90 COELENTERATA—ANTHOZOA SUB-BRANCH II 
Astrocoenia, E. and H. (Fig. 157). Massive colonies. Corallites polygonal, 
united by their walls; septa numerous, long. Columella styliform; only 
dissepiments present in visceral 
chamber. ‘Trias to Tertiary. 
Stephanocoenia, FE. and H. 
Like the preceding, but with 
columella surrounded by cycle of 
pali. Trias to Recent. 
Phyllocoenia, E. and H. (Con- 
: fusastraea, WOrb.; Adelastraea, 
Fic. 157. 3 Reuss). Massive colonies. Coral- 
_ Astrocoenia decaphylla, E. and H. Upper Cretaceous ; Gosau lites round or oval, impertectly 
Valley, Austria. «@, Corallum, natural size ; b, Calices enlarged. : 1 
nd ; united by costae. Septa strongly 
developed, thickened in the middle between theca and the centre. Columella 
rudimentary. Trias to Tertiary. 
Converastraea, VOrb.; Trias to Cretaceous. Colummnastraea, Stylocoenia, FE. 
and H., ete. ; Cretaceous and Tertiary. 

y. Coralla multiplying by fission. 
Y prying vi 
Haplosmilia, VOrb. Bushy colonies. Corallites usually with dichotomously 
dividing crests. Calices circular or elongated ; columella styliform ; theca with 
ridge-like costae. Jurassic. 
Plocophyllia, Reuss (Fig. 158). Branching, foliaceous, or massive colonies. 

Fic, 158. Fic. 159. 
Plocophyllia calyculata, Reuss. Oligocene ; Monte Rhipidogyra crassa, From, Coral- Rag; Gray, 
Carlotta, near Vicenza. Natural size. Haute-Sadne. 1/5 natural size. 
Corallites either becoming free or grouped into detached rows. Columella 
absent. ‘Tertiary. 
Barysmilia, F. and H. Corallum massive, forming a thick stem, the apex 
of which is covered with short buds. Calices oval, sometimes disposed in 
series ; columella rudimentary. Cretaceous. 
Stenosmilia, From. Like the preceding, but with lamellar columella. 
Cretaceous. 
Pachygyra, FE. and H.  Corallites arranged in winding rows, and united by 
