Genus CXXXIX—Amphicteis, Grube, 1860. (Amphiteiti, Sars, 1835.)
Shield-like cephalio lobe bounded by a prominent lobe (palp, Fauvel) on each side,
which follows the shape of the shield posteriorly, median groove anteriorly. Nuohal
organs cushion-like. Tentacles smooth. Body enlarged anteriorly, tapering posteriorly.
Second segment (buccal) short, naked. Third segment large and prominent, with a
transverse division inferiorly, and bearing at each side the fascicle of .pale®. Branchi®
subulate, four on each side, arising from the third, fourth, and fifth segments. Bristled
segments seventeen, commencing on the fourth (third, Hessle). Uncinigerous pinnules
begin on the seventh and extend to the segment in front of the anus. No distinct cirri
on the feet. Anal segment with two cirri. Capillary bristles with curved and tapered,
tips arising from a subeylindrical base. Hooks commence on the sixth segment, uniserial
subtriangular, rounded, five to six long teeth. Stomach with -internal diverticula. No’
ventral glands. Four to five pairs of similar nephridia, short and wide, the anterior
smaller than the posterior; the apertures in the fourth segment do not open dorsally.
Diaphragm between the fourth and fifth segments and Tube composed of mud. between the fifth and sixth.
1. Amphicteis Gunneri, Sars, 1835. Plate CXVIII, fig. 7—body; Plate CXXIY
figs. 5—5 6 palea, bristles and hooks.
Specific Characters. PaJmul® (eight to twenty) flattened, with a long tapering
apex. Tentacles about twenty, smooth. Body 30 nunr-long, and 3 mm. across feet.
Segments 34—35, ventrally grooved. Branchi® filiform, four on each side, on third
and fourth segments. Posterior region with fifteen hook-lamin®, and terminating
in two anal cirri. Feet with a clavate papilla at the ventral edge distally. Capillary
bristles with curved tips and wings striated at the base. Middle part of hook broadest,
with six teeth. Nephridia in fourth to seventh segments. Colour pale yellow, roseate
ventrally, with the brown stomach and greenish blood-vessels shining through. The
branchi® are greenish, annulated with brown, white and yellow. The'first four segments
ventrally are marked with whitish and large brown touches. The dorsal surface has
whitish touches, and the cephalic lobe has brownish spots (Fauvel). Tube of mud with
fragments of algae and other sea-weeds.
S ynonyms.
1835. Amphitrite Gunneri, Sars. Beskrivel., p. 50, Tab. xi, fig. 30.
1844- » » CErsted. Nat. Tidsk., 2 ser., i, p. 415.
» j> « idem. Region. Mar., p. 79. .
1851. Amphicteis „ Grube. Pam. Annel., pp. 82 and 138.
1853* » » Sars. Nyt Mag., vii, p. 390, etc.
1855. Crossostoma midas, Gosse. Ann. Nat. Hist., vol. xvi, p. 310, pi. viii, figs. 7—12.
1857, Amphicteis Gmvneri, Koren. Nyt Mag. f. Nat., ix, p. 94.
1858, ” » P. Müller. Archiv f. Naturges., pp. 211—220, 2 plates.
1859, » » Danielssen. Kongl. Norsk. Vid. Selsk., p. 124.
1860.
1861.
1864.
1865.
1866.
1867.
1869.
1870.
1872.
1873.
1874.
1875.
1877.
1879.
1880.
1882.
1883.
1885.
1886.
1892.
1893.
1894.
1895.
1896.
1897.
1904.
1906.
1907.
1908.
1909.
Amphicteis groenlandica, Grube. Arch. f. Naturges., Bd. xxvi, p. 109, pi. v, fig. 3.
,, ' Gunneri, Danielssen. Reise, 1857, and Nyt Mag., xi, p. 55.
,, ,, Sars. Yidensk. Selsk. Forhandl., pp. 6, 13.
,, grcenlandica, De Quatrefages. Annel., t. ii, p. 393.
Oro8s08toma midas, idem. Ibid., p. 394.
