. A catalogue of the British non-parasitical worms in the collection of the British Museum. Worms. 203 No. XXXVI. Sjno Jilicornis. filiform, or somewhat narrowed towards the tips. Length 8'"; breadth |"'. Nereis filicornis, Miill. Zool. Dan. Prod. no. 2640. Fabric. Faun. Grcenl. 307. Spio filicornis, Turt. Gmel. iv. 81. Lam. Anim. s. Vert. v. 319; 2nde edit. V. 559. Blainv. Diet, des Sc. nat. Ivii. 441. Oersted, Annul. Dan. Consp. 40; Grcenl. Annul. Dorsibr. 51. Hab. The Laminarian region. Desc. Worm rather compressed, narrowed backwards, of a yellow- ish-brown colour made dusky from
. A catalogue of the British non-parasitical worms in the collection of the British Museum. Worms. 203 No. XXXVI. Sjno Jilicornis. filiform, or somewhat narrowed towards the tips. Length 8'"; breadth |"'. Nereis filicornis, Miill. Zool. Dan. Prod. no. 2640. Fabric. Faun. Grcenl. 307. Spio filicornis, Turt. Gmel. iv. 81. Lam. Anim. s. Vert. v. 319; 2nde edit. V. 559. Blainv. Diet, des Sc. nat. Ivii. 441. Oersted, Annul. Dan. Consp. 40; Grcenl. Annul. Dorsibr. 51. Hab. The Laminarian region. Desc. Worm rather compressed, narrowed backwards, of a yellow- ish-brown colour made dusky from the contents of the intestine, pale or colourless at both ends, where it is speckled with blackish dots, irregular in their position and form. Head quadrate, the central lobe bifid at the apex. Tentacula about one-fourth the length of the body, of a straw-yellow colour, cornute-like, crenulate, obtuse at the point. Eyes placed between the insertions of the tentacula, the anterior pair widest apart. Segments about thirty in a specimen 6'" long, all nearly alike, the anal one apodous, terminated with two very short elliptical styles, and with a small obtuse lobe- like cirrus on each side ; hence Oersted describes the tail as being quadrifurcate. Feet becoming gradually smaller on the segments backwards. Branchial cirrus of the anterior segments longer than the foot, and exceeding the diameter of the body, thick and flattened, obtuse and rounded at the apex, where there is a dusky spot; the sur- face clothed with vibratile cilia. The inferior cirrus is shorter, rounded, and lobe-like. The bristles (No. XXXVI. fig. 1) are all simple, and collected into fan-shaped fascicles; those of the superior fascicle are shorter and stouter, divided at the apex into two minute sharp claws (crotchets, fig. 2) ; those of the inferior nume- rous, very slender and 1. Setaceous bristle. 2. Crotchets. 3. Elliptical bodies. 2. Sp. seticomis, the branchial cirri of the middle segments
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectworms, bookyear1865
