166 LEPRE A LAPIDARIA.
1808. Amphiro constrictor, Montagu. MS. vol. Linnean Soc., pi. xxxv, fig. 3.
1812. Terébella lapidaria, G-melin. Syst. nat., i, pt. vi, p. 3113.
1817. „ „ Cuvier. Règ. An., ii, p. 520.
1818 ?. „ constrictor, Montagu. Trans. Linn. Soc., vol. xii, p. 343, Tab. xiii, fig. 1.
1825. ,, lapidaria, Leacb. Encyclop. Brit. Suppl., p. 452.
1828. Amphitrite neapolitana, Delle Chiaje. Mem., iii, p. 169, Tav. xliii, fig. 4.
1836-49. Terébella constrictor, Cuvier. Illust. Edit., p. 25.
1841. Amphitrite neapolitana, Delle Chiaje. Descriz., iii, p. 70, v, p. 94, Tav. cv, fig. 4.
„ Terébella misenensis, Costa. Ann. Sc. nat., sér. ii, t. xvi, p. 271, pi. xi, fig. 3.
1843—53. ,,. ’ ,, Chenu. Illust. Conch., IIe livr., pi. vii, fig. 8.
1851. ,, constrictor, G-rube. Fam. Annel., p. 81.
1855. „ corallina, idem. Arch. Naturges., 21 Jahrg., p. 119, Taf. iv, fig. 17.
» ! y - pectinata, idem. Ibid., p. 120, Taf. iv, fig. 20.
1860. „ rosea, idem. Ibid., 26 Jahrg., p. 100.
1861. „ „ idem. Ausflug, n. Triest., pp. 86 and 149.
1864. „ corallina and T. pectinata, idem. Die Insel Lussin, p. 88.
1865. Idalia lapidaria, De Quatrefages. Annel., ii, p. 373.
,, Heterophyselia Bosci, idem. Ibid., p. 386.
,, (?) Leprea textrix, Malmgren. Nord. Hafs.-Annul., p. 389.
1867 (?). „ „ idem. Annul. Polych., p. Ill, Tab. xii, fig. 69.
1868. Heteroterébella sanguinea, Claparède. Annél. Nap., p. 388, pi. xxix, fig. 3, and pi. xxx,
fig-1-
„ Terébella suldgera, idem. Ibid., p. 400, pi. xviii, fig. 5.
Heterophyzelia Bosci, Grube. Arch. f. Naturges., 36 Jahrg., p. 334.
Terébella rosea, idem, Jahresber. Schles. Gesell., p. 51.
,, constrictor, idem. Abhandl. Schles. Gesell., 1869—70, pp. 7 and 36. _
,, misenensis, Panceri. Atti Soc. Ital. Sc. nat., vol. xviii, p. 530.
Heteroterébella sanguinea, Marion and Bobretzky. Ann. Sc. mat.,-6! sér., t. ii, p. 90.
Leprea lapidaria, Marenzeller. Sitzb. K. Akad. Wissensch. Wien, p. 180, sep. copy, p. 29.
• '/'0‘ià^.' Carus. Fauna Medit., i, p. 263.
V S Lo Bianco. Atti Acad. Sc. Napoli, 2e sér., t. v, p. 51.
Terébella „ De St. Joseph. Ann. Sc. nat., 7® sér., t. xvii, p. 202, pi. viii, figs. 225—229,
pi. ix, figs. 230, 231.
.ii „ , „ Journ. M. B. A., viii, p. 229.
„ „ ibid., vol. vii, p. 229.
„ De St. Joseph. Ann. Sc. nat., 9® sér., t. iii, p. 236.
„ „ Bohn. Ibid., 9® sér., t. iii, p. 120 (movements).
,, „ Fauvel. Bull. Inst. Ocean., cxlii, p. 28.
,, ,, idem. Ann. Sc. nat., 9® sér., t. x, p. 209.
,, „ idem. Bull. Inst. Ocean., No. 194, p. 41.
Southern. Proc. Roy. Irish Acad., vol. xxxi, No. 47, p. 122.
McIntosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 23.
Allen. Journ. M. B. A., vol. x, p. 633.
Rioja. Anél. Poliq. Cantâb., p. 50.
Hessle. Zool. Bidr. Uppsala, Bd. v, p. 188.
1870.
1871.
1872.
1875.
1884.
1885.
1893.
1894.
1904.
1906.
1909.
1911. „
1914. Leprea
1915. „
1917. Terebella
Habitat.—Abundant in cracks of rocks (gneiss) filled with mud and sand near
St. Sampson’s, Guernsey, and at other parts of the same island, as well as common in Herm
(A. and R. M.) ; on a gravelly bottom and in fissures of rocks, Polperro, Cornwall, and
two examples on a Pinna (Laughrin) ; west coast of Ireland, rare (Southern); in crevices
of shale, Plymouth (Spence Bate and B. Rowe, Allen and Todd).
Extends to the Mediterranean and all its bays; channel shores of Francie (De
Quatrefages); shores of Cantabria (Rioja, De St. Joseph).
The cephalic plate has a well-marked dorsal rim which curves laterally to become
continuous with the highly-arched supra-oral fold,, often thin anteriorly. It bears
numerous slightly grooved tentacles, which also differ from those of many other forms in
firmly adhering after preparation. They are pale yellow in life, with the red blood-vessel
in the centre. The buccal process or “ tongue ” inferiorly often projects as a smoothly
rounded mass obscuring the rim of the segment behind it. Eyes not always visible. The
structure of the cephalic region of this inhabitant of fissures in rocks does not differ
materially from those which dwell in more or less free tubes, except that the lingual
process or boss is large and that the tentacles show only a slight groove at the base, and
it seems to disappear from the rounded distal region, which is tapered and ends in a
slight knob.
The body (Plate CXIII, figs. 3 and 3 a) is comparatively short and firm, has the
typical shape—enlarged in front and tapered posteriorly—whilst the dorsal surface is
smoothly rounded to the level of the ridges for the hooks, and the ventral surface is marked
by a deep groove behind the twelve to thirteen scutes. Anteriorly the dorsum is minutely
striated transversely, and behind the branchiee it is finely tessellated after the manner of
Scalibregma. On the ventral surface are about twelve central shields which are of a
brighter red than the rest of the body, and behind them a white median stripe (marking
the nerve-cord) is continued to the tip of the tail, where it blends with the pale hue of the
region. The first segment with its rim behind the lower lip is whitish, and each scute
has a transverse whitish §treak at its posterior border. The ridges for the hooks are
somewhat paler than the general surface, and five of the anterior ridges have a glandular
white patch between them and the bristle-tufts—indeed, each setigerous process has a
glandular patch in front and behind. The dorsum throughout is dull brownish, inclining
to purple, in its native site, and merging into orange brown near the tip of the tail,"at
which the anus is surrounded with small but distinct papillaa (six to eight, De St. Joseph).
The perivisceral fluid contains reddish corpuscles, and corpuscles containing hasmatin
also occur in the vessels. The intestine harbours numerous gregarines (De St. Joseph).
The branchias are three in number on each side, the first the largest and the third the
least. Each arises by a short stem which divides somewhat dichotomously, but the
terminal divisions are both dichotomously and pinnately divided, the whole having the
aspect of a finely branched bush. In life they have a pale whitish-pink hue.
Two ridges run from the ventral scutes toward the first branchia, but they are
devoid of hooks and bristles. The first bristle-tuft is borne by the setigerous processes
opposite the second branchiae (fourth segment). The pale golden bristles (Plate CXXVI,
figs. 8, 8' and 8 a) form two groups, a shorter and a longer. The longer (Plate CXXVI,
fig. 8 a) have cylindrical shafts up to a slightly narrowed region behind the wings, which
are minutely serrated at the edge, followed by a visible enlargement as the wings arise.
After tapering considerably the slightly curved axis ends in a translucent knife-blade
tip, the base of which is thickened into a process or spur representing the termination