64 



PROF. P. MAETIN DUNCAN'S REVISIOI^ OE THE 



of growth. Eigbt genera were included in the subfamily by Milne- 

 Edwards & Jules Haime ; Grosse, de Eromentel, d'Orbigny, Yerrill, 

 Eeuss, Keferstein, T. Woods, and de Pourtales added others to 

 the group. Some of the genera were established on morphological 

 data which were not of more than specific classificatory value ; 

 and they have been absorbed. 



The AstrceidcB reptantes correspond to the Turhinolidce reptantes 

 of the family Turbinolidse ; and they have great affinities with 

 the Oculinidse. No division can be made between the "Alliances " 

 of the subfamily from the morphology of the septal edges ; for 

 some septa may be smooth and others denticulate in the same 

 calice in many genera. It is an important consideration, for it 

 lays the foundation of a doubt regarding the value of the Eusmi- 

 line and Astrseid groups of Milne-Edwards and J. Haime. 



The subfamily AstrceidcB reptantes (Astrangiacese, Ed. & H.) 

 contained nineteen genera. But after revision eleven genera 

 and two subgenera remain, which arrange themselves under two 

 Alliances. Eour genera are removed to other groups. 



Alliances. 



I. Rhizangioida. 



II. ASTRANGIOIDA. 



I. Alliance RHIZANGIOIDA. 



Astraeidae reptantes with a complete epitheca, with or without pali. Septa 

 denticulate on the free edge, the primaries sometimes with a subentire 

 edge. 



Genus Cylicia, Ed. & H. 

 Genus Scolangia, T. Woods. 

 Genus Cryptangia, Ed. & H. 

 Genus Rhizangia, Ed. & H. 

 Genus Bathangia, Keferst. 



Grenus Cylicia, Ililne-Edwards Sf Jules Haime, Polyp, foss. des 

 terr. paleoz. p. 116 (1851) ; Hist. Nat. des Corall. vol. ii. p. 606, 

 1857-60 (Culicia, Dana, 1846). 



Colony spread over surfaces, and composed of close or rather 

 distant but independent corallites. These are short, sub cylindrical, 

 often oblique, with a large base. Calicos subcircular and rather 

 deep. Columella papillary and well developed. Septa thin, close, 

 not exsert, the principal with a subentire margin, the others very 



