ped.

_Mouth._--On each side there are two slight prominences; one under the
mandibles, the other transverse nearer to the adductor muscle.

_Labrum_, placed near the adductor muscle, with the upper part not more
bullate than the lower part; crest with a row of blunt teeth, and many
fine bristles growing chiefly outside the teeth; there are many fine
bristles on the inner or supra-oesophageal fold of the labrum.

_Palpi_ not nearly touching each other, pointing towards the adductor:
much hollowed out on their inner sides, hence narrow and acuminated,
with doubly serrated bristles.

_Mandibles_, with three teeth and the inferior angle ending in a single
sharp spine; whole inferior portion narrow; first tooth as far from the
second, as the latter from the inferior angle; owing to the presence of
short thick spines projecting from the sides of the jaw, the lower edges
of the second and third teeth appear pectinated.

_Maxillae_, nearly two thirds of the width of the mandibles; beneath the
three larger upper spines there is a considerable notch, and the whole
lower part is very slightly upraised; edge irregular, with obscure
traces of either two projections, or perhaps of four steps.

_Outer Maxillae_, with bristles in front continuous; exteriorly there is
a slight prominence near each olfactory orifice, with a tuft of long
bristles.

_Cirri_ not much elongated; first pair placed not quite close to the
second; five posterior cirri nearly equal in length; pedicels long, with
irregularly scattered spines,--those on the pedicel of the first cirrus
beautifully and conspicuously feathered. The segments of the three
posterior pair are _not_ very short or broad; very slightly protuberant,
each with a long transverse, crescentic, narrow brush of bristles, which
stand two or three deep in the middle, but on the sides are single:
dorsal tufts long, and in the upper segments the spines are thick and
claw-like. This structure is common to all the cirri. First cirrus with
the rami unequal in length by two segments; from the shortness of the
pedicel, this cirrus is much shorter than the second, but its rami are
about two thirds of the length of those of the second cirrus. Second
cirrus (and in a less degree the third cirrus), with the anterior ramus
a shade broader than the posterior ramus, and rather more thickly
covered with spines than are the three posterior cirri. Fifteen segments
in the sixth cirrus; nine in the longer ramus