88 



COELENTERATA ANTHOZOA 



SUB-BRANCH II 



Wall costate, without epitheca ; columella absent. Trias, Jurassic, and Ter- 

 tiury. Especially common in Alpine Trias. C. clathrata, Emmrich sp. 



Thecosmtiia, E. and H. (Fig. 149). Colony bushy, calices dividing by fission, 

 and more or less free. Epitheca corrugated, readily wearing away ; columella 

 absent or rudimentary. Trias to Tertiary. According to Freeh identical with 

 Calamophyllia. Very common in Triassic and Jurassic. 



Barypliyllia, From. Hymenophyllia, E. and H., etc. Cretaceous. 



6. Corolla, with confluent calices increasing ly fission. 



Leptoria, E. and H. (Fig. 150). Corallum massive, composed of labyrinthic 

 rows of confluent corallites with fused walls. Septa closely crowded, approach- 

 ing parallelism ; columella f oliaceous. 

 Jurassic to Tertiary. 



Diploria, E. and H. Like the 

 preceding, but with corallites united 

 i iiili JE^1 by produced costal septa instead of 

 directly by their walls. Cretaceous 

 to Recent. 



Aspidiscus, Konig. (Fig. 151). 

 Corallum discoidal, circular, or 

 FIG. 150. elliptical, covered on lower side 



Aspidiscus cnstutits, . f . , , , . , ~ ,. . . 



Leptoria Konincki, Renss. Konig. Middle Greta- With Wrinkled epitheca. CallCinal 



NKi C s r ffe ace Us;G( luValley ' NZ S rai B s a ize a ' AIgeria ' furrows radiating from the centre 



outwards, and separated from one 



another by sharply crested ridges. In the centrifugally disposed corallites the 

 outermost septa are thickened, and form by their union a banded margin. 

 Cretaceous. 



Stiboria, Etall. Jurassic. Stelloi-ia, d'Orb. Cretaceous. Maeandrina, Lam. 

 Cretaceous to Recent. SymphylUa, E. and H. Tertiary and Recent. 





Sub-Family B. EUSMILIINAE. Milne-Edwards and Haime. 

 Upper septal edges entire, not serrated. 



a. Simple coralla. 

 Trochosmilia, E. and H. (Fig. 152). Turbinate, base acutely pointed or 



FIG. 152. 



Trochosmilia granifera, Raiine. Tnronian ; Bains-de- 

 Rennes, France, a, Profile ; b, Calice slightly enlarged 

 (after Fromentel). 



loan. 



E. and H. White 

 Chalk ; Luneburg, 

 llanovcr. Natural 

 size. 



FIG. 154. 



PlacosmUia cuneiform b, K. 

 and H. Upper Cretaceous ; 

 St. Gilgen on Wolfgangsee, 

 Austria. Natural size. 



encrusting. Septa numerous, extending to the centre. AVall without epitheca, 



