86 



COELENTERATA ANTHOZOA 



SUB-BRANCH II 



LitJwphyllia, E. and H. 

 Miocene and Recent. 



Like the preceding, but with vesicular columella. 



ft. Simple corolla or composite colonies multiplying l>y calicinal or marginal 



gemmation. 



Stylophyllum, Reuss. Corallum simple, either with or without calicinal or 



marginal gemmation, 



FIG. 141. 



Stylocora exilis, Reuss 

 cene ; Niederieis 



Mio- 



or forming massive colonies. Septa stout, but only 

 inferiorly complete, terminating above in strong vertical 

 spines. Dissepiments vesicular ; wall covered with 

 epitheca. Alpine Trias. 



Stylopliyllopsis, Freeh. Simple or imperfectly branch- 

 ing. Septa terminating near the centre in detached 

 vertical spines. Alpine Trias. 



y. Busliy colonies multiplying by lateral gemmation. 



Cladocora, Ehrbg. Corallum composed of long 

 Austria, cylindrical branches, free on all sides. Calice circular ; 

 septa well developed ; columella papillous ; cycle of pali 

 present. Jurassic to Recent. 



Stylocora, Reuss (Fig. 141). Branches cylindrical; septa stout, those of the 

 first cycle with columnar thickenings on inner edges ; columella styliform. 

 Cretaceous and Miocene. 



Pleurocora, E. and H. Cretaceous. Goniocora, E. and H. Triassic and 

 Jurassic. 



8. Composite corallites multiplying by basal gemmation ; buds arising from stolons 



or basal expansions. 



Pihizangia, E. and H. (Fig. 142). Corallites united by short, sub-cylindrical 



stolons. X^alices shallow, circular; columella papillous. Cretaceous and Tertiary. 



Latusastraea, d'Orb. Corallites arising from common basal expansion, short 



FIG. 142. 



Rhizangia Michelini, Reuss. 

 Middle Cretaceous ; Gosau Valley, 

 Austria. Natural size (after Reuss). 



FIG. 143. 



Cladangla conferta, Reuss. Miocene ; Bischof- 

 swart, Moravia. a, Corallum, natural size ; 

 1), Calice enlarged (after Reuss). 



and strongly inclined to one side, so that the calices acquire a semicircular 

 contour and assume the form of protruded lips. Jurassic and Cretaceous. 



Astrangia, Cryptangia, Phyllangia, dadangia, Ulangia, E. and H, etc. 

 Tertiary and Recent. 



. Massive coralla multiplying by lateral gemmation. 



Heliastraea, E. and H. (Fig. 144). Cylindrical corallites united by exothecally 

 produced, confluent, costal septa. Columella spongy ; dissepiments numerous 

 between the septa both within and exterior to the theca. Jurassic to Recent. 



