Il2 PEOr. p. MABTIN DrNCAN*S REYISION OP THE 



Genus Cottvexastr^a, cVOrUgny, Note sur les Polyp, foss. p. 9 

 (1849). Illustrated by Milne-Edwards & Jules Haime, 

 Brit. Eoss. Corals, Pal. Soc. pi. 23. figs. 5 & 6, and Hist. Nat. 

 des Corall. vol. ii. p. 277 (1857). 



Colony convex, gibbous, or dendroid. Corallites united by 

 their well-developed costse. Tbe walls are cylindrical, and tbeir 

 calicinal margin is hidden by the septo-costse, which are few in 

 number, straight, exsert, and slightly granular. The septa are 

 few in number, continuous with the costse, and these last do not 

 all reach from calice to calice, and there is often an intercalicular 

 furrow. There is no columella. 



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

 Europe. 



Tribe II. 



Grenus Adelaste^a, Beuss, DenJcschr. der Wien. Akad. der Wiss. 

 t. vii. p. 115 (1854), correcting the name GonfusastTcea^ 

 d'Orb. ; and Milne-Edwards & Jules Haime, Pol. foss. des 

 Terr. pal. p. 98 (1831). 

 Syn. Confusastrcea, d'Orb. 



Colony massive, with a plane or convex surface. Corallites 

 intimately united by their costse, which sometimes are confluent. 

 Calicos large and very slightly projecting, shallow, with margins 

 rounded off, resembling circular bourrelets. "Walls of calicos 

 rudimentary. Polygonal grooves between the calicos indicating 

 the junction of corallites. Septa well developed and uniting by 

 their inner edges without the intervention of a columella. 



Distribution. — Fossil. Trias: Europe. Oolite: Europe, Eng- 

 land ? Cretaceous : Europe. 



The unclassical word Confusastrcea was abolished by Eeuss. 



V. AUiance CYATHOPHOROIDA. 

 Massive Astraeidse, increasing by gemmation. Corallites separated by 

 coenenchyma or exotheca. Columella absent or present. Dissepiments 

 or transverse tabulae. 



Genus Cyathophora, Mich. 



Genus Areacis, Ed. & H. 



Genus Psammophora, E. de From. 



Genus Ctathophoea, Michelin, Icon. ZoopTi. p. 104 (1843), 

 amended. 



Colony massive, convex. Corallites united by their costse and 



