72 



PEOF. P. MAETIN DTJNCAN's REYISIOIS' OF THE 



III. Alliance DENDROSMILIOIDA. 

 Astrseidse gemmantes with small subdiendroid forms. The corallites 

 short. Columella spongy or parietal. Septa entire. Endotheca present. 

 Genus PouRTALosMiLiA, Duncau. 

 Genus Dendrosmilia, Ed. & H. 



Grenus Potjrtalosmilia, Duncan. 



Sjn. JBlastosmiUa, Duncan (a name preoccupied), Madrepo- 

 raria of the Deep Sea, Trans. Zool. Soc. vol. x. pt. 5, 1878, p. 244. 



Colony formed hj repeated gemmations from the wall of the 

 parent corallite, and occasionally" from the walls of buds. Coral- 

 lites conico -cylindrical, long, bent, except the straight parent, 

 and parallel with this last. Calices circular, deep. Columella 

 rudimentary, or as trabeculse from the septal ends. Septa 

 entire, thin, slightly exsert ; they project but slightly into the 

 calice, except the primaries and secondaries. Costae rudimentary 

 and only exist near the calices, "Wall thin, with a granular 

 epitheca closely attached. Dissepiments wide apart. 



Distrilution. — Becen t. Medi terran ean. 



It must be noticed that the parent corallite survives with 

 the buds and does not die, as in Anomocora and Coenosmilia. 



G-enus Dendrosmilia, Milne-Edwards ^ Jules Haime, Compt. 

 Hend. de VAcad. des Sci. t. xxvii. p. 468 (1848). 

 Colony small, subdendroid, increasing by lateral and alternate 

 gemmation. Corallites subturbinate, short, free by their sides. 

 Calices suboval. Columella spongy, well developed. Septa entire, 

 thin, close, very unequal and granulated on their sides. CostaB 

 broad, simple, and granular. Endotheca present. No epitheca. 

 Distribution. — Fossil. Cretaceous and Eocene : Europe. 



IV. AlHance STYLOSMILIOIDA. 



Astrseidse gemmantes with fasciculate, tufted, dendroid forms. The septa 

 entire or dentated. The columella stout, styliform, or papillary. 

 Genus Stylosmilia, Ed. & H. 

 Genus Stylocora, Reuss. 

 Genus Stylocora, E. de From.^ 1872. 

 Genus Placophyllia, d'Orb. 

 Genus Donacosmilia, E. de From. 



Genus Stylosmilia, Milne-Edwards Sf Jules Uaime^ Hist. 



Nat. des Corall. vol. ii. p. 220 (1857). 

 Colony in tufts which are fasciculate. Gremmation lateral. 



