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of the terminal segment of the metasome. According to Messrs. Schodte and Liitken,
it sometimes attains a length of more than 56 mm., and is thus probably the
largest of all hitherto known Mgaz.
Occurrence. A few specimens of this pretty form are preserved in our
University Museum, some having been procured in the Christiania Fjord, some at
Farsund, on the south coast of Norway. It has, moreover, been found at Bergen,
at Floro, and in the Trondhjem Fjord. The specimens have been taken, some from
the skin of the common cod, some from that of the great shark.
Distribution. - - British Isles (Johnston), Skagerak (Meinert), Iceland
(Schodte & Liitken).
6. JEga, arctica, Liitken.
(PI. XXVI, fig. 2.)
arctica, Liitken, Vid. Medd. Nat. Hi*t. Foren. 1858, p. 71, PI. 1. A., figs. 13.
Specific Characters. Body oblong oval, with the dorsal face moderately
convex, and very smooth. Oephalon but little more than twice as long
broad, front slightly produced
as it is
in the middle. Mesosome with the transverse lines
of the 4 posterior segments not very sharply marked ; coxal plates
of moderate
size. Metasome rather large, considerably exceeding half the length of the meso-
some, epimera bluntly produced; terminal segment semioval, tip evenly rounded,
with a very small apical incision, dorsal face plain, edges in the outer part mi-
nutely serrated. Eyes of middle size, oval, separated above by a distinct, though
small interspace. Antennae unusually slender, the tirst 2 peduncular joints of the
superior ones but slightly expanded, and, combined, scarcely longer
than the last
peduncular joint. Legs and uropoda normal. Length of an apparently adult
specimen 32 mm.
Remarks. This species, established by Prof. Liitken, may be easily dis-
tinguished from those previously described by the slender form of the antennae,
the comparatively large size of the metasome, and the shape of its terminal
segment.
Occurrence. A single specimen of this form is preserved in our Univer-
sity Museum, having been procured in Finmark, probably
great shark.
from the skin of the
Distribution. Greenland (Liitken). Iceland (Schodte & Meinert).