104 



COELENTERATA— 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 undulata Lam. 



Fig. IGl. 



Upper Cretaceous ; Gosau Valley, Salzkainmergut. 

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



(I, Side view ; h, Lower 



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

 arranged about a central individual. Trias to Tertiary. 



Co7noseris d'Orb. (Fig. 163). Like Dimorpharaea, but with calices separated 

 into groups by ascending flexuous ridges. Jurassic and Tertiary. 



Astraeomorpha Eeuss. 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. 





FKi. 162. 



A, Dimorplmraea, Lateral surface of costal septum, enlarged 

 (8/1), showing ftabecular Constitution ; m, Line of junction of 

 two septa belonging to difterent corallites ; t, Trabeculae ; 

 p, Trabecular lacunae (after Pratz). B, Dimorpharaea agari- 

 cites (Goldfuss). Upper Cretaceous ; Gosau, Salzkainmergut. 

 Portion of upper surface of corallum, natural size. 



Fi(i. 163. 



Comoseris conferta 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 

 Jurassic. 



Suborder 3. PERFORATA Milne Edwards and Halme. 



Skeleton huilt up of small calcareous hodies (sclerites), between which are empty 

 interstices of greater or lesser size. Theca formed hj fusion of outer septal edges or 

 absent. Interseptal loculi empty throughout or traversed by synapticida or 

 dissepiments. 



