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Show 450 ANN ELIDES. SAllELLA, Cuv.(l) The same kind of body, and similar flabelliform branchire, as the Serpulre; but the two fleshy fil~ments adh~ring to these branchire both terminate in a point, and w1thout formmg an operculum; sometimes they are even wanting. The tube of the Sabellre is most commonly composed of granules of clay or mud, and is rarely calcareous. The species known are large, and their fan-like branchire remarkable fo1· their delicacy and brilliancy. Some of them, like the Serpulre, have a membranous disk on the anterior part of the back, through which pass the first pairs of the bundles of setre; their pectiniform branchire are spirally contorted, and their tentacula reduced to slight folds(2). Sab. protula, Cuv.; Protula Ruclolphii, Risso. A large and splendid species inhabiting the Mediterranean. Its tube is calcareous like that of the Serpulre, its branchire orange co· loured, &c.(3) Others have no memb1·anous disk anteriorly; their two pectiniform branchire are equal and spiral( 4 ). There are sometimes two ranges of filaments on each comb(s). In others again, only one of the two combs is thus formed; the other, which is smaller, enveloping the base of the first,-Sabella unispi1'a, Cuv.; Spi1'ographis Spallanzanii, Viviani, Phosph. Mar., pl. iv, v( 6). ( 1) This name, in the works of Linn reus and Gmelin, designates various ani· mals with factitious, and not tr~nsuded, tubes; we restrict its application to thos.e which resemble each other in their peculiat· characters. M. Savigny employs 1t in the latter way, our first division excepted, which he places among his Serpulce. Our Sabella: are the AliU'IllTlllTES of Lamarck. (2) This division is left by M. Savigny among the Serpula:, and constitutes his SERPUL.lE S.PIRAMELL.lE, of which M. de lllainville has since made his genus SPIRA· MELLA. (3) The existence of this magnificent species, and the calcareous nature of its tube are incontestable, notwithstanding the doubt expressed in the Diet. des Sc. Nat.: LVli, p. 443, note. The Sabella bispi1·alis,-.fl.mpltitrite volutacornis, Lin. Trans., VII, vii, differs but slightly from it. I clare not assert it is the same as Seb., I, xxix, 1, erroneously cited by Pallas and Gmelin under Serpula gigantea, for that figure shows no disk. (4) The simple SADELJ.J"E of Savigny, .fl.mpMtrite reniformis, Mull., Ver., XVI, or Tubttlaria penicillus, Id., Zool., lxxxix, 1, 2, or Terebella reniformis, Gm.;. fl.mph. infundibulum, Montag., Lin. Trans, IX, viii;-.fl.mplt. vesiculosa, Id. lb., XI, v. , (5) The SABELLlE AsTAltT.lE, Savig., such as the Sabella grandis, Cuv., or lndtca, Sav. ;-Tubularia magnifica, Shaw, Lin. Trans., V, ix. (6) The SAnELL.lE SPmOGllAl'IIIC.IE, Savigny. TUBICOL.IE. 451 There are some whose branchire merely form a simple funnel round the mouth; their filaments, however, arc numerous, crowded and strongly ciliated on the internal surf~ce(l) . . Their silky feet ar: almost imperceptible. Finally, others have been described which have but six filaments arranged m. a stellate form(2). ' TEREBELLA, Cuv.(3) The Terebellre, like most of the Sabellre, inhabit an artificial tube, but it is composed of grains of sand and fragments of shells; their body, moreover, has fewer rings, and their head is otherwise decorated. Numerous filiform and extremely extensible tentacula surround their mouth; their branchire, placed on the neck, are not infundibuliform, but resemble arbusculre. Several species are found on the coast of France, long confounded under the name of Terebella concltilega, Gm., Pall., Miscel., IX, 14-22, most of which are remarkable for tubes formed of large fragments of shells, the edges of their opening being prolonged into several little branches, composed of similar materials, and containing the tentacula. In the greater number there are three pairs of branchi~, which, in those where the tube is b1·anchcd, issue through a peculiar hole formed for that purpose( 4). N.B. On account of the imperfection of the figure of Ellis, Coral., pl. xxxiii, 1 do not know to which of these subdivisions we should refer the Jlmpltitrite ventilalrrum, Gm ., or Sabella penicillus, L., Ed. XII. (1) 8ab. villosa, Cuv., a new species. (7) Tubularia Fabricia, Gm., l<~abr., Faun, Grcenl., p. 450-the genus FAnurcu., Dlamv. (3) Linna:us, in his twelfth edition, had thus named an animal described by Kiehler, and which might have belonged to this genus because it was thought to perforate stones. Lamarck has employed the same name-An. sans vert., p. 324, ~or a Nereis and for a Spio. The Terebellm, Gm., comprehend .fl.mpltinomm, Nerezdes, Serpulm, &c. Messrs Savigny, Montag., Lamarck, and Blainville, em. ploy this name as above, which was proposed by me, Diet. des Sc. Nat., It, p. 79. (4) They are the simple TEREB!LLJE of Savigny, such as: Tereb. medusa, Sav., Eg., Anne!., I, f. S;-Ter. cirrltata, Gm., Mull., Ver., XV;-Ter. gigantw, Montag., Lin. Trans., XII, 11;-T. nebulosa, Id. lb., 12, 2;-T. constrictor, Id. lb., 13, 1;-T.venusta,Ib., 2; he also calls one of them T. ci?-rltata, lb., XII, 1; but which does not appear to be the same as that of Muller. Add T. variabilis, Risso, &c. N.B. M. Savignymakes two other divisions of Terebellre, the T. PHYZELIJE, which have but two pairs of branchia:, and the T. InALI.IE, that have but one pair. Among the latter would come the .fl.mphitrite cristata, Mull., Zoo!. Dan.,lxxi, 1, 4; .!lmplt. ventricosa, Bose., Ver., I, vi, 4-6. |