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SAMYTHA SEXCIBKATA. 79 



1865. Samytha sexcirrata, Malmgren. Nord. Hafs.-Annu]., p. 370, Tab. xx, fig. 49. 



1867. „ „ idem. Annul. Polych., p. 106. 



1868. Sabellides „ Sars. Vidensk. Selsk. Forhandl., p. 10 (sep. abdr.). 

 1871. Samytha „ Grube. Schles. Gesell. (1870), p. 79. 



1873. a „ Yerrill. Americ. Journ. Sc. and Arts, ser. 3, vol. v. Results of recent 



Dredgings on coast of N. England. 



1874. „ „ Malm. Annul. Goteb., p. 95. 

 1879. Sabellides sexcirrata, Tauber. Annul. Danica, p. 129. 



„ Hansen. Norsk. Nord. Exped., 1876 — 78, vol. iii, p. 14, etc. 



„ Levinsen. Oversgt. norsk. Annel., p. 164. 



„ idem. " Hauchs " togter, p. 348. 



„ Bidenkap. Christ. Vet.-Akad. Forhandl., p. 124. 



„ Appellof. Bergens Mus. Aarb. (1894 — 5), p. 12. 



„ Michaelsen. Polych. deutsch. Meere., p. 166. 



„ Fauvel. Bull. Inst. Ocean., cxlii, p. 23. 



„ Ditlevsen. Annul. Polych. Norw. Arct. Exped., vol. iii, No. 15, p. 16. 



„ Percy Moore. Proc. U.S. Nation. Mus., vol. xxxvii, p. 140. 



„ Meyer. Inaug. Dissert. Kiel., p. 22. 



„ Samytha sexcirrata, Wollebaek. Skriv. Vid.-Selsk. Krist., No. 18, p. 60, pi. xi, figs. 1 — 9. 



1914. „ „ Fauvel. Campag. Scient. Monaco, Fasc. xlvi, p. 286. 



v » „ Mcintosh. Ann. Nat. Hist., ser. 8, vol. xiii, p. 102. 



1917. „ „ Hessle. Zool. Bidr. Uppsala, No. 5, p. 113. 



Dredged in St. Magnus Bay in 100 fathoms by Dr. Gwyn Jeffreys in 1867. Extends 

 to Canada, where it was dredged in 220 fathoms between Anticosti and the south shore 

 (Whiteaves), and probably to the Antarctic seas. Norway and Sweden (Sars, Malmgren) ; 

 New England and Atlantic Coast, U.S.A. (Verrill). Arctic Seas. 



Head (prostomium) forms a somewhat broad anterior median process with a peri- 

 stomial buttress on each side. Beneath is the flap bearing ventrally the buccal tentacles, 

 which are smooth, and somewhat enlarged distally. The posterior lip is prominent, 

 and passes upward at each side as a process separated from the cephalic border by a 

 notch. When viewed laterally it forms a projecting spout-shaped frill. The segment 

 behind the buccal has no processes. The third and fourth segments carry dorsally the 

 branchiae, which are three on each side, and comparatively long, tapering (subulate) 

 organs. In the Canadian forms they are nearly half the length of the body in the 

 preparations. 



Body somewhat clavate in outline, though a slight narrowing occurs anteriorly 

 from the eighth foot forward, and behind this it diminishes to the tail, which' presents a 

 single, thick, short, lateral cirrus on each side. The dorsum is smoothly rounded 

 throughout, whilst the ventral surface is marked from the mouth to the tenth bristled 

 segment by a thickened glandular layer in each segment. Then a groove appears in the 

 middle line and is continued to the tip of the tail. In a large specimen the vent presented 

 a notch dorsally with a crenate edge beneath, and in a perfect Canadian example in a 

 tube a short cirrus occurred on each side. Malmgren's specimens had been imperfect. 

 External to the branchiaB is the small first setigerous process, which bears a tuft of 

 bristles. This and the next two are rather dorsal than lateral, but they soon become 



