. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 392 Div. 3. ARTICjULATA.—ANNELIDES. Class 1. like the antlers of a stag. This is the Terebella bicornes, Abeldg., and the Actinia or Atiimal-fiower of Home. M. Savigny has made of it his subdivision oi f>crpules cx/mospires, \s\\k\\ JI. Blainville elevates to the rank of a penus. M. Laraarck distinguishes the Spirorbis, the branchial filaments of which are much less numerous (three or four only on each side); their tube is of a tolerably regular
. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 392 Div. 3. ARTICjULATA.—ANNELIDES. Class 1. like the antlers of a stag. This is the Terebella bicornes, Abeldg., and the Actinia or Atiimal-fiower of Home. M. Savigny has made of it his subdivision oi f>crpules cx/mospires, \s\\k\\ JI. Blainville elevates to the rank of a penus. M. Laraarck distinguishes the Spirorbis, the branchial filaments of which are much less numerous (three or four only on each side); their tube is of a tolerably regular spiral form, and they are mostly very small: such is S. spirellwn, Pallas, and . proiula, Nobis, or Paslula Rudolphii, Risso. Others have no membranous disk on the foreparts, and their branchial pectinations form two equal spires, the Sabelles simples of M. Savigny. Such are Amphritite reniformis, Mullei-, or Tubularia penicilliis, Id.; also Tere- bella reniformis, Gmelin, together with the Amphritite infundibulum, Montagu, and A. vesiculosa. Id. There are some with a double range of filaments on each pectination—the Sabellte Astart<e, Sav., such as <S. ffrandis, Cuv., or S. indica, Sav., and the Tubularia magnifica, Shaw. Others in which one pectination only is twirled, the others being smaller, iind enveloped within the base of the first. The ISabcUes spirographes, Sav., as jS. unispira, Cuv., and Spirographis Spallanzani, Jlart. In some the gills do not form a simple funnel round the month, but numerous filaments, which are serrated and strongly ciliated on the internal face; the silky feet of these are almost imperceptible—such is S. villosa, Cuv. Lastly, some have been described with six filaments disposed like a star—the Fabricia of Blainville. Terebella, Cuv.,— Like the greater number of species of Sabella, inhabit a factitious tube, but which is composed of grains of sand, and fragments of shells; their body has much fewer rings, and the head is difteren
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