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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INTRODUCTION.<br />
Ixxv<br />
Family I.<br />
ALCYONID^E.<br />
Polypi adherent and not provi<strong>de</strong>d with an epi<strong>de</strong>rmic sclerenchyma.<br />
Ifi this family, <strong>the</strong> <strong>de</strong>rmic tissue is usually consolidated by a great number <strong>of</strong> sclerenchymous<br />
spicula imbed<strong>de</strong>d in its substance, and constitutes sometimes a tubular corallum,<br />
but <strong>the</strong>re is never any trace <strong>of</strong> a central stem or axis, like that which is constituted by <strong>the</strong><br />
sclerobasis in Goi'gonidae and in most <strong>of</strong> <strong>the</strong> Pennatuli<strong>de</strong>e.<br />
First<br />
Tribe—COUNULARINiE.<br />
Polypi simple or segregate, and produced by gemmation on creeping stolons, or basal<br />
membranaceous expansions, and having no lateral buds or connecting appendices.<br />
1. Genus Cornulauia.<br />
Lamarck, Hist, <strong>de</strong>s An. sans Vert., vol. ii, p. Ill, 1816.<br />
Polypi rising by gemmation from creeping filiform stolons, and provi<strong>de</strong>d with a tough<br />
or subcorneous tubiform polypidom, <strong>the</strong> surface <strong>of</strong> which is not costulated.<br />
Typ. sp., Cornidaria corimcopice, Cuvier; Tuhvlaria cornucopicB, Cavolini, Mem. per Servire alia Storia<br />
<strong>de</strong> Polipi Marini, tab. ix, figs. 11, 12 ; Cornidaria ruffosa, Lamarck, loc. cit.<br />
2. Gemis Clavularia.<br />
Quoy and Gaimard, ap. Blainville, Diet, <strong>de</strong>s Sc. Nat., vol. Ix, p. 499, 1830 ;<br />
Actinantha, Lesson, Zool.<br />
<strong>de</strong> la CoquiUe, Zooph., p. 89, 1831.<br />
Polypi resembling Cornularia, but having <strong>the</strong>n- tubular polypidoms costulated and<br />
incrustated with long spicula.<br />
Typ. sp., Clamdaria viridis, Quoy and Gaim., Voyage <strong>de</strong> I'Astrolabe, Zooph., tab. xxi, fig. 10.<br />
3. Genus Rhizoxenia.<br />
Ehrenberg, Corall. Roth. Meer., p. 55, 1834.<br />
Polypi resembling those <strong>of</strong><br />
<strong>the</strong> preceding genus, but not retractile.<br />
Typ. sp., Rhizoxenia tludassanthu, Eliv. ;<br />
Zoantha thalassantha, Lesson, Voyage <strong>de</strong> la CoquiUe, Zooph.,<br />
tab. i, fig. 2.