TRI OPA CLAVIGER.
Fam. 1, Plate 20.
TRIOPA CLAVIGER, Muller, S p .
T. albus, dorso tuberculis aurantiacis: appendicibus linearibus pallii flavo-terminatis: tentaculis
subclavatis, flavis: branchiis 3, bipinnatis, flavo-terminatis. S
Doris clavigera, Müller, Zool. Dan. Brod. 229.
Idem, Zool. Daii. v.T, p. 17, pl. 17, f. 1-3.
Gmel.,* Linn. Syst. Nät. p. 3Ä)4.
Tergipes pulcher, Johns., in Loud. Mag. Nat. Hist. v. 7, p. 490, f. 59.
Euplocamus plumosus, Thomp., in Ann. Nat. Hist. v. 5, p. 90, pl. 2, f. 4.
Euplocamus claviger, Idem, in- Report Brit. Assoc, for 1843, p. 250.
Triopa claviger, Johns., in Ann. Nat. Hist. v. 1, p. 124.
Loven, Index Moll. Scand. p. 6.
* Hab. At different depths, from twenty fathoms to within tide-marks, on most of our coasts.
Berwick Bay, Dr. Johnston. Cullercoats, not common, and always from deepish water. Loch
Strangford, and Lahinch, Co. Clare, Ireland, W. Thompson, Esq. Isle of M an; and Bressay Sound,
Shetland, Professor E. Forbes. Whiting Bay, Isle of Arran, D. Landsborough, Esq. Not uncommon
near low-water mark, Torbay; Salcombe Bay, Devonshire; Fowey Harbour, and Helford River,
Cornwall, J. A.
Body from half to three quarters of an inch in length, elongated, depressed, rounded
in front, nearly parallel at the sides, and tapering to an obtuse point behind; white, with all,
the processes tipped with yellow or orange : a line of yellow spots generally runs between the
cloak and foot to the tail, and on the latter is a central streak of the same colour. Cloak
indistinct, white ; with a few scattered, obtuse, orange or scarlet tubercles, of unequal sizes, on
the back ; the margin surrounded by about twenty longish, linear or subclavate appendages,
each terminated with yellow or orange: six or seven of these are arranged on each side; they
are obtuse, and usually curved towards the back, in a greater or less degree, according to the
will of the animal, which has the power of moving them either.together or separately. Those
round the front are of smaller size, taper gradually to a point, and are generally a little branched
or tuberculated towards the end: they are about eight in number, the two central ones smallest.
Dorsal tentacles set far apart, linear or subclavate, laminated to near the base with about
fourteen or fifteen plates ; they are yellow Qn the laminated part, and transparent white below.
Sheaths small, plain, and rather tight. Head rather small, with two short cylindrical oral
tentacles, truncated at the- end, longitudinally folded, and open along the upper side.
Branchial plumes three, rather long, narrow, and elliptic; bipinnate, transparent white
tipped with yellow. Foot transparent white, with a narrow longitudinal patch of pinkish-,
brown, from the liver, in the cfentre. It is truncated and deeply indented in the middle in
front, and terminates in an obtuse point behind.