1915. •Terebellides stromi, McIntosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 41.
„ „ „ Allen. Journ. M. B. A., vol. x, p. 636.
„ „ stroemi, Southern. Irish Sc. Invest., No. 3, p. 47.
1916. „ stromi, McIntosh. Ann. Nat. Hist., vol. xvii, p. 59.
1917. „ strcemi, Hessle. Zool. Bidr. Uppsala^ Bd. 5, p. 137.
Hdlntat.—Stomach of haddock, St. Andrews (E. M.); dredged in 4—5 fathoms,
Ardmaddy Bay, Lochmaddy, in tenacious grey mud (and clay) ; Plymouth (Allen), Loch
Long (D. Robertson) ; dredged in the “ Porcupine ” Expedition, 1869, in 30—40 fathoms,
Dingle Bay, Ireland; young example in 422 fathoms, No. 15, “ Porcupine,” 1869 (54° 1' N.,
12° 14' W.) ; West Coast of Ireland, Clew Bay, etc. (Southern). A cosmopolitan form.
Abroad it has been found off Kerguelen (Ehlers), Japan (Hessle), North Pacific Coast of
North America (Moore), Behring’s Sea (Marenzeller), Atlantic (Grube, etc.), Greenland
(Michaelsen, Ditlevsen, etc.) ; Northern regions, such as Greenland, Spitzbergen, Norway,
Iceland, etc. (Sars and Malmgren); off Cape Guardia and in 31 fathoms off Cape Finis-
terre and in Bono Bay, “ Porcupine,” 1870; Siberian and Behring’s Seas (Wir6n);
Norway, Sweden and Finmark (Malmgren and Norman); Kerguelen, “ Challenger ” ;
Spitzbergen (Meyer); Kara-Havet (Levinsen); Adriatic (Grube); Mediterranean—
Naples (Lo Bianco); 300 fathoms off Norway (Sars, Wollebsek) ; Franz Joseph Land
(Augener); New England and Atlantic coast, U.S.A. (Verrill); Strait of Magellan
(Grube, Ehlers, McIntosh) ; Arctic Sea (Marenzeller); White Sea (Ssolowiew) ; West
Indies (Augener).
The cephalic region is almost as blunt as in Trichohranchus, though the great elevation
of the frilled cephalic plate is characteristic, since it rises from a slight collar high above
the dorsal outline and has a boldly folded margin, the two sides meeting in the middle
line inferiorly and forming a spout-shaped channel, the sides of which behind the mouth
in some are thickened. The cephalic plate thus has the surfaces directed anteriorly and
posteriorly instead of dorsally and ventrally as in Poly cirrus and other forms. The edges
of the plate posteriorly give origin to the tentacles, which are of a pale flesh colour,
grooved, often spoon-shaped, and, though not stretching much, coil actively in every
direction.
The body is enlarged in front and gently tapers to the tail, which is by no means
slender. It is smoothly rounded on the dorsum, and only in well-preserved examples
are the lines of the segments indicated. On the other hand the ventral surface presents
anteriorly bold glandular belts—the representatives of the scutes of other members of the
family. Besides, a great glandular semicircular lamella is placed immediately behind the
spout-shaped fold of the cephalic plate, separates the oral from the succeeding region,
and is evidently of great physiological importance. A narrow glandular ring follows,
the convex central region, being in some separated by a furrow from the lateral regions,
which diminish as they go outward. A broader ring, the second body-segment, which
bears the branchige dorsally, then follows, the central region, likewise marked off by two
furrows from the lateral regions. This is partly overlapped by the broad glandular belt
which stretches from side to side of the next Segment, and gives off the setigerous
process at each side. Four similar ventral belts follow—diminishing as they go, and
then the succeeding belts are narrow, separated by increasing breadths of non-glandular
tissue. Further, an almond-shaped area beneath each setigerous process is differentiated,
and on this the hooks appear on the sixth bristled segment and thereafter it becomes the
uncinigerous process, whilst between each a lateral glandular belt is continued
backward behind the bristled region on each side to the tail.
The general colour of the body is reddish or pale orange anteriorly, marked with red
laterally. Posteriorly it is greyish yellow (from the grey mud in the intestine). The
snout is pale, the branchige are of a deeper red or have pinkish lamellae, and a red
blood-vessel.
In this form the dissepiments are only developed posteriorly (Hessle).
The first setigerous process commences on the second segment, at the upper or
lateral edge of the ventral glandular belt, and below it is a slightly curved elevation with
the convexity anterior. Seventeen setigerous processes follow. Each is short and stout,
with a slightly bevelled tip grooved for the bristles. The first and second are smaller
and they slightly diminish posteriorly. The pale golden bristles (Plate CXXVII, figs. 5,.
5' and 5") have long and nearly cylindrical shafts, a little narrowed at the proximal end,
and distally tapering to a somewhat stiff curved tip, which ends in a hair-like point-
The tip has narrow but distinct wings. The bristles appear to be in a single series, the
stouter dorsal and the more translucent and slender ventral in position. Some present,
a stout shaft finely striated, and a peculiar and rather abrupt curvature at the tip-
(Plate CXXVII, fig. 5"), and apparently have a special function.
The rows of hooks commence on the sixth segment and continue to the posterior
end. In the bristled segments anteriorly they occur on slightly elevated ridges a short
distance below the setigerous processes with the exception of the first, which is close to
the base of the process. The ridges become more prominent before the bristles cease.
The rows are often conspicuous from their brownish colour. The golden hooks of the
first row not only diverge in position but in structure, for they are larger and
longer, have translucent shafts which dilate a little above the base, and again gradually
diminish to the neck, which is curved backward, the tip being bent at a little more than
a right angle and tapered to a sharp point—slightly turned up in some. The second
series shows hooks of the normal outline, besides others imperfectly formed—with
shorter shafts, and slightly curved, bifid tips, a distal longer and another shorter process
at a distance below it. The typical hook (Plate CXXVII, fig. 5 a) has a long, slightly
curved, finely-striated shaft which is slender at the base, dilates gradually in its
progress to the shoulder, near which it diminishes, the neck then being bent a little
backward, the enlarged crown having four teeth above the main fang, which is powerful
and sharp.
The uncinigerous processes become more prominent behind the bristled region, on
slightly flattened lamellae with wider truncated tips, and attain their maximum about the
twentieth from the end, and gradually diminish backward. In this region the hooks are
all of one kind and essentially different from those in the anterior region. Each hook
(Plate CXXVII, fig. 5 b) has a convex posterior region with a deep dimple above the
base, three large teeth above the main fang, the anterior outline having a slight process
below the main fang, whilst the base is convex inferiorly and short, the somewhat