1841. Pectinaria auricoma, Delle Cliiaje. Descriz., t. v, p. 96.
1859. „ gromlandica, Danielssen, Reise, 1858, Norske Vid.-Selsk. Skriv., i 19de Aarli.,
Bd, iv, Heft. 2', p. 123'.
1865. Lagis Koreni, Malmgren. Nord. Hafs.-Annul., p. 360.
1867. ,, „ idem. Animlv Polych., p. 104, pl. xifi, fig. 74.
1868. Pectinaria Neapolitana (partim), Clapai’ede. Aiinel. Nap., p. 373, pl. xxviii, fig. 1.
1869. Lagis Koreni, Grube. Mitt.vSt. Yaast, p. 37.
1871. Pectinaria Koreni, idem. ScMes. Gesell. (1870), p. 73, sep. abdr., p. 5.
- ,, Mahngreni, idem. Ibid. (1870), p. 74.
■ „ „ neapolitana, idem. Ibid. (1870), p. 73.
1873. ,, belgica, Möbius. Wirb. Th. Ostsee, p. 109 (Kupffer), 1873.
1874. Lagis Koreni, Marenzeller. Verh. K. K. Zool.-Bot. Gesells. Wien., xxiv, p. 217.
„ „ ;,' idem. Sitzb. Akad. Wieii, lxix, p. 68, pl. vii, fig. 5.
„ Pectinaria belgica, McIntosh. Ann. Nat. Hist., ser. 4, völ. xiv, p. 204.
1875. ,, neapolitana, Panceri. Atti Soc. Ital., Vol. xviii, p. 530.
„ Lagis Koreni', Ehlers. Zeitsch. f. wiss. Zool., Bd. xxv, p. 27.
,, „ , belgica, McIntosh. Invert, and Fish. St. Andrews, p. 128.
1878. ,, ,, Lenz. Jahrb. Deutsch. Meere., p. 11.
1883. „ Koreni, Levinsen. Vidensk. Meddels., 1883, p. 153.
1885. Lagis Koreni, Oarus. Fauna Medit., p. 260.
1888. Pectinaria belgica, Cunningham and Ramage. Trans. Roy. Soc. Edin., vol. xxxiii, p. 656,
pl. xlii, fig. 20.
1890. Lagis Koi'eni, Levinsen. Annel. “Hauchs” togter, 1883—6, p. 346.
„ ? Pectinaria belgica, Malaquin. Ann£l. Bou’lon., p. 48.
1891. „ is Hornell. Trans. Biol. Soc. Liverp., vol. v, p. 260.
1893. Lagis Koi'eni, Bidenkap. Annul. Polych. Hardangerfioi*de, p. 9.
1894. ,, McIntosh. Ann. Nat. Hist., ser. 6, xiii, p. 12.
„ Pectinaria Koi'eni, Bidenkap. Forli. Yidensk.-Selsk. Christ., No. 10, p. 119.
1896. ,, „ Appellöf. Berg. Mas. Aai'b., p. 12.
1897. Lagis Koreni, Fauvel.- Comp. Rend., t. cxxv, p. 6l6.
„ Pectinaria Koreni, Michaelsen. Polychset. Deut. Meere., p. 46.
/,y Y >> » idem. Ibid., p. 162.
1898. ,, belgica, De St. Joseph. Ann. Sc. nat., 8® ser., v, p. 405, pl. xxii, figs. 209—222,
and pl. xxiii, figs. 223—235.
,, — ;, Koreni, Lönnberg. Meddel. Kungl. Landbrat., No. 1.
1903. „ „ idem. Ibid., No. -2.
1904. Lagis Koreni, Journ. M. B. A., vol. vii, p. 230.
1909. ,, ,i • Fauvel. Bull. Inst. Ocean., cxlii, p. 21.
„ „ „ idöm. Ann. Sc. nat., 9® ser., t. x, p. 2Ö9.
1911. ? Pectinaria belgica, Riddell. Proc. Liverp. Biol. Assoc., vol. xxv, p. 63.