„ Gunneri, Malmgren. Nord. Hafs. Annul., p. 365, Tab. xix, fig. 46.
Amphicteis ,, Kinberg. Ofr. Kongl. Yet. Akad. Forhandl., pp. 340—347.
„ „ Malmgren. Annul. Polych., p. 105. .
„ „ McIntosh. Trans. Roy. Soc. Edin., vol. xxv, p. 422, pi. xiv, fig. 14.
„ Grube. Jahrb. Schles. Ges., pp. 68—84.
„ curvipalea, Claparède. Suppl. Annel. Nap., p. 132, pi. xiii, fig. 5.
„ Gimneri, Marenzeller. Bremer Exped. (Zool. Jahrbucher), p. 429.
„ ,, Kupffer. Jahr. Comm. deut. Meere., 1871, p. 151.
„ „ Malm. Göteb. Annul., Kongl. Yet. Handl., xiv, pp. 63—105.
„ „ McIntosh. Ann. Nat. Hist., ser. 4, vol. xiv, p. 204.
,, ,, idem. Marine Invert, and Fishes St. Andrews, p. 129.
,, ,, Möbius. Jahresb. Comm. deut. Meere., 1872.
„ cu/rvipalea, Panceri. Atti Soc. Ital., vol. xviii, p. 532.
,, Gunneri, Marion. Rev. Sc. nat., iv, p. 307.
,, curvipalea, idem. Ibid., p. 307.
„ Gunneri, Marenzeller. Denks. Math. Nat. Cl. K. K. Akad. Wiss., xxxv, p. 35,
sep. abdr.
„ „ Théel. Kgl. Svensk. Yet.-Akad. Handl., vol. xvi, p. 61.
,, ,, Tauber. Annul. Danica, p. 128.
,, „ McIntosh. Ann. Nat. Hist. (October), p. 271.
„ „ Hansen. Nyt Mag. f. Nat. (Norske Nord.-Exped.), p. 46.
„ ,, Levinsen. Yidensk. Selsk., p. 163.
„ „ and curvipalea, Marion. Annales Mus. Hist. Nat. Marseilles, t. i, p. 60.
„ „ McIntosh. Annel. “ Challenger,” p. 426.
„ „ Wirén. Svensk. Vet.-Akad. Handl., n.f., vol. xxi, p. 15, pi. i, figs. 1—11.
„ ,, Levinsen.. Kara Havets, etc., p. 12.
„ „ Marenzeller. Zool. Jahrb., Bd. vi, p. 429.
„ „ Lo Bianco. Atti R. Accad. Sc. Nap., vol. v, No. 11, p. 63.
„ ,, Bidenkap. Christian. Yidensk. Selsk. Forh., No. 10, p. 123.
„ „ De St. Joseph. Ann. Sc. Nat. Zool., 7e sér., f. xvii, p. 163.
,, curvipalea, idem. Ibid., p. 163.
„ Gunneri, Fauvel. Mém. Soc. Nat. Cherbourg, 3e sér., t. xxix, pp. 345—6.
„ ,, idem. Bull. Soc. Linn. Normand, 6e sér., t. x, pp. 69, 76.
„ „ Appellöf. Bergens Mus. Aarb., p. 12.
„ „ Fauvel. Bull. Sc. France et Belg., t. xxx, pp. 411—430, pi. xxiv, figs. 144,
167, pi. xxv, figs. 150—161.
„ ,, Michaelsen. Polych. ^putsch. Meere., p. 164.
„ curvipalea, Birula. Bull. Acad. Imp. St. Petersb., 5e sér., vol. vii, p. 14.
,, „ Journ. M. B. A., vol. vii, p. 230.
„ Gunneri, Augener. Westind. Polych., p. 175.
„ „ Fauvel. Bull. Inst. Ocean., No. 107, p. 32.
,, „ Ehlers. Deutsch. Tiefsee Exped., p. 141.
,, ,, Fauvel. Ann. Sc. nat., 9e sér., t. x, p. 208.
„ „ idem. Bull. Inst. Ocean., No. 142, p. 22.