NO. 1193. SOME NEOCENE CORALS— GANE. 189 



Oolouy encrusting, of closely united corallites often free at tlieir 

 summit. Walls minutely granulated on the exterior surface. Costte 

 present, most distinct near the calicular edge. Caiices open, deej) and 

 circular except when crowded. Septa very slightly exsert, narrowed 

 at top, in six systems of three complete cycles with part of a fourth; 

 those of the third cycle a little narrower than the preceding, uniting 

 with them inferiorly and near the columella; edges sharply and some- 

 what coarsely dentate; sides granulated. Columella well developed, 

 papillary, the outer part resembling the inner teeth of the septa. 

 Gemmation both from marginal buds on the basal expansion and from 

 the sides of the coral between the parent corallites. 



This species is found recent on the shores of the Atlantic from 

 North Carolina to Florida. It is very nearly related to Astrangia dance 

 Agassiz, occurring on the coast of this country from New Jersey to 

 Massachusetts. It also in many respects resembles the fossil Astrangia 

 lineata from the Virginia Miocene. 



Dimensions. — Breadth of calice, from 2 to 4 mm. 



Geological Jiorizon. — Miocene. 



Locality. — Cain Hoy, South Carolina. 



Collections. — U. S. National Museum. 



Genus ASTRANGIA Kdwards and Haime. 



Subgenus COENANGIA Verrill. 



CCENANGIA BELLA (Conrad). 



1841. Astrce iella Conrad, Proc. Ac. Nat. Sci. Phila., I, p. 33. 



1842. Astrw bella Conrad, Jour. Ac. Nat. Sci. Phila., VIII, Pt. 2, p. 189. 

 1857. Astrmu/ia? bella Edwards and Haime, Hist. Nat. dea Corall., II, p. 615. 

 1857. Astrcea bella Tuomey and Holmes, Pleiocene Foss. South Carolina, p. 1, pi. 



I, figs. 1, la. 



1860. Astrcea bella Holmes, Pleiocene Foss. South. Carolina, p. 1, pi. i, fig. 2. 



1861. Asirangiaf bella de Fromentel, Introduct. Polyp. Foss., p. 237. 

 1864. Astra-a bella Meek, Check-list Invert. Foss. N. Am. Miocene, p. 1. 



1868. Astrangia (Cwnangia) bella Verrill, Trans. Conn. Ac. Art. Sci., I, Pt. 2, p. 530. 

 1895. Coenangia bella Gane, Johns Hopkins Univ. Circ, XV, No. 121, p. 9. 



Colony incrusting, rising at times into lobate extensions. Corallites 

 thin walled, closely united. Caiices irregularly prismatic, quite deep, 

 with their fossae narrow at the bottom. Septa in three complete cycles, 

 the third less stout and usually curved toward and united, near the 

 columella, to those of the preceding cycle; occasionally part of a 

 fourth cycle is developed. Septa thin, with free edges sharply and 

 roughly denticulated throughout; sides somewhat coarsely granulated, 

 frequently the granules being also present on the inside wall of the 

 calice. Columella moderately developed, spongy, composed of con- 

 torted processes originating from the inner margins of the septa. 

 Gemmation takes i)lace in the interspaces' between the corallites. 



This species is closely related to the living Ccenangia conferta of 

 the Pacific, and Astrangia danw Agassiz and Astrarigia astrwiformis 

 of the Atlantic. 



