202 HATTCHIELLA TRIBULLATA. 



seventh and eighth segments and traces of small papillae in the same situation on the two 

 preceding and some of the succeeding segments. Nephridia in the third, fourth, fifth 

 and seventh segments. Neither bristles nor hooks. The small ventral shields are 

 continued to the posterior end. Dorsally in the anterior segments are small glandular 

 papillae. Appears to be an inhabitant of sand. 



Synonyms. 



1869. Polycirrus tribullata, Mcintosh. Trans. Eoy. Soc. Edin., vol. xxv, p. 424. 

 1893. Hauchiella Peterseni, Levinsen. Annel., etc., " Hauch's " togter, KjVbenhavn, p. 351. 

 1896. „ „ Appellof. Bergeos Mus. Aarb., 1896, No. 13, p. 12, 



,, „ „ Michaelsen. Polych. deutsch. Meere, p. 176. 



1912. „ „ Wollebaek. Skrift. Yidensk. Kristiania, Bd. ii, p. 74, pi. xv, figs. 1 — 5, 



and pi. xvi, fig. 5. 



1913. Lysilla inermis, Ehlers. Polych. Sudpolar-Exped., p. 567, Taf. xliv, figs. 14 — 16. 

 1915. Polycirrus tribullata, Mcintosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 38. 



1917. Hauchiella Peterseni, Hessle. Zool. Bidr. Uppsala, No. 5, p. 233. 



Habitat. — Dredged in 90 fathoms off North Unst,' Shetland, in July, 1867 (Dr. Gwyn 

 Jeffreys). 



Abroad it has been found in the Kattegat (Levinsen), off Bergen, in 30-300 m. 

 (Appelloff, Wolleba3k and Hessle), Kattegat and Kaiser Wilhelm-II-Land (Ehlers), 

 Falkland Islands, and South Georgia, Moranenfjord (Hessle). 



The cephalic region (Plate CXXXVIII, fig. 13 a) presents a deeply folded lobe split 

 ventrally, and bearing numerous grooved tentacles, short, thick and club-shaped. 



The body (Plate CXXXVIII, fig. 13) is somewhat fusiform, the middle being 

 swollen, whilst the ends taper, especially posteriorly. It measures in spirit about 

 f of an inch, the Norwegian examples being about 1J inches, and anteriorly has 

 two-ringed segments, is rounded dorsally, grooved ventrally, and marked by two latero- 

 ventral ridges (ventral longitudinal muscles). The skin has a minutely granular aspect 

 under a lens, and neither bristles nor hooks are present. Three well-marked, circular, 

 flattened processes with a papilla in the centre occur (Plate CXXXVIII, fig. 13 6) on the 

 sixth, seventh and eighth segments, and a minute papilla is visible on each side of the 

 two segments in front, but only a trace of an elevation in those behind these circular 

 processes. No veutral plates are present, only a raised central line. 



The Hauchiella Peterseni of Levinsen seems to be this species, the author noting 

 that the three circular, flattened processes with the papilla in the centre are the 

 nephridial papillas. It is also entered by Appellof in his faunistic paper. The same 

 form is described by Wollebeek with good figures. 



Ehlers (1913) mentions what probably is the same form from the Antarctic Sea, 

 the nephridial processes and the papillse of the segments behind being regarded as 

 rudimentary feet. The terminal anus presents two papilla3. 



