FAMILIES AND GENERA OE THE MADEEPOEARIA. 



83 



numerous, exsert, are spined or strongly toothed, especially near 

 the calicular margin, and the systems are irregularly developed. 

 Costae spined. Walls striated, and either naked or presenting 

 a rudimentary epitlieca. Endotheca well developed. 



Distribution. — Mecent. West Indies, East Indies, Red Sea, 

 Pacific, Chioa. 



The young indiyiduals cannot be distinguished from simple 

 Astrseidse of the Antillia type. It is a large genus, and may be 

 divided iuto those with the corallifces free and with calicos circum- 

 scribed — MusscB cymosce ; and those in which serial growth pre- 

 ponderates — MusscB gyroscB. 



The principal distinction of Mussa from the genus Sympliyllia 

 consists in the perfect union of the walls in this last-named genus. 



5. Subfamily Astrceidce confluentes. 



Astraeidse with entire or dentate, ragged, and spined septa, 

 increasing by fissiparity and having excess of serial growth. 

 Gremmation may occur. Corallites united by their walls, costae, 

 or by intermediate tissue, or free. 



Alliances. 



I. EUPHYLLIOIDA. 

 II. EUGYROIDA. 



III. Symphyllioida. 



lY. MONTICULOIUA. 



Eorty genera have been recorded, and revision leaves thirty- 

 three. One old genus becomes a subgenus, and six lapse. 



I. Alliance EUPHYLLIOIDA. 



Colony csespitose, foliaceous, or flabeUiform. Septa dentate or entire. 

 Calices in long series, sinuous or not ; not united by their walls or costae, 

 but free. 



Genus Euphyllia, Ed. & H. 

 Genus Glyphophyllia, E. de From. 

 Genus Rhipidogyra, Ed. & H. 

 Genus Teleiophyllia, Duncan. 

 Genus Desmocladia, Reuss. 



Genera absorbed :— 



Plocophyllia, Reuss; Stenogyba, E. de From.; 

 Fro ME NT ELI A, Ferry. 



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