ormed, with
five steps generally distinct; at the upper angle there are two large
unequal spines, of which the lower one is the largest, with a third long
thin one on the first step; lower spines doubly serrated. Apodeme
directed inwards and backwards.

_Outer Maxillae_ (Pl. X, fig. 16) simply arched; the membrane of the
supra-oesophageal cavity under these maxillae is highly bullate and
villose. Olfactory orifices not prominent.

_Cirri._--First pair not seated far distant from the second pair. The
three posterior pair have the anterior faces of their segments
considerably protuberant, supporting four or five pairs of long
bristles; between which, there is a row of minute, fine, upwardly
pointing bristles: on the lateral upper margins of each segment, there
are a few very minute spines; dorsal tuft short, with thick and thin
spines intermingled. In the first cirrus (of which the rami are nearly
equal in length), and in the anterior ramus of the second cirrus, the
faces of the segments are highly protuberant, and clothed with thick
transverse rows of finely and doubly serrated spines: the anterior ramus
of the second cirrus is considerably thicker than the posterior ramus,
which latter, together with both rami of the third cirrus, differ from
the three posterior cirri only in the intermediate and in the lateral
marginal spines being slightly more developed.

_Caudal Appendages_, absent.

_Alimentary Canal._--The upper part of the stomach has four large caeca,
of which the posterior one is the largest; the whole surface, also, is
covered with minute pits, arranged in transverse rows.

_Generative System_, developed to an extraordinary degree. The testes
run into all the filamentary appendages, as well as more or less, into
the pedicels of the cirri: the two vesiculae seminales unite _within_ the
penis, either just beyond its basal constriction, or up one third of its
length. Penis short, hairy. The ovarian tubes not only fill the
peduncle, but extend in a thin sheet between the two folds of corium all
round the sack, close up to the terga. The two ovigerous fraena are
present in the usual position; the ovigerous lamellae either form several
layers, in pairs, one under the other, or are united in a single large
cup-formed sheet enclosing the whole animal.

_Colours._--The prevailing tint is a dark purplish-brown, which forms,
or tends to form, broad longitudinal bands on the peduncle and
capitulum.

_General Rema