fche main fang, and.the posterior outline curves forward to- the crown, and has a .
projecting process of the base inferiorly. The base has a gentle curve, slopes from:
behind downward and forward, and an eminence occurs on the . anterior curve below
the main fang. Stein pass from the ÿfeth on ,the crown to the posterior border of the
neck. The broad ridges for the, hooks are large in the bristled region, but thereafter
they diminish to short lamellæ, and then low ridges toward the tail. The posterior
hooks have smaller (shorter) bases and the posterior outline is less curved, toward
the crown.
There are several varieties of hooks. Thus (1) in those from South Devon the curve
of the back ofrthe hook and the base forms a semicircle, as Malmgren shows ; this is A with
four teeth above the main fang. The anterior ligament is considerably within the tip
of the main fang. (2) B, in which the. posterior Curve differs, the base, being shorter, the
posterior projections greater and the curve more abrupt. This resembles Malmgren s
groenlandica. The outline of the hook differs.
A variety of Amphitrite cirrata occurred in the “ Porcupine Expedition of 1870,
Station No. 8 in 690 fathoms, in which there is a tendency to the shortening of the
line from the anterior process (below the main fang), and a distinct hollow immediately
beneath the process, thus approaching A. ajfinis. Its branchiæ are unbranched, or perhaps
only a single one is split.
The small size of specimens from Bressay Sound is in contrast with that of those from
the south.
This species was entered by Linnæus (1767), along with Terebella lapidaria, but it
was O. F. Muller (1771) who gavé the name Amphitrite cirrata. Considerable confusion
existed in connection with the Terebellids and the Amphictenidse until the labours of
O. F, Müller, Fabricius (1780), Savigny (1820), Montagu (1818) and Risso (1826) rendered
it possible to place them on a more satisfactory footing : indeed Lamarck’s classification
(1812) rather increased the complexity, since the Pectinarians and Sabellarians were joined
with the Terebellids.
Montagu’s specimens from South Devon reached the length of 12 inches, and he
describes them as gregarious in tubes of sand and clay, half an inch projecting from the
surface. The branchiæ in the figure are ramose, but probably this was due to the artist.
His Amphiro cirrata1 as figured by Miss D’Orville is probably the same form though the
branchiæ are somewhat confused. It has seventeen pairs of bristles. This author s
Amphiro foetida? has branchiæ apparently unbranched, but differs from A. cirrata in having
bristle-tufts almost to the posterior end.
Chenu (1843—53) figures this species, but he shows only nine pairs of bristles
anteriorly, so that there is doubt.
The form which Dalyell (1853) describes as Terebella amehilega, the shell-binder,
appears to be an Amphitrite, and probably this species, though his artist has given
it bristle-tufts from front to rear. He found the reddish ova discharged from September
to December. His form made its tube of comminuted shells, though in confinement one
used sand. .
1 MS. vol. ‘Linn. Soc.,’ 1808, pi. xxviii, fig. 1.
2 Ibid., pi. xl, fig. 3.
The Terebella getatiritosabi Keferstein1 is probably an Amphitrite.
Panceri* (18?5) enters Amphitrite cirrata, O.P.M., as a distinct form from A. cirrata,
nsen’ (1877). describes and figures a remarkable crustacean parasite {Orypsi-
M N K M K B m the outer wall of the intestine of this B M W
The body of the female has the aspect of two wings, from the junction of which posteriorly
depend the egg-sacs, whilst at the opposite side is the month.
2 A m p h it r it e GBOENLAITDICA, Malmgren, 1 8 6 5 . Plate CXIX, fig . CXXXVIII, figs. 6 and 6 a—hooks.
resembles Amphitrite cirrata in g e n e r a l structure, but
has Jth tiy branched branchial on a short stem, nineteen pairs of: b r is tle s B D B T*“*
W erect character than in A. cirrata, and the slope made by the base more
nearly approaches a right angle, whilst five or six teeth occur i lateral view above the
main fang. Ten ventral scutes. Segments ninety to one hundred.
Synonyms.
1865. Amphitrite groenlandica, Malmgren. Nord. Hafs.-Annul., p. 366, Tab. xxi, fig. 5
10017 | idem. Annul. Polycb., p. 107.
^ 83' „ ; levinsen. Vid. Medial. Fork. Copenhagen, p. 175.
,,q i ” I Bidenkap. Yid.-selsk. Port. Christ., p. 127.
1912! H ' I \ Wolletak. Shrift, Selsk. Krist, 1911, No. 18, p. 102, pi. xxxv, fig. 4.
Meyer. Inaug. Dissert. Kiel, p. 36.
jJ I ” ” McIntosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 8.
1917! NeoLgMtrite |§§J Hessle. Zool. Bidr. Uppsala, Bd. v, p. 181.
Habitat.—Dredged in the B Porcupine | Expedition of 1869 m 164 fathoms on greyish
sand, stones and corals off Ireland, and in 808 fathoms on very soft, sticky mud off the
Irish coast in the same expedition:; in 690fathoms in the Atlantic (No. 3) m the Porcn-
pine ” Expedition of 1870.
Abroad it extends to Canada, Norway and Finmark. A . ' ' v , The bode,, which apparently ranges from 2 to 6 or 7 inches g length, is enlarged
anteriorly and tapered posteriorly, ending in a papillose terminal anus. The. large
lower lip occupies the centre, behind which is a I segment | with a double ring though
the posterior moiety is interrupted in the centre by a pair of small separate areas.
The next is the first ventral scute, which Qf short and supported on each side by a
cushion which extends to the mid-branchial region. This is followed by a narrow
though somewhat long scute. The next three are slightly broader (that is, antero-
posteriorly) and diminish a little in transverse diameter. Then follow four large and
broad scutes, behind which only a median trace is indicated and they disappear. There
are pairs of bristle-tufts, the first being opposite the last branchia, and placed
on low pads above the hook-rows. The two series, of bristles, the longer and shorter,
1 ‘ Zeitsph. f. wise. Zool./ Bd. xii, p. 128, Tab. xi, figs. 19—22 (1862).
“ ‘Atti Soc. Ital. Sp. Nat./vol. -xviii; p. 231. .
» < Yidenskab. Meddel. Naturhist. For. Kjobenhavn/ p. 25, Tab. vi, figs. 19, 20.