NEPHTHYS HOMBEEGII. 



19 



1879. 



1883. 



1885. 



1886. 

 1886- 

 1890. 

 1891. 

 1893. 

 1894. 

 1896. 

 1900. 

 1901. 

 1902. 

 1904. 

 1905. 

 1906. 



Nephthys scolopendroides, Marion and Bobretzky. Ann. So. Nat. 6 e ser. viii, Art. No. 7, p. 16, 



pi. xv, fig. 2. 

 „ Hombergii, Levinsen. Yidensk. Meddel. Foren Kjobenh., p. 217 (Syst.-geogr. Overs. 



Annel. nord., p. 60). 

 scolopendroides (Hombergii), Prnvot. Arch. Zool. Exper., 2 e ser., iii, p. 225. 

 „ Cams. Fauna Med., p. 223. 



„ Jaquet. Mitth. Zool. Stat. Neap., vi, p. 364 and pi. xxii, fig. 75 — 81. 



longisetosa, Harvey Gibson. Verm. Liverp., p. 152. 

 7. ,, scolopendroides (struct, muscles), Emery. Mitth. Zool. Stat. Neap., vii, p. 371, p. xiii. 



Hombergii, Malaquin. Annel. d. Boulon., p. 33. 



„ Hornell. Trans. Liverp. Biol. Soc, vol. v, p. 244. 



assimilis, Levinsen. Vidensk. Ud. " Hauchs," p. 337. 



Hombergii, De Saint Joseph. Ann. Sc. Nat., 8 e ser. xvii, p. 3, pi. i, figs. 1 — 13. 

 scolopendroides, Boule. Camp. ' Caudan/ p. 449. 



„ Mcintosh. Ann. Nat. Hist., ser. 7, vol. v, p. 258. 



„ idem. Ibid., vol. viii, p. 222. 



„ Marenzeller. Polych. Grund., p. 12. 



Hombergii, Allen. Journ. M. B. A., n. s., vol. vii, p. 225. 



scolopendroides ( = N. longisetosa Johnst.), Grraeffe. Arbeit. Zool. St. Triest, xv, p. 322. 

 Hombergii, Fage. Ann. Sc. Nat., 9 e ser., iii, p. 287, figs. 11 — 14. 



Habitat. — From Shetland to the Channel Islands — along both shores, and occnrring 

 alike in the tidal region and in deep water. W. coast of Ireland. Dredged at a depth of 

 96 fathoms in the ' Porcupine ' Expedition of 1S69. 



Frequent on the French shores, and in the Mediterranean. Rare on the shores of 

 Sweden and in the Baltic (Malmgren). Madeira (Langerhans) where it frequents water 

 from 10 to 20 fathoms in depth. 3 — 400 metres (Roule) ' Caudan ' in the Gulf of 

 Gascony. 



Head pentagonal (Plate LVII, fig. 8), more elongated than in N. cseca, and with 

 very well marked tentacles. 



In the preparations no sense-organ or ciliated papilla is observable. Ehlers states 

 that it is present on each side in the converging groove. The lobes at the sides of the 

 mouth are more pointed. Delle Chiaje gives his form two distinct eyes, and though such 

 are not often seen, yet in a good example from St. Magnus Bay, they are present at the 

 base of the anterior tentacles (Plate LVII, fig. 8). 



The peristomial segment has the foot divided into a dorsal and a ventral division, 

 each of which has a spine-papilla and the two kinds of bristles. The dorsal cirrus is 

 minute, but the ventral is large. The long dark bristles are directed forward on each 

 side of the head. 



The branchiae begin on the fifth foot (St. Joseph says fourth segment). 



The Body has similar proportions to that of iV. cseca, but is considerably less, no 

 example yet met with having attained the proportions of the species just mentioned. It 

 is iridescent pinkish in life, bluish-white along the median line dorsally and whitish 

 laterally, with bright red branchiae along the sides. 



The proboscis (Plate LVII, fig. 6a) in extrusion presents similar rows of papillae 

 dis tally to those in N. cmca, but the last or terminal of the median dorsal is considerably 



