LANICE CONCHILEGA. 137 



Genus CXLVI.— Lanioe, Malmgren, 1865. 



Cephalic region with small dorsal collar, the sides expanding into great lateral flaps 

 which almost or completely meet in the mid-ventral line. The anterior margin of the 

 tentacular plate forms a spout-like border surrounding the mouth. Body typical. 

 Branchiae three finely-branched tufts on each side, more or less whorled toward the tip, 

 and situated on the first, second and third segments. Seventeen pairs of bristle-bundles 

 from the fourth segment backward. Hooks commence on the second bristled segment, 

 and range from eleven to twenty, biserial ; they continue to the posterior end. Ventral 

 scutes distinct. 



Marenzeller (1884) placed Lanice after Pista, which followed Leprea ; that again, in 

 turn, came after Amphitrite. 



1. Lanice conchilega, Pallas, 1766. Plate CXIIIa, figs. 2 and 2b — body; Plate CXIX, 

 figs. 8 — 8 e — structure and tubes ; Plate CXXVa, figs. 4 — 4 c — bristles and hook. 



Specific Characters. — Cephalic region as in the genus, the meeting of the lateral flaps 

 of the dorsal collar in the mid- ventral line perhaps being normal. Statocyst on each side 

 in the second segment. Body 270 mm. long, of a salmon-pink hue, except where the 

 vessels give a deeper red or the intestine a dull greenish tint. Ventral surface anteriorly 

 is deep red or brown, the tentacles pale pink, and the branchias dull red. Anus with 

 marginal papilla?. Ventral shields (fourteen to seventeen, Marenzeller) extend from the 

 lower lip almost to the termination of the bristles, each segment having its shield generally 

 divided transversely into two. A glandular belt occurs on each side in the line of the 

 bristle-bundles, and it extends considerably behind the bristled region. The third segment 

 has a greatly developed anterior lamella stretching from the edge of the ventral shield 

 almost to the second branchia. Anterior nephridia three on each side, the funnels 

 opening in the second, third and fourth segments. The posterior nephridia occur in the 

 sixth to ninth segments. Bristles with striated shafts, and a double serrated wing on 

 each side of the tapering tip. From the sixth to the ninth segment a small papilla exists 

 behind the bristle-tuft. Hooks present a stout base which narrows upward to the curved 

 neck, above which are the main fang and two teeth above it in lateral view ; biserial from 

 the eleventh to the twentieth segment. Tubes lined by secretion, covered by fragments 

 of shells, Foraminifera, gravel, fragments of Echinoderms, Balani and Serpulids, Avith a 

 dendritic free end, the fimbria? often being attached to two flattened basal plates or 

 lamina?. 



Synonyms. 



1766. Nereis conchilega, Pallas. Miscell. Zool., p. 1311, Tab. ix, figs. 14—22. 



1767. Sabella chrysodon, Linnaeus. Syst. Nat., edit, xii, p. 1269. 



1791. Terebella conchilega, Bruguiere. Encycl. Meth., pi. lvii, figs. 5 — 12. 



1803. Sabella chrysodon, Montagu. Test. Brit., vol. ii, p. 546. 



„ „ conchilega, idem. Ibid., p. 547. 



1806. Terebella „ Turton's Linn., p. 84, 



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