ith short spines. The outer margin is
bilobed, as in _S. vulgare_, with the basal part supporting a great tuft
of long bristles, of which the greater number turn outwards, and almost
cover the olfactory orifices. The latter are slightly prominent, placed
some way apart from each other, with the above-mentioned tufts of
bristles between them. All the spines of the trophi are in some degree
doubly serrated.

_Cirri._--The first pair is seated rather far from the second pair, and
the prosoma being little developed, the shape of the body nearly
resembles that of _S. vulgare_. The posterior cirri are elongated, very
little curled, with the segments much flattened, not at all protuberant,
bearing from five to seven pair of long serrated spines, with a few
small spines in an exterior row; between each pair there is a very
minute tuft of small bristles; the upper lateral rim of each segment is
toothed with small spines; spines of the dorsal tufts, long, serrated.
_First pair_, elongated, having numerous segments, namely, seventeen,
whilst the sixth pair in the same individual had only twenty-one
segments; rami nearly equal; segments short, nearly cylindrical, thickly
clothed with long serrated spines. The _second_ and _third_ pair are
nearly equal in length; they have their anterior rami slightly thicker
than their posterior rami, both being much more thickly clothed with
spines, than are the three posterior pair of cirri. Pedicels, rather
short, with their inner edges not forming a projection, as in _S.
vulgare_.

_Caudal Appendages_ (Pl. X, fig. 20), uni-articulate, flat, rounded at
their ends and moderately long; clothed most thickly, like brushes, with
very fine bristles, which latter are serrated, and are longer than the
appendages themselves.

_Penis_, of small size, narrow, pointed, and thickly clothed with
delicate hairs; in length equalling only one fourth of the sixth cirrus.

_Ovigerous Fraena_, small, semicircular; entire edge thickly covered with
glands. Ovarian tubes, within the peduncle, fully developed as usual.

_Affinities._--This species differs from all the others in the absence
of calcareous scales on the peduncle; but it has no other character
which at all justifies its generic separation. In the shape of the scuta
and carina it comes nearest to _S. vulgare_. Taking all the characters
together, it is scarcely possible to say to which of the other species
it is most closely allied, having close affinit