INTRODUCTION. .- Ixxili 
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 spimulous 
or smooth, whereas it is always sulcated in Alcyonaria. 
Family ANTIPATHID A. 
Gray, Synop. of the Brit. Mus., p. 135, 1842; Dana, Zooph., p. 574, 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. 11, 12. 
2. Genus CIRRHIPATHES. 
De Blainville, in Dict. des Sc. Nat., vol. lx, p. 475, 1830. 
Corallum not arborescent, and having the form of a simple cylindrical stem ; its surface 
spinulous. 
Typ. sp., Cirrhipathes spiralis, Blainy., 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 INCERTAi SEDIS. 
1. Genus HetrRoPpHYLiia. 
M ‘Coy, Paleozoic Corals, in Ann. and Mag. of Nat. Hist., 2d series, vol. ii, p. 126, 1849. 
Corallum composed of a tall, subcylindrical, irregularly fluted, stem (or tube), containing 
a few lamine, regularly branching and coalescing, but not presenting a radiate appearance. 
Typ. sp., Heterophyllia grandis, M‘Coy, loc. cit., figs. a, B. 
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