A monograph of the British fossil corals - kreidefossilien.de
A monograph of the British fossil corals - kreidefossilien.de
A monograph of the British fossil corals - kreidefossilien.de
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Ixxviii<br />
BRITISH FOSSIL CORALS.<br />
12. Genus Xenia.<br />
Savigny, Egypte, Atlas and op., Lamarck, op. cit., vol. ii, p. 629, 1816.<br />
Polypi forming subramified masses, as in Alcyonium, but not retractile, and not having<br />
a thick coating <strong>of</strong> spiciilcE at <strong>the</strong> basis <strong>of</strong> <strong>the</strong> tentacula.<br />
Typ. sp. Xenia umbellata, Savigny, Egypte, Polyp., tab. i, fig. 3.<br />
13. Genus Nephthya.<br />
Savigny, Atlas <strong>de</strong> I'Egypte; Blainville, Manuel d'Actinol, p. 523; Spoggo<strong>de</strong>s, Lesson, lUustr. <strong>de</strong><br />
Zoologie, 1831.<br />
Polypi forming arborescent masses, incompletely retractile, and having <strong>the</strong> bor<strong>de</strong>rs <strong>of</strong><br />
<strong>the</strong> calice thick and incrustated with large navicular spiculse.<br />
Typ. sp„ Nephthya Chalroli, Audouin, ap. Savigny, Egypte, Pol. tab. ii. fig. 5.<br />
14. Genus Paralctonium.<br />
Alcyonidia, Milne Edwards, Ann. <strong>de</strong>s Sc. Nat. 2d series, vol. iv, p. 323.<br />
Polypi resembling Nephthya, but being completely retractile, and having <strong>the</strong> lower<br />
part <strong>of</strong> <strong>the</strong> common mass incrustated with a thick coating <strong>of</strong> long navicular spicula>, but<br />
<strong>the</strong> upper part membranaceous and retractile,<br />
Typ. sp., Paraleyonium elegans ; Alcyonidia elegans, Milne Edwards, loc. cit., tab. xii and xiii.<br />
15. Genus Sarcophyton.<br />
Lesson, Zoologie du Voyage <strong>de</strong> la Coquille, Zooph., p. 92, 1831.<br />
Differs from <strong>the</strong> genus Alcyonium by <strong>the</strong> great abundance and <strong>the</strong> peculiar structure<br />
<strong>of</strong> <strong>the</strong> common tissue, <strong>the</strong> cells <strong>of</strong> which are tubular, and arranged with great regularity<br />
in fasciculi, perpendicularly to <strong>the</strong> upper surface <strong>of</strong> <strong>the</strong> mass.<br />
Typ. sp., Sarcophyton plicatum, Valenciennes MSS. ; Sarcophyton lobulatum. Lesson, loc. cit. ; Alcyonium<br />
plicaium, Lamarck, Hist, <strong>de</strong>s An. sans Verteb., vol. ii, p. 395.<br />
16. Genus Cespitularia.<br />
Valenciennes MSS.<br />
Polypi non-retractile, arranged in fascicidi, and united in <strong>the</strong> greatest part <strong>of</strong> <strong>the</strong>ir<br />
length by a <strong>de</strong>nse, tough, common tissue, as in Alcyonium.<br />
Typ. sp., Cespitularia tmdtipinnata, Valen. ; Cornularia multipinnata, Quoy and Gaimard, Voyage <strong>de</strong><br />
I'Astrolabe, Zooph., tab. .x.xii, figs. 1-4.