154 



AET. II. — A. IZUKA : 



the lip of dorsal ramus ; inferior ligula stont and conical, so 

 long as the lip of ventral ramus. Bristles in part with falcate, 

 and in part with short setose, end -piece. Dorsal cirrus filiform, ex- 

 tending far beyond the ligula ; ventral cirras also filiform, arising 

 from the base of parapodium, and not extending beyond inferior 

 ligula. Anal segment simple, short and conical. 



Proboscis short ; paragnathi small : I. 1 (or 2) ; II. in a double 

 row ; III., lY. crowded ; V. absent ; VI. in short double rows ; VII., 

 VIII. in double transverse rows, of which the anterior row consists 

 of paragnathi larger than those of the posterior row. Maxillae 

 slightly serrated, with 10 teeth. 



Habitat : — Chöshi " in Prov. Shimosa (!) ; Misaki in Prov. 

 Sagami (!). 



Nereis pelagica L. 



PI. XVII, fig. 1—6. 



1758. Nereis pelagica, Linné. Systema Naturae, Ed. X, p. 654. 

 1771. Die warzige Nereide, O. F. Müller. Von Würmern, p. 140, 



Taf. 7. 



1843. Nereis pelagica, Oersted. Grönlands Annnlata dorsibranchiata, 



p. 23. 



1805. Nereis pelagica, Johnston. Catalog., Brit. Worms p. 148. 



1865. ,, „ Qnatrefages. Histoire des Anneies I, p. 542. 



1868. ,, ,, Ehlers. Die Borstenwürmer, p. 511. 



1776. „ veiTUcosa, O. F. MüUer. Prodromus Zool. Dan., p. 217. 



1780. ., „ O. Fahricius. Fauna Grönlandica, p. 292. 



1879, „ pelagica, Mareuzeller. Südjap. Annel., p. 14. 

 1890. ,, „ „ . Bering Annel., p. 2. 



1903. „ „ Moore. Proc. Acad. Nat. Sc. PLilad., Vol. LY, 



10. 431. 



