posterior. Lateral lobes on the anterior segments. Branchiae, three. The (smooth)
bristles begin on the fourth segment. Hooks, which commence on the fifth segment,
with one or two teeth above the main fang; the basal region elongated and convex
interiorly. The nephridia are separate from each other, and are somewhat short and
wide, those of the fifth segment having a longer tube (Hessle).
1. Polymnia nesidensis, Delle GHaje, 1828. Plate CXIY, fig. 6—body; Plate CXXVa,
figs. 5 — 5-6—bristles and hook.
Specific Characters.—Cephalic collar less developed than in T. nehulosa. Upper
lip large and frilled, and lower lip prominent, with a tongue-like process internal to
and above the latter. Eyes are absent in many preserved examples, but others show
numerous eyes behind the dorsal collar. Body rather small (40 mm. in length),-
terminating posteriorly in the vent, which has two longer median and two lateral cirri
on the ventral surface. Segments 50—80 two-ringed; two or three behind the buccal
have lamellas at their outer edges ventrally and opposite the first and second branchije.
Fifteen to sixteen ventral shields.1 Branchiae three, the first the larger, dichotomously
branched with short terminal divisions, so that the tips appear to be evenly truncated.
Setigerous processes seventeen, the first close to the last branGhia. Bristles in two series,
a longer and shorter, the former with broader wings. Bows of hooks commence on the
second bristled segment, a single row anteriorly, but a double row in segments 11—20.
The hooks are distinguished from those of T. nebulosa by the presence of a second tooth
above the great fang. Body and tentacles yellowish, dorsum brownish, or occasionally
dull greenish. Nephridia occur from the third to the eighth segment. Tube fragile,
covered with sand-grains and minute stones.
Synonyms.
1826. Terebella lutea, Risso. Hist. nat. l’Europe merid., t. iv, p. 409.
1828. Amphitnte nesidensis, Delle Chiaje, Mem., vol. iii, pp. 169, 179, Tav. xliii, figs. 2, 3.
1841- „ „ idem. Descriz., vol. iii, p. 69,,vol. v, p. 94, Tav. cv, figs. 2, 3.
1843—53. Terebella ,, Chenu. Illust. Couch., IIe livr., pl. v, fig. 4.
Ï848. Terebella lutea, Grube. Archiv f. Naturg., xiv, p. 114, Taf. iv, figs. 9, 10.
1851. j, nesidensis, idem. Fam. Annel., p. 81.
1855. ,, lutea, idem. Arch. f. Naturges., Bd. xxi, p. 116.
1861. „ „ idem. Ausflug. Triest., pp. 85, 128.
1864. „ „ idem. Insel. Lussin., p. 87.
1865. „ Danielsseni, Malmgren. Nord. Hafs.-Annul., p. 379, Tab. xxi, fig. 54.
« » abbreviata, De Quatrefages. Annel., t. ii, p. 363.
» „ nesidensis, idem. Ibid., p. 365.
1867. Polymnia Danielsseni, Malmgren. Annul. Polych., p. 108.
1868. Terebella flavescens, Claparède. Anuél. Nap., p. 396, pl. xxiii, fig. 6.
1869. „ Danielsseni, Grube. Abhandl. Schles. Gesell., 1868—9, p. 105.
abbreviata, idem. 1870. Arch. f. Naturges, 36 Jr., p. 334.
Bianc’ oF).ifteen ventral scutes, the first eight being short and wide, and the last triangular (Lo
1871.
1873.
1874.
1875.
1879.
1883.
1884.
1885.
1887.
1888.
1893.
1894.
1896.
1897.
1903.
1904.
1906.
1909.
1910.
1912.
1913.
1914.
1915.
Terebella lutea et Danielsseni, idem. Jahresber. Schles. Gesell., p. 50.
,, Danielsseni, Kupffer. Jahresb. Komm, deut., p. 152.
Polymnia „ Malm. Annul. Göteb., p. 97.
Terebella lutea, Panceri. Atti Soc. Ital. Sc. Nat., vol. xviii, p. 230.
