30 NEPHTHYS LONGISETOSA. 



Synonyms. 



1842. Nephthys longisetosa, CErsted. Kroyers Nat. Tids., iv, 2, p. 123. 



18 43. „ j} idem. Gronl. Dorsibr., p. 195, figs. 75 and 76. 



1851 • „ „ Sars. Nyt Mag. vi, p. 208 (Reise i Lofoten og Finmarken), 1849. 



1865. „ longosetosa, De Quatrefages. Annel. i, p. 428. 



» )) „ Malmgren. Nord. Hafs-Annul., p. 106, Taf. xii, fig. 20. 



1866-69. „ longisetosa, Packard. Mem. Bost. Soc. N. Hist., i, p. 293. 



1867. „ }J Malmgren. Annel. Polychget., p. 19. 



» » „ Parfitt. Cat. Annel. in Tr. Dev. Assoc, ii, pt. 1, p. 231. 



» ft longosetosa (Stimpson) Packard. Mem. Bost. Soc. N. H., p. 294. (?) 



1871. „ ,, Elilers. Annel. from Spitzbergen, Sitzungsb. Phys.-Med. Soc. 



Erlangen, iii, p. 79. 



1878. „ i} Marenzeller. Nordpol. Exped., Denkschr. Mat. -Nat. class d. Kaiserl. 



Akad. Wien, p. 395. 



1879. „ „ Yerrill. C. List U. S. Comm. Kept., p. 7. 



» 99 99 Hansen. Nyt Mag. f. Naturvid. (sep. copy), xxiv, p. 268. 



« 99 Malmgreni, Theel. Annel. Nouv. Zemb., p. 26, pi. i, f. 17 5 , and pi. ii, f. 17 10 . 



1881. „ „ Horst. Niederl. Arch. Zool., Suppl. Bd. i, 5, p. ]0. 



1883. „ 9i Levinsen. Syst. G-eogr. Nord. Annel (Vidensk, etc.), p. 216. 



1896. „ longisetosa, Michaelsen. Polych. deutscli. meere, p. 24. 



1 9 °0- „ „ Mcintosh. Ann. Nat. Hist., ser. 7, vol. v, p. 260. 



1901- „ „ Whiteaves. G-eol. Surv. Canada, No. 722, p. 82. 



Habitat— St. Magnus Bay, Shetland, 100 fathoms, and in 70 fathoms, Outer Haaf, 

 Skerries (J. G. J.). Station 8 in the Faroe Channel ('Knight Errant'). Station 10 in 

 the Faroe Channel ('Knight Errant'), March 2nd, 516 fathoms; August 24th, 82 

 fathoms. 'Porcupine,' 1870, 447 fathoms, No. 31; Sidi Ferrara?, 45 fathoms; 374 

 fathoms, No. 25. 



(Ersted's specimen came from Godthaab. Extends to the Atlantic shores of America 

 (Verrill), Strait of Magellan (Ehlers). Canada (W. CM.). Fragments were procured off 

 Anticosti in 100—210 fathoms, 1871, and off Port Hood, Canada, 1873, by Dr. Whiteaves. 



The head (Plate LVII, fig. 10) is somewhat shield-shaped, with a slightly convex 

 anterior margin. The anterior tentacles are marked off by a translucent stripe in front ; 

 and thus appear to rise considerably within the margin. They are comparatively long 

 and slender. The second pair are lanceolate and also long. The dorsal cirrus of the 

 first foot is remarkably large, its outline being lanceolate. 



The body is slightly narrowed in front, more so posteriorly, and distinguished by the 

 strong curved bristles which stand somewhat stiffly out on each side. Ventrally again 

 the enlarged lanceolate lamella formed by the ventral cirrus is characteristic. 



The proboscis in extrusion (Plate LVII, fig. 10) is distinguished by the well-marked 

 basal region; and the very numerous papilla in its distal rows, which are fifteen in 

 number. Malmgren states that there are but fourteen. Moreover, the latter author 

 also limits the number of the papillaB in these rows to seven, whereas they are much 

 more numerous in the present examples, viz. eleven to fifteen. 



When partly withdrawn, the organ in situ (Plate LVII, fig. 11) presents a button- 



