116 PROP. p. MA-RTTN DUNCAS'S BEVISION Or THE 



G-enus Ainsoc(ENiA, Beuss, Foss. Korallen von der Insel Java, 



'JSTovara ' Expedition^ p. 166. 

 Colony in stumpy or finger-shaped masses. Calices irre- 

 gularly shaped and sized, surrounded by coenenchyma, on which 

 the margins are raised and often grooved. Columella none. 

 Septa unequal, some very thick and others very thin, entire, non- 

 exsert, feebly granular. Coenenchyma cellular, apparently of 

 exotheca forming the ends of feeble costse. Endotheca well 

 developed, oblique, and uniting the ends of the larger septa around 

 the axial space. G-emmation extracalicular. 

 Distribution. — Fossil. Eocene: Java. 



G-enus Heteboc(E]S"IA, Milne-Edwards Sf Jules Uaime, Hist. 

 Nat. des Corall. vol. ii. p. 282 (1857). Illustrated by Eeuss, 

 Denkschr. der Wien. Akad. der "Wiss. t. vii. pi. 10 (1854). 



The colony is convex and gibbous, or dendroid. The corallites 

 are united by an abundant coenenchyma formed of mural expan- 

 sions and exothecal dissepiments. The calices are distant, cir- 

 cular, and projecting. There is no columella. Septa exsert 

 and well developed ; but there are never more than 12, and 

 often only 6, and they are unequal, there appearing to be three 

 simple systems of them. 



Distriliotion. — Fossil. Cretaceous : Europe. 



G-enus Elasmoc(ek"ia, Milne-Edwards Sf Jules JSaime, Hist. 

 Nat. des Corall. vol. ii. p. 279 (1857) . Illustrated by Michelin, 

 Icon. Zooph. pi. 51. fig. 3 (1845), as Oculina explanata. 



Colony convex, more or less massive, or sublamellar. Coral- 

 lites wide apart, and united by mural expansions which are 

 granulated and feebly striated where free, and which are formed 

 by layers of vesicular exotheca or coenenchyma. The walls are 

 thick ; the septa are irregular and very granular. There is 

 neither columella nor pali. Calices circular or subellij)tical. 

 Costae feebly developed. 



Distribution. — Fossil. Cretaceous : Europe. 



VIII. Alhance ECHINOPOROIDA. 



Massive, budding, rarely fissiparous Astrseidse, foliaceous. Corallites 

 short, united by an echinulate coenenchyma. Septa spinulose, 



Genus Echinopora (pars), Dana. 

 Genus Acanthopora, Verrill. 

 Genus Physophyllia, Duncan. 