1912. ,, Koreni, Wolleboek. Skriv. Vid.-Selsk. Krist., No. 18, p. 40, pl. v, figs. 7—9.
1913. ,, ' {Lagis) Koi'eni, Arnold Watson. Rep. Brit. Assoc., p. 512.
1914. Lagis Koreni, Southern. Proc. Roy. Irish Acad., vol. xxxi, No. 47, p. 130.
,, ,, „ McIntosh. Ann. Nat. Hist., ser. 8, völ. xiii, p. 89.
1915'. „ ,, Southern. Irish §'e. Invest., No. 3, p. 47.
„ „ „ Allen. Journ. M. B. A., vol. x, p. 637.
1917. Pectinaria Koreni, Rioja. Anel. Poliq. Cantab., p. 44.
„ Hessle. Zool. Bidr. Uppsala, No. 5, p. 80.
habitat.—Found abundantly—both living and dead-^-on the West Sands, St.
Andrews, after storms, which ^evidently displace it from the sand beyond low
w.afer,mark (E. M.). In the Knoll ff. A J.). Stomach of founder and plaice,
S:t. Andrews Bay (E. M.). Montrose Bay (Dr. Howden). Blacksod Bay and
Bajlynakill Harbour (Southern). Extends along both shores of Britain from Shetland
to Plymouth.
Abroad it occurs in Norway, on the Atlantic shores of France (De St. Joseph) in
Finmark (Malmgren). Adriatic (Grube) and Mediterranean (Claparède). Calvados
(Fauvel). Kieler Bwcht (Michaelsen). St. Vaast-la-Hougue (Fauvel).
The cephalic region (Plate CXII, fig. 2, and Plate CXVIII, fig. 6) is provided with
a transverse series of fifteen lustrous golden paleolse on each side. Each is a flattened
hollow chitinous process tapering to a delicate tip which is always more or less curved
toward the dorsum (Plate CXXIV, fig. 3), the concavity of the curve or coil being
minutely crenuiate as if from a thinner tissue on that side. Moreover, the point of those
in the middle of the series is continued as a long and delicate process, generally coiled.
The outer in each series is short, broad at the base and with a long tapering tip, not
coiled. The paleolæ are finely, striated longitudinally and also marked by transverse
lines.. The second external paleola has its transverse lines arranged in distinct ringed
belts, and not scattered indiscriminately. In viewing the paleolæ of each side as a whole
the distal curve of the outer forms is more marked than that of the inner, and the inner
are deeply set in the tissues and moved by powerful muscles, whereas the external
paleolæ are less deeply implanted. The bases of the paleolæ have a slight obliquity,
being directed downward and outward on each side. In transverse section the flattened,
hollow condition of the paleolæ is apparent. Moreover, they became much thinner and
more flattened toward the base. They are hard, though somewhat brittle, and the edge
of the razor is often notched in making sections.
When withdrawing itself into the tube the two rows of golden paleolæ slightly and
symmetrically overlap, for they can both be separated and approximated, and the firm
smooth area in front of them forms a platform, the whole performing the part of an
operculum. In the living condition in its tube the animal sometimes moves gently
outward and inward, the paleolæ overlapping as it passes inward with a motion similar
to what might be done if, with the wrists fixed, the hands be spread out, then the fingers
brought together and one hand moved over the other.
The anterior dorsal edge above the paleolæ is smooth, firm and somewhat hollow,
with a marginal rim which forms more than a semicircle externally and it ends in a
subulate tentacle ventrally. A notch separates the latter from the veil or frilled membrane
to the ventral surface of the paleolæ, and the edges of the muscular membrane bear a
series of long papillæ or fimbriæ. This membrane is not attached dorsally to the
ventral edge of the rows of paleolæ, a firm, transversely elongated area occurring at
their base.
Below and attached to the foregoing veil is a dense series of red-streaked tentacles
on each side of the mouth which has a dorsal fold in the middle line and a transverse one
behind it. In the median line ventrally is a large central boss, and on each side is a fillet
continued upward by a ridge to the long lateral cirrus in front of the branchiæ. The