80 AMAGE AURICULA.
lateral, and project from the region as long processes sloping outward and backward.
Each bristle-tuft has a longer and a shorter series of translucent bristles with slightly
curved tips furnished with somewhat narrow wings (Plate CXXIV, fig. 6). The shaft
is minutely striated longitudinally, and widens a little as it approaches the tip.
The hooks (Plate CXXIV, fig. 6 a) have a somewhat triangular outline from the
breadth of the slightly sinuous crown. The posterior outline curves to the rounded
prow which is carried to the line of the teeth. The first tooth is as large as the second
and the two following are similar, the last being slightly broader at the base from the
curve of the gulf between it and the prow. Most of the hooks have five teeth, though
occasionally the larger have six, whilst some in the centre of the row may have only four
teeth. The posterior hooks are smaller, but they have the same form and structure.
Moreover the papillae or lamellae on which they occur are the only processes posteriorly,'
and are twelve to thirteen in number.
The tube is not mentioned by Malmgren, but is composed of a. lining of tough
secretion with a few sand-grains and free shreds of mucus, which give it the aspect of
being coated with minute algae.
ReproducturnMg-The larger example from St. Magnus Bay in July appears to be a
female with large ova»
The Sabellides adspersa of Grube 1 from Lussin Piccolo in the Adriatic seems to be
a closely allied form.
Genus CXLII.—Am agio, Malmgren, 1865.
Cephalic lobe sloping downward anteriorly; twice as broad as/ long, transversely
truncate posteriorly, and with two prominent papillae as if bifid, supported by glandular
fillets of the peristomium. Tentacles filiform, smooth. Tentacular membrane trilobed,
and with two glanular bands. Four subulate branchiae fixed on each side of the. third
and fourth segments. Anal segment with two cirri; stomach has a blind sac. Nephridia
with short, wide tubes, and the anterior are less than the posterior, which extend into
the fifth segment.
Setigerous processes commence on the third segment (on which they are small),
and are fourteen in number. Rows of hooks from the sixth segment to the penultimate
segment. Oval papillae above the hooks and bristles in the posterior segments. Capillary
bristles with very narrow wings, and tapered, slightly curved tips. Hooks pectiniform,
sub-triangular, 4—5 toothed.
1. Amage aubicula, Malmgren, 1865. Plate CXVIII, fig. 10—body; Plate CXXIV,
figs. 8 8 b—bristle and hooks; Plate CXXV—dorsal view, anterior end.
Specific Characters.—Cephalic region somewhat broad, and bent downward, the
prostomium being bifid; supported laterally and posteriorly by the fillets of the
1 ‘ Arch. f. Naturg./ xxix, p. 57, Tab. vi, fig. 2, 1863; and ‘ Jahresb. Scliles. Gesell.,5 1871, p. 80.
AMAGE AURICULA. 81
peristomium, which form a thick reflexed margin. Tentacles smooth. Branchiae four on
each side, affixed to the third and fourth segments (ten to twelve, Malmgren). Body
10—12 mm. long, 2-5 mm. at its widest part, gently tapered in front, somewhat flattened
from above downward, and diminishing gradually to the tail. Fourteen bristled segments
occur anteriorly and twelve in the posterior region, the last having two short subulate
caudal cirri; anal papillae small. Nephridia in the fourth, fifth, sixth and seventh segments.
Bristles with slightly curved, winged, and tapering tips. Hooks have a sinuous crown,
four to five teeth, and are present on eight segments (Hessle). Club-shaped dorsal cirri
better developed anteriorly than posteriorly.
Synonyms.
1865.
Amage auricula, Malmgren. Nord. Hafs. Annul., p. 371, Tab. xxv, fig. 72.
1866.
Sabellides brevicirrata, Sars. Vid.-Selsk. Forhandl., 1865.
1867.
Amage auricula, Malmgren. Annul. Polych., p. 106.
1868.
- „ Sars. Vid.-selsk. Forhandl., p. 10 (sep. copy).
1869.
„ ? McIntosh. Trans. Roy. Soc. Edim, vol. xxv, p. 423, pi. xiii, fig. 10.
1871.
Sabellides auricula, Grube. Schles. Gesell. (1870), p. 80.
1872.
Amage
1873.
1874
1878.
1879.
Sabellides
1883.
Amage
1884
1894.
1897.
1911.
1912.
1914
Sabellides
Amage
Malm. Annul. Göteb., p. 95.
Verrill. Americ. Journ. Sc. and Arts, ser. 3, vol. v, p. 98, etc.
idem. Proc. Americ. Assoc. Sc. (1873), Salem (fide auct.).
idem. Americ. Journ. Sc. and Arts, vol. vii, p. 411, etc.
McIntosh. Trans. Linn. Soc., ser. 2, Zool., p. 508.
Tauber. Annul. Danica, p. 129.
Levinsen. Vidensk. Meddel., p. 164.
Marenzeller. Denkschrift, der Mat.-Naturw. der K. Akad. d. wiss. Wien,
Bd. xlix, p. 2, Taf. ii, fig. 6.
Bidenkap. Christ. Vet.-Akad. Forhandl., p. 123.
Michaelsen. Polych. deutsch. Meere., p. 166.
Fauvel. Bull. Inst. Oceanogr., No. 194, p. 34.
Wollebask. Skriv. Vid.-selsk. Krist., No. 18, p. 65, pi. xiii, figs. 1—6.
Meyer, A. H. Inaug. Dissert. Kiel, p. 23.
Ditlevsen. Polych. Giynland, 3 Heft., p. 723.
Treadwell. Polych. Pacif. Coast Univ. Califor., vol. xiii, p. 211.
Fauvel. Campag. Scient. Monaco, Fasc. xlvi, p. 290, pi. xxviii,
figs. 13—16.
McIntosh. Ann. Nat. Hist., ser. 8, vol. xiii, p. 103.
Hessle. Zool. Bidr. Uppsala, No. 5, p. 120.
Habitat.—Procured by the “ Knight Errant ” in Trawl 2, Station 10, August 24th,
1882, in 576 fathoms.
“ Valorous ” Expedition, 1875; Atlantic Coast, U.S.A. (Verrill); Sweden (Malmgren,
Malm, Hessle); Japan (Marenzeller) ; Norway (Fauvel); Lofoten, Finmark, Dr#bak
(Wolleboek); Spitzbergen (Hessle).
The prostomium is characteristically bifid, supported laterally and posteriorly by the
folds of the peristomium, which form a thick, reflexed margin, the whole giving the
cephalic region considerable breadth,, and it is also bent downward. According to
Malmgren the filiform tentacles are smooth.