104 



COELENTEEATA— ANTHOZOA 



PHYLUM II 



side of corallum ; individual corallites without proper walls, but united by- 

 costal septa. Columella styliform or rudimentary. Septa well developed, 

 composed of fan-shaped rows of cylindrical trabeculae, and united by synapti- 

 culae and dissepiments. Very abundant from Trias to Oligocene. 



Cyclolites undidata Lam. 



Fk;. ir.i. 



Upper Cretaceous ; Gosan Valley, Salzkammergnt. n, Side view ; h, Lower 

 surface ; r, Lateral aspect of septum, natural size. 



Dimorphastrea d'Orb. Like the preceding, but with calices concentrically 

 arranged about a central individual. Trias to Tertiary. 



Comoseris d'Orb. (Fig. 163). Like Dimorpharaeo, but with calices separated 

 into groups by ascending flexuous ridges. Jurassic and Tertiary. 



Astraeomorpha Reuss. Coralla composite, tuberous, basally expanded, or 

 branching, and covered with corrugated epitheca. Corallites small, united by 

 short and stout costal septa ; columella styliform. Trias to Oligocene. 



Fi(i. 102. 



A, Dimorjiharam, Lateral surface of costal septum, enlarged 

 (8/1), showing trabecular constitution ; in., Line of junction of 

 two septa belonging to diHercnt corallites ; t, Trabeculae ; 

 ]i, Trabecular lacunae (after Pratz). />', I)imurjili<iraca ai/ari- 

 cites (Goldluss). Upper Cretaceous ; Gosau, Salzkanimergut. 

 Portion of upper surface of corallum, natural size. 



Fk;. 163. 



Comoseris conferia Reuss. Oligocene ; Monte 

 Carlotta, near Vicenza. Twice enlarged. 



Microsolena Lamx. Colony massive, polymorphous, mammiliform, conical, 

 with a broad base, nearly spherical, turbinate and pedunculate. Trias and 

 J urassic. 



Suborder 3. PERFOEATA Milne Edwards and Haime. 



Skeleton built up of small calcareous bodies (sclerites), between which are empty 

 Interstices of greater or lesser size. Theca formed by fusion of outer septal edges or 

 absent. Interseptal Icculi empty throughout or traversed by synaptiada or 

 dissepiments. 



