A monograph of the British fossil corals - kreidefossilien.de

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Ixxxiv BRITISH FOSSIL CORALS. 7. Ge7lttS LiTUARIA. Valenciennes MSS., Cat. of the Zoophytes in the Museum of Paris. Resembling Veretillum, but having a long well-developed axis, quadrangular and tapering towards its lower part, inflated, claviform, pitted and echinulate at its upper end. Typ. sp., Lituaria phalloides, Valenciennes, loc. cit. ; Pennatula phalloides, Pallas, Misccl. ZooL, tab. xiii. 8. Genus Cavernularia. Valeuciemies, loc. cit., MSS. Resembling Veretillum, but having in its centre a large fibrous tube divided longitudinally into four cavities, and not containing any calcareous or horny axis. Typ. sp., Cavernularia obesa, Valenciennes MSS. 9. Genus Renilla. Lamarck, Hist, des Anini. sans. Verteb., vol. ii, p. 428, 1S16. Polyp-mass explanate, unifacial, reniform, with a short, slender peduncle, containing a central cavity as in Pennatula, but not having any solid axis. Typ. sp., Renilla Americana, Lamarck; Pennatula reniformis, Ellis and Solander, p. 67; Shaw, Miscel. iv, tab. cxxxi.\. The genus Graptolithus (Linnaeus, Ifer Scan. 1751,) appears to have more affinity with Virgidaria than witli any other recent zoophyte. The polype mass is slender, virgate, and often becomes bifurcate by the progress of growth. The axis projects at the inferior extremity of the stem, and is often bifurcate. Example, Graptolithus ramosus. Hall, Palseoat. of New York, tab. Ixxiii, fig. 3. The genus Websteria, nob. appears to be very similar to Graptolithus by its general structure, but offers also a certain resemblance to some Sertularidse and to certain Bryozoa. In the present state of our knowledge, the natural affinities of these fossil zoophytes are indeed so obscure, that we hesitate to place them in any of the preceding zoological divisions, and prefer leaving them in the incertce secUs. Typ. sp., Websteria Crisio'ides, nob., tab. vii, fig. .5.
INTRODUCTION. Ixxxv Order 3. PODACTINARIA. Polypi luiviiig the gastric cavity surrounded by four vertical membrauaceous septa, at the upper end of which are placed four pairs of intestiniform reproductive organs. The tentacula discoidal, pedunculated, not tubular as in Zoantharia and Alcyonaria, but organized much in the same way as in Echinoderma. The mouth proboscidiform, and the fauces surrounded by numerous internal, filiform, contractile appendices. The genus Lucernaria is the only known representative of this zoological type, and comprises no coralligenous polypi. Sub-class 2. HIDRARIA. Polypes sertulariens, Audouiu and Milne Edwards, Recherches sur les Anira. sans Verteb., faites aux iles Chausay, in Ann. des Sc. Nat., 1st series, vol. xv, p. 18, 1828, ap. Lamarck, Hist, des An. sans Verteb. 2d ed., vol. ii., p. 105; Sertulariacaa {in parte), Blainville, Manuel d'Actinologie, p. 465, 1834; ZoocoraUia oligactinia, Ehrenberg, Coral. Roth. Meeres, p. 67, 1834; Zoophyta Hydroida, Johnston, in Mag. of Zool. and Bot., vol. i, p. 447, 1837; Polyparia, Gray, Synop. Brit. Mas. ; Nudibranchiata, Farre, on the Structure of Polypi, Phil. Trans. 1837 ; Hydrozoa, R. Owen, Lectures on the Comp. Anat. of the Inverteb. Animals, p. 82, 1843; Ilydroidea, Dana, Exploring Expedition, Zooph. p. 685, 1846; Anthozoa Hydroidea, Johnston, British Zooph, 2d ed. p. 5, 1847. Polypi mth a simple, non-lamelliferous, digestive cavity. No internal generative organs. Tentacula filiform and subverrucose. The naked, fresh-water zoophytes of the genus Htdra constitute the type of this group, and till very lately were considered as being closely allied to Sertularia, Campanularia, &c. ; but the recent observations of divers zoologists tend to estabhsh that all the coralhgenous animals of this form belong to the class of Medusa. Till this question is decided, it would therefore be idle to make any modifications in the systematic arrangement of these problematic polypi, and it will suffice for us to refer the reader to Dr. Johnston's valuable work on 'British Zoophytes,' for the characters of the generic divisions generally adopted.
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THE PALiEONTOGRAPHICAL SOCIETY. INS
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i. E. ADLJIED, PBINTr.B, BARTHOLOME
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e 7b-^,pi'? PRINTED BY C. AND .1. A
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INTRODUCTION. iii centre of the ram
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INTRODUCTION. v certain parts of th
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INTRODUCTION. vii in which the mult
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INTRODUCTION. ix Sub-class 1. CORAL
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; INTRODUCTION. xi Sub-order 1. ZOA
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INTRODUCTION. xiii 3. Genus Acantho
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; INTRODUCTION. xv formed by proces
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; INTRODUCTION. xvii IS. Genus Plat
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INTRODUCTION. xix Aberrant Group. P
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INTRODUCTION. xxi 8. Genus Amphelia
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INTRODUCTION. xxiii 3. Genus Dkndra
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INTRODUCTION. xxv 5. Genus Ccelosmi
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INTRODUCTION. xxvii in the two prec
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; INTRODUCTION. xxix 23. Genus Pler
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; INTRODUCTION. xxxi 30. Genus Hete
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Page 142 and 143: 302 TABLE OF BRITISH FOSSIL CORALS.
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304 TABLE OF BRITISH FOSSIL CORALS.
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A. GENERAL INDEX;
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308 GENERAL INDEX.
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310 GENERAL INDEX.
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312 GENERAL INDEX. Dendrophyllia de
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314 GENERAL INDEX. . Halysites cate
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310 GENERAL INDEX.
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318 GENERAL INDEX.
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320 GENERAL INDEX.
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322 GENERAL INDEX. Xenia Zaphrentis
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