EUNICE NORVEGICA. 435 



It bears the tentacular cirri. Colour pale brown, iridescent. Proboscis with strong 

 maxillae, the curve of which is rather flat, whilst the tips rise little above the horizontal. 

 A marked shoulder exists posteriorly, internal to which is a longitudinal ridge which 

 alternates with that of the opposite side and interlocks. The maxillae articulate with 

 spatulate processes posteriorly. Great dental plates have seven teeth— largest in front. 

 Left azygos plate has nine teeth, and the curved plate adjoining six teeth, and there are 

 also two separate brown denticles. Right anterior curved plate has ten small teeth, and 

 a larger and a smaller denticle continue the series as on the left. On the ventral surface 

 is a slender horny bar between the anterior curved plates and the great dental. 

 Mandibles with a denticulated anterior edge to the white oral plate; posterior limbs taper 

 to a blunt point, and are brownish grey with a darker internal edge. Branchiae com- 

 mence as short subulate processes on the fourth foot — as a rule. Three divisions occur 

 on the eighth foot. The twelfth foot has only two. Those following generally have two, 

 occasionally three, then diminishing to one ; they cease about the fortieth foot. The 

 highest number of branchial filaments noticed was four, but in some young specimens it 

 was three. The typical foot has dorsally the cirrus of moderate length, with the bifid or 

 trifid branchiae. The setigerous region is bluntly conical, supported by two black spines 

 (pale in young examples). Dorsal bristles, long and simple, flattened and widened before 

 tapering to the delicate tip ; also a series of brush-shaped forms. Ventral bristles have 

 a short, bifid, terminal piece, considerably narrower than the dilated end of the shaft. 

 The large posterior hooks have a powerful terminal fang and a strong spike above it. 



Synonyms. 



1767. Nereis norwegica, Linneus. Syst. Nat., ed. 12, i, pt. 2, p. 1086. 



1768. „ madreporse pertusx, Ghmner. Trondhj. Selsk. Schrift., iv, pp. 41 — 51, Tab. 2, f. 6 — 12. 



Ibid. Mus. Kircher, Class 12, p. 412, f. 8, 9, 10. 

 1776. „ pennata, 0. F. Miiller. Zool. Dame. Prod., p. 217, No. 2630. 



„ „ pinnata, idem. Ibid., p. 217, No. 2629. 



1788. „ pennata, idem. Zool. Danica, i, p. 30, Tab. xix, f. 1 — 3. 



„ „ pinnata, idem. Ibid., p. 31, Tab. xix, f. 4 — 7. 



1791. „ ,, Linn. Syst. Nat. (Gmelin), ed. 13, i, pt. 6, p. 3116. 



1806. „ norvegica, Turton/s Linnasus, iv, p. 87. 



„ „ pinnata, idem. Ibid. 



1818. Leodice norvegica et N. pinnata, Lamarek. Anim. s. Vert., 1st edit., v, p. 323 ; 2nd edit, v 



pp. 562, 563. 

 1820. „ norwegica, Savigny. Syst. Anim., p. 51. 



1827. Leodice pinnata, Bruguiere. Encycl. Meth., Vers, i, p. 134, Tab. lvi, f. 1 — 4. 



1828. Nereidonta norvegica, De Blainville. Diet. Sc. Nat., lvii, art. Vers., p. 476. 

 „ „ pinnata, idem. Ibid., p. 476. 



1834. Eunice norvegica, Audouin and Edwards. Annel., p. 145. 



1835. ,, „ Sars. Beskriv. og Iagtt., p. 48. 

 1836 — 7. ,, „ Cuvier. Regno Anim., iii, p. 100. 



1844 — 5. „ norwegica, CErsted. Kroyer's Nat. Tids., Bd. i (Dr^bak), p. 406, pi. v, f. 13 15. 



1851. „ „ Grube. Fam. Annel., pp. 44, 123. 



„ „ norvegica, Sars. Nyt Mag. f. Naturvid., vi, p. 209. 



