IXxXxi BRITISH FOSSIL CORALS. 
12. Genus MEnitza. 
Lamouroux, Polyp. Flex., p. 461, 1816. 
Axis composed of joints, which are alternately calcareous and suberous. 
Typ. sp., Melitea ochracea, Lamouroux, loc. cit., p- 462. 
Third Tribe— CORALLIN &. 
Dana, loc. cit., p. 639, 1846. 
Common axis inarticulate, solid and calcareous. 
13. Genus CoRALLIUM. 
Lamarck, Hist. des 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. 
PENNATULIDA. 
Pennatula, Linnzeus, Syst. Nat., 10th ed., p. 818; Pallas, Elen. Zooph., p. 362, 1766; Polypi natantes, 
Lamarck, op. cit., p. 415; Pennatulide, Fleming, Brit. Animals, p. 507, 1828; Pennatularia, Bainville, 
Manuel, p. 512, 1830; Calomides, Latreille, Fam. du Reg. Anim. p. 543; Pennatulina, Ehrenberg, loc. 
cit., p. 63, 1834; Pennatulide, Johnston, Brit. Zooph., p. 175; Dana, Explor. Exped. p. 587, 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.) Linnzeus, 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 protudes. 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., Pennatula setacea, Esper, Pflanz., Pennat. tab. vii. 
