10 OPHELIA LIMACINA. 



enlarged as a lamella behind the bristles, and from it the long tapering branchia (dorsal 

 cirrus) extends, and is continued to the posterior end. Anterior segments 3-ringed, 

 posterior with a single transverse furrow. Proboscis forming a button-shaped process in 

 extrusion. Capillary bristles in two tufts, the dorsal considerably longer, but both curving 

 outward and backward as long, simple, tapering, longitudinally striated, and brittle 

 structures. Body diminishes abruptly posteriorly, and ends in a vent surrounded by 

 about a dozen short cirri, two on the ventral surface being much larger, and in life of a 

 deep red hue. Colour of a deep pinkish red (from the great vascularity), with purplish 

 iridescence of the surface. The segmental organs occur throughout the whole of the 

 "abdominal" region, and each has the form of a simple brownish tube with a ciliated internal 

 tunnel, and an external opening near the bristles (Claparede), within which it is dilated. 



Synonyms. 



1820. Ophelia bicomis, Savigny. Syst. Annel., p. 38. 



1825. Lumbricus radiatus, Delle Chiaje. Mem. degli Anim. II. pp. 414, 428, Tab. xxix, figs. 1 — 4. 



1834. Ophelia limacina, Audouin and Edwards. Hist. nat. litt. France, Annel., p. 267, PI. v B , figs. 7—9. 



1840. „ bicomis, GErsted. Krcyer's Naturh. Tidsskr., Bd. iv, p. 126. 

 „ „ mamillata, idem. Ibid., p. 126. 



1841. „ bicomis, Delle Chiaje. Descriz, vol. v, p. 99 ; pi. 100, figs. 1 — 6. 

 1843. „ „ CErsted. Ann. Dors., pp. 52, 204, f. 104-5, 115, 116 and 121. 



1843. Ammotrypane limacina, H. Rathke. Beitr. Fauna Norw. (Nova Acta Leop.-Car.), t. xx, p. 190, 



Tab. x, f . 4—8 ; Tab. xi, fig. 14. 

 1851. „ „ Grrube. Fam. Annel., pp. 70 and 135. 



„ Ophelia bicomis, Sars. Nyt Mag. f. Naturvid., vi, p. 207. 

 „ ,, mamillata, idem. Ibid., p. 207. 



1853. ,, limacina, idem. Ibid., vii, p. 381. 



1857. Ammotrypane limacina, Koren. Nyt Mag. f. Naturvid., ix, p. 94. 

 1859. „ „ Danielssen. Reise, 1858, Norske Vidensk. Skrift., iv, p. 119. 



1861. „ „ idem. Reise, 1857, Nyt. Mag. f. Naturvid., xi, p. 53. 



1865. „ „ Johnston. Cat. Worms Brit. Mus., pp. 217 and 344, fig. 41. 



„ De Quatrefages. Annel. II, p. 279. 

 borealis, idem. Ibid., p. 273. 

 1867. Ophelia limacina, Malmgreu. Annul. Polych., p. 74. 



1874. „ borealis, De Quatrefages. C. R. Assoc. Franc., 1873, p. 653. 

 ., „ limacina, Mcintosh. Ann. Nat. Hist., ser. 4, vol. xiv, p. 201. 



1875. „ „ idem. Invert, and Fishes St. Andrews, p. 124. 

 „ „ ,, Elders. Zeitschr. f. wiss. Zool., Bd. xxv, p. 23. 



1878. „ „ Mcintosh. Trans. Linn. Soc, ser. 2, Zool., vol. i, p. 505. 



1879. „ „ Tauber. Annul. Danica, p. 107. 



„ „ „ Theel. Kongl. svenska Yet.-Akad. HandL, Bd. 16, p. 48. 



1881. „ acuminata, Leslie and Herdman. Proc. Roy. Phys. Soc. Edinb., vol. xi, p. 275. 



1883. „ limacina, Wiren. Cheetop. Sibir. och Berings Haf, 'Vega' Exped., p. 406. 



1884. „ „ Webster and Benedict. Rep. Comm. Fish and Fisheries U.S.A. for 1881, 



p. 724. 

 ,, „ „ Levinsen. Vidensk. Meddel. Foren. Kjobenh., p. 119. 



1885. „ bicomis (nervous syst.), Pruvot. Arch. Zool. exper., 2 e ser., t. ii, p. 308, pi. xv, figs. 1-2. 



1886. „ coarctata, Harvey Gibson. Proc. Lit, and Philos. Soc. Liverp., vol. xl, p. 155. 



1887. „ limacina, Kukenthal. Jenaische Zeitschr., Bd. xx, p. 532, Taf. xxxh, figs. 22-24. 



