INTRODUCTION. lxxiii 



The general form of the corallum is similar to that of the Isis, Gorgonia, &c, in the 

 order of Alcyonaria ; but may be distinguished from these by its surface being spinulous 

 or smooth, whereas it is always sulcated in Alcyonaria. 



Family ANTIPATHIDtE. 



Gray, Synop. of the Brit. Mus., p. 135, 1842; Dana, Zooph., p. 5/4, 1846. 



1. Genus Antipathes. 

 (In parte) Pallas, Elench. Zooph., p. 209, 1766. 

 Corallum arborescent ; its surface spinulous. 

 Typ. sp., Antipathes myriophylla, Ellis and Solander, Zooph., tab. xix, figs. II, 12. 



2. Genus CiiiitHiPATnES. 



De Blainville, in Diet, des Sc. Nat., vol. lx, p. 4/5, 1830. 



Corallum not arborescent, and having the form of a simple cylindrical stem ; its surface 

 spinulous. 



Typ. sp., Cirrhipath.es spiralis, Blainv., loc. cit. ; Antipathes spiralis, Ellis and Soland., Zooph., tab. xix, 

 fig. 1. 



3. Genus Leiopathes. 

 Gray, Synops. of the Brit. Mus., p. 135, 1842. 

 Corallum arborescent ; its surface smooth. 



Typ. sp. Leiopathes glaberrima ; Antipathes glaberrima, Esper, Pflanz., Antipathes, tab. ix. 



ZOANTHARIA INCERTtE SEDIS. 



1. Genus Heterophyllia. 



M'Coy, Palaeozoic Corals, in Ann. and Mag. of Nat. Hist., 2d series, vol. hi, p. 126, 1849. 



Corallum composed of a tall, subcylindrical, irregularly fluted, stem (or tube), containing 

 a few laminae, irregularly branching and coalescing, but not presenting a radiate appearance. 



Typ. sp., Heterophyllia grandis, M'Coy, loc. cit., figs, a, b. 



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