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in:;
large, subquadrangular, lateral parts but slightly expanded, frontal edge trans-
versely truncated. Segments of mesosome with the lateral parts bluntly truncated.
Caudal segment circular in outline, lateral edges serrated, tip bluntly produced.
Eyes rather large, rounded oval. Superior antennae scarcely reaching beyond the
middle of the penultimate peduncular joint of the inferior ones, nagellum but little
longer than the peduncle, and composed in female of 8,
in male of 12 articula-
tions. Inferior antenna? in female not nearly attaining the length of the body,
in male considerably larger, equalling the body in length. 1st pair of legs in
female a little shorter than the next succeeding, but of the very same structure;
those of male more than twice as large, almost attaining the length of the whole
body, carpal joint oblong fusiform and, like the other joints, densely clothed with
short spiniform bristles. Middle piece of male operculum produced at the end.
on each side, to a lanceolate lappet minutely bind at the tip. Uropoda much
shorter than the caudal segment, and clothed with scattered fascicles of spiniform
bristles, inner ramus somewhat longer than the basal part, outer, considerably
smaller. Body yellowish, mottled everywhere with reddish brown specks. Length
of adult female 4 mm.,
of male 6 mm.
Remarks. As above stated, this is as yet the only known species
genus, and may easily be recognized from lanira maeulosa,
of the
to which it bears
some resemblance in colour and external appearance, by the comparatively much
shorter antenna? and uropoda.
Occurrence. I have only met with this form off the west coast of Norway,
in the neighbourhood of Bergen. In one locality, at Bratholmen,
it occurred in
considerable numbers on the roots and stems of Laminarise overgrown by Hydroida
and Polyzoa.
Distribution. Bohuslan (Bovallius).
Gen. 4. laera, Leach, 1813.
Syn: laerldina, M.-Edw.
Generic Characters. Body, as a rule, broad and much depressed, with
the lateral parts of all the segments laminarly expanded and fringed with bristles.
Cephalon broad, without any true rostrum, but with the lateral parts considerably
produced. Caudal segment with a more or less deep apical emargination, within
which the uropoda are contained. Eyes distinct, dorsal. Superior
antenme ex-
tremely small, with the tiagelliim rudimentary. Inferior antenna? of moderate