,, Danielsseni, Tauber. Annul. Daniea, p. 131.
Amphitrite Danielseni, Levinsen. Vidensk. Meddel., p. 175.
Polymnia nesidensis, Marenzeller. Sitzb. K. Akad. Wissensch., p. 51, Taf. i, fig. 5 (sep. abdr.).
- • ; / „ Carus. Fauna Medifc., i, p. 265.
Terebella (Polhymnia) Danielsseni, Wii*en. Köngl. Sv. Yet. Akad. Handl., Bd. xxi, p. 18, etc.
Polymnia nesidensis, Meyer. Mitth. Zool. Stat. Neap., t. vii, pp. 634 and 636.
Terebella Danielsseni, Cunningham and Ramage. Trans. Roy. Soc. Edin., vol. xxxiii, p. 663>
pl. xliii, fig. 25.
Polymnia nesidensis, Lo Bianco, Atti R. Accad. Sc. Nap., vol. v, No. 11, p. 56.
,, ,, Bidenkap. Forhandl. Yidensk.-selsk. Christ., No. 10, p. 129,
„ „ De St. Joseph. Ann. Sc. nat., 7® ser., t. xvii, p. 225, pl. x, figs. 256—258.
Terebella Danielsseni, Appellöf. Berg. Mus. Aarb., xiii, p. 12.
Polymnia nesidensis, Michael sen. Polych. deutsch. Meere., p. 170.
,, „ Moore. Proc. Acad. Nat. Sc. Philad., p. 475.
„ „ Journ. M. B. A., vol. vii, p. 229.
-v „ - ,, De St. Joseph. Ann. Sc. nat., 9® ser., t. iii, p. .238.
„ . .,,; _• . Fauvel. Bull. Inst. Ocean., No. 142, p. 29.
.. ,,y , „ Lo Bianco. Mitt. Zool. St. Neap., Bd. xix, p. 584.
„ „ Fauvel. Ann. Sc. nat., 9® ser., t. x, p. 209.
" „ / Elwes. Journ. M. B. A., vol. ix, p. 63.
„ „ Crawshay. Ibid., vol. ix, p. 343.
Terebella'Danielsseni, Wollebask. Skrift. Selsk. Krist., Bd. ii, No. 18, p. 97, pl. xxix, figs. I—6.
Polymnia nesidensis, Ehlers. Deut. Südpol. Exped., p. 560.
,, ,, Southern. Proc. Roy. Irish Acad., vol. xxxi, No. 47, p. 124.
,, „ McIntosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 11.
•1Y 33 Allen. Journ. M. B. A., vol. x, p. 634.
,, ,, Rioja. Anei. Poliq. Cantäb., p. 57.
„ ,, Hessle. Zool. Bidr. Uppsala, Bd. v, p. 175.
Habitat.—Dredged in 110 fathoms 30 miles west of the Blasquet, S.W. Ireland,
1869 (J. Gr. J.). Not infrequently in Bressay Sound, in 8—10 fathoms amongst
tangle-roots; in 6—8 fathoms, West Voe of Scalloway (W. 0. M.). Plymouth (Spence
Bate, B. Rowe and Crawshay). Dredged amongst oysters, scallops and mussels in the
Great Roussel, Guernsey (W. C. M.) Common in Laminarian roots, Torquay (Elwes);
coast of Durham (G. S. Brady). Blacksod Bay and other parts on West Coast of
Ireland (Southern). A very attenuate fragment about 4 inches long amongst examples
of Notomastus latericeus from Plymouth (1908). Elsewhere it is found in Japan (Moore) ;
French coast (De St. Joseph). Extends to the Mediterranean and Adriatic (Delle
Chiaje, Grube, Claparède, Marenzeller, Fauvel) as well as to Sweden and Finmark
(Malmgren); shores of the North Sea and Baltic (De Quatrefages, Grube, Marenzeller) ;
South Polar waters (Ehlers).
The cephalic region has a less developed dorsal collar than in P. nebulosa, and