. Septa numerous, close, finely denticulate 

 and granular, confluent over the narrow calicular wall. 



Distribution. — Fossil. Cretaceous of Southern India. 



This genus resembles Isastrcea, but there is the addition of a 

 lamellar columella. The method of increase is not given by 

 Stoliczka ; but it certainly was not fissiparous, as in LamellastrcBa, 

 Duncan. 



Grenus Eltsaste^ea, Laube, ^^Faune der Schicht. von St. Cassian,''^ 

 Denies, der Kais. Akad. der Wiss. Wien, 1864, Bd, xxiv. 

 p. 261. 



Colony csespitose, subplane above, composed of corallites 

 springing from a base of greater or less width, united by their 

 walls or by costae to a certain extent high up. Calices irregular 

 in shape, usually united to their neighbours by a broad surface. 

 Columella rudimentary or spongy. Septa unequal, flexuous, 

 serrate. Endotheca abundant. Gremmation within the calices. 

 Epitheca exists. 



Distribution. — Fossil. St. Cassian deposits : Europe. Infra- 

 Lias : England. 



