lxxxii BRITISH FOSSIL CORALS. 



12. Genus Melit^ea. 



Lamouroux, Polyp. Flex., p. 461, 1816. 

 Axis composed of joints, which are alternately calcareous and suberous. 

 Typ. sp., Melitcea ochracea, Lamouroux, loc. cit., p. 462. 



Third Tribe- CORALLINE. 



Dana, loc. cit., p. 639, 1846. 

 Common axis inarticulate, solid and calcareous. 



13. Genus Corallium. 

 Lamarck, Hist, cles Anim. sans Vert., t. ii, p. 295, 1816. 

 Typ. sp., Corallium rubrum, Cavolini, Mem. per Servire all. Hist, des Polypi Marini, tab. ii. 



Family III. 

 PENNATULIDiE. 



Pennatula, Linnaeus, Syst. Nat., 10th ed., p. 818 ; Pallas, Elen. Zooph., p. 362, 1/66 ; Polypi natantes, 

 Lamarck, op. cit., p. 415; Pennatulidce, Fleming, Brit. Animals, p. 507, 1828; Pennahdaria, Blainville, 

 Manuel, p. 512, 1830; Calomides, Latreille, Fam. du Reg. Anim. p. 543; Pennatulina, Ehrenberg, loc. 

 cit., p. 63, 1834 ; Pennatididce, Johnston, Brit. Zooph., p. 175 ; Dana, Explor. Exped. p. 567, 1846. 



Polypi aggregate, and having a common peduncle, the centre of which is occupied 

 by a peculiar cavity, and usually contains a solid axis; this sclerobasis styliform, and never 

 expanding at its under extremity, so as to adhere to extraneous bodies. The polypi mass 

 is consequently free. 



1. Genus Pennatula. 



(In parte.) Linnaeus, Syst. Nat., 10th ed., p. 818, 1760; Lamarck, Syst. des An. sans Vert., p. 380, 1801. 



Polype mass plume-shaped, with the shaft composed of contractile common tissue, con- 

 taining a short subosseous axis, and bearing on each side of its upper part a series of 

 large spreading pinnules, on the upper edge of which, the retractile exhalic portion of the 

 polypi protucles. The axis is cylindrical at its upper part, and more or less quadrangular 

 towards its lower end ; its structure is somewhat fibrous, and its tissue is not very brittle. 



Typ. sp., Pennatida setacea, Esper, Pflanz., Pennat. tab. vii. 